<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <roleRef roleURI="http://www.mfri.com/role/BalanceSheetParentheticalParentheticals" xlink:href="mfri-20150430.xsd#BalanceSheetParentheticalParentheticals" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/BasisOfPresentation" xlink:href="mfri-20150430.xsd#BasisOfPresentation" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/BasisOfPresentationDetails" xlink:href="mfri-20150430.xsd#BasisOfPresentationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/BasisOfPresentationTables" xlink:href="mfri-20150430.xsd#BasisOfPresentationTables" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/BusinessSegmentReporting" xlink:href="mfri-20150430.xsd#BusinessSegmentReporting" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/BusinessSegmentReportingDetails" xlink:href="mfri-20150430.xsd#BusinessSegmentReportingDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/BusinessSegmentTables" xlink:href="mfri-20150430.xsd#BusinessSegmentTables" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/CashSurrenderValueOnLifeInsurancePoliciesDetails" xlink:href="mfri-20150430.xsd#CashSurrenderValueOnLifeInsurancePoliciesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/CashSurrenderValueOnLifeInsurancePoliciesNotes" xlink:href="mfri-20150430.xsd#CashSurrenderValueOnLifeInsurancePoliciesNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/CashSurrenderValueOnLifeInsurancePoliciesTables" xlink:href="mfri-20150430.xsd#CashSurrenderValueOnLifeInsurancePoliciesTables" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/ConsolidatedBalanceSheetsUnaudited" xlink:href="mfri-20150430.xsd#ConsolidatedBalanceSheetsUnaudited" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/ConsolidatedBalanceSheetsUnauditedCalc2" xlink:href="mfri-20150430.xsd#ConsolidatedBalanceSheetsUnauditedCalc2" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/ConsolidatedStatementsOfCashFlowsUnaudited" xlink:href="mfri-20150430.xsd#ConsolidatedStatementsOfCashFlowsUnaudited" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/ConsolidatedStatementsOfComprehensiveLossIncomeUnaudited" xlink:href="mfri-20150430.xsd#ConsolidatedStatementsOfComprehensiveLossIncomeUnaudited" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/ConsolidatedStatementsOfOperationsUnaudited" xlink:href="mfri-20150430.xsd#ConsolidatedStatementsOfOperationsUnaudited" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/ConsolidatedStatementsOfOperationsUnauditedCalc2" xlink:href="mfri-20150430.xsd#ConsolidatedStatementsOfOperationsUnauditedCalc2" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/ConsolidatedStatementsOfStockholdersEquity" xlink:href="mfri-20150430.xsd#ConsolidatedStatementsOfStockholdersEquity" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/Debt" xlink:href="mfri-20150430.xsd#Debt" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/DebtDetails" xlink:href="mfri-20150430.xsd#DebtDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/EarningsPerShare" xlink:href="mfri-20150430.xsd#EarningsPerShare" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/EarningsPerShareDetails" xlink:href="mfri-20150430.xsd#EarningsPerShareDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/EarningsPerShareTables" xlink:href="mfri-20150430.xsd#EarningsPerShareTables" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/EntityInformationDocument" xlink:href="mfri-20150430.xsd#EntityInformationDocument" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/FairValueOfFinancialInstruments" xlink:href="mfri-20150430.xsd#FairValueOfFinancialInstruments" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/FairValueOfFinancialInstrumentsDetails" xlink:href="mfri-20150430.xsd#FairValueOfFinancialInstrumentsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/ImpairmentOfLongLivedAssetsDetails" xlink:href="mfri-20150430.xsd#ImpairmentOfLongLivedAssetsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/ImpairmentOfLongLivedAssetsNotes" xlink:href="mfri-20150430.xsd#ImpairmentOfLongLivedAssetsNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/ImpairmentOfLongLivedAssetsTables" xlink:href="mfri-20150430.xsd#ImpairmentOfLongLivedAssetsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/IncomeTaxes" xlink:href="mfri-20150430.xsd#IncomeTaxes" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/IncomeTaxesIncomeTaxesDetails" xlink:href="mfri-20150430.xsd#IncomeTaxesIncomeTaxesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/InterestExpenseNet" xlink:href="mfri-20150430.xsd#InterestExpenseNet" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/InterestExpenseNetDetails" xlink:href="mfri-20150430.xsd#InterestExpenseNetDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/InterestExpenseNetTables" xlink:href="mfri-20150430.xsd#InterestExpenseNetTables" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/InvestmentInJointVentureDetails" xlink:href="mfri-20150430.xsd#InvestmentInJointVentureDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/InvestmentInJointVentureNotes" xlink:href="mfri-20150430.xsd#InvestmentInJointVentureNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/InvestmentInJointVentureTables" xlink:href="mfri-20150430.xsd#InvestmentInJointVentureTables" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/OtherIntangibleAssetsWithDefiniteLivesDetails" xlink:href="mfri-20150430.xsd#OtherIntangibleAssetsWithDefiniteLivesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/OtherIntangibleAssetsWithDefiniteLivesNotes" xlink:href="mfri-20150430.xsd#OtherIntangibleAssetsWithDefiniteLivesNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/OtherIntangibleAssetsWithDefiniteLivesTables" xlink:href="mfri-20150430.xsd#OtherIntangibleAssetsWithDefiniteLivesTables" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/RecentAccountingPronouncements" xlink:href="mfri-20150430.xsd#RecentAccountingPronouncements" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/RecentAccountingPronouncementsDetails" xlink:href="mfri-20150430.xsd#RecentAccountingPronouncementsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/ReclassificationsDetails" xlink:href="mfri-20150430.xsd#ReclassificationsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/ReclassificationsNotes" xlink:href="mfri-20150430.xsd#ReclassificationsNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/ReclassificationsTables" xlink:href="mfri-20150430.xsd#ReclassificationsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/StockBasedCompensation" xlink:href="mfri-20150430.xsd#StockBasedCompensation" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/StockBasedCompensationDetails" xlink:href="mfri-20150430.xsd#StockBasedCompensationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/StockBasedCompensationFairValueAssumptionsDetails" xlink:href="mfri-20150430.xsd#StockBasedCompensationFairValueAssumptionsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/StockBasedCompensationRestrictedStockDetails" xlink:href="mfri-20150430.xsd#StockBasedCompensationRestrictedStockDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/StockBasedCompensationStockBasedCompensationExpenseDetails" xlink:href="mfri-20150430.xsd#StockBasedCompensationStockBasedCompensationExpenseDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/StockBasedCompensationStockCompensationTables" xlink:href="mfri-20150430.xsd#StockBasedCompensationStockCompensationTables" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/TreasuryStockShareRepurchaseProgramDetails" xlink:href="mfri-20150430.xsd#TreasuryStockShareRepurchaseProgramDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/TreasuryStockShareRepurchaseProgramNotes" xlink:href="mfri-20150430.xsd#TreasuryStockShareRepurchaseProgramNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.mfri.com/role/TreasuryStockShareRepurchaseProgramTables" xlink:href="mfri-20150430.xsd#TreasuryStockShareRepurchaseProgramTables" xlink:type="simple" />
  <calculationLink xlink:role="http://www.mfri.com/role/BalanceSheetParentheticalParentheticals" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/BasisOfPresentation" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/BasisOfPresentationDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/BasisOfPresentationTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/BusinessSegmentReporting" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/BusinessSegmentReportingDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/BusinessSegmentTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/CashSurrenderValueOnLifeInsurancePoliciesDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/CashSurrenderValueOnLifeInsurancePoliciesNotes" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/CashSurrenderValueOnLifeInsurancePoliciesTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/ConsolidatedBalanceSheetsUnaudited" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_b517a4f1-4597-b094-2608-75af660328e1" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_67f49e84-05fd-4b0b-ae5a-e9913b97cea2" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_b517a4f1-4597-b094-2608-75af660328e1" xlink:to="loc_us-gaap_AssetsCurrent_67f49e84-05fd-4b0b-ae5a-e9913b97cea2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_999960f8-6702-f7e9-88df-fcb8021751b2" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_67f49e84-05fd-4b0b-ae5a-e9913b97cea2" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_999960f8-6702-f7e9-88df-fcb8021751b2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestrictedCashAndInvestmentsCurrent" xlink:label="loc_us-gaap_RestrictedCashAndInvestmentsCurrent_4739c394-d98c-de24-213b-0ffcce75d7b3" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_67f49e84-05fd-4b0b-ae5a-e9913b97cea2" xlink:to="loc_us-gaap_RestrictedCashAndInvestmentsCurrent_4739c394-d98c-de24-213b-0ffcce75d7b3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_dc301a2a-78b3-2f7c-72b2-6d5ec18f9327" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_67f49e84-05fd-4b0b-ae5a-e9913b97cea2" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_dc301a2a-78b3-2f7c-72b2-6d5ec18f9327" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_a00a52e0-8d97-7156-7079-2c628ca1666f" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_67f49e84-05fd-4b0b-ae5a-e9913b97cea2" xlink:to="loc_us-gaap_InventoryNet_a00a52e0-8d97-7156-7079-2c628ca1666f" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_3227d5e9-cb9d-fda7-e599-c6fb89b5e07a" xlink:type="locator" />
    <calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_67f49e84-05fd-4b0b-ae5a-e9913b97cea2" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_3227d5e9-cb9d-fda7-e599-c6fb89b5e07a" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear" xlink:label="loc_us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear_a6111c93-6a2d-04cc-582c-c268e2ba993e" xlink:type="locator" />
    <calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_67f49e84-05fd-4b0b-ae5a-e9913b97cea2" xlink:to="loc_us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear_a6111c93-6a2d-04cc-582c-c268e2ba993e" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_a1eaafaf-055b-e423-85ef-4424fb2ef4e4" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_b517a4f1-4597-b094-2608-75af660328e1" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_a1eaafaf-055b-e423-85ef-4424fb2ef4e4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AssetsNoncurrent" xlink:label="loc_us-gaap_AssetsNoncurrent_d0d0d3d2-a57d-313f-aa09-3ce09e212c98" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_b517a4f1-4597-b094-2608-75af660328e1" xlink:to="loc_us-gaap_AssetsNoncurrent_d0d0d3d2-a57d-313f-aa09-3ce09e212c98" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NotesAndLoansReceivableNetNoncurrent" xlink:label="loc_us-gaap_NotesAndLoansReceivableNetNoncurrent_47c2ec9d-d583-5ec3-5acb-a4812964baf9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNoncurrent_d0d0d3d2-a57d-313f-aa09-3ce09e212c98" xlink:to="loc_us-gaap_NotesAndLoansReceivableNetNoncurrent_47c2ec9d-d583-5ec3-5acb-a4812964baf9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures" xlink:label="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_dc7ac10f-21da-71cb-8e28-a743d07dc83d" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNoncurrent_d0d0d3d2-a57d-313f-aa09-3ce09e212c98" xlink:to="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_dc7ac10f-21da-71cb-8e28-a743d07dc83d" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CashSurrenderValueOfLifeInsurance" xlink:label="loc_us-gaap_CashSurrenderValueOfLifeInsurance_6060ff4b-65cf-ecef-f96d-1dc3a44907f5" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNoncurrent_d0d0d3d2-a57d-313f-aa09-3ce09e212c98" xlink:to="loc_us-gaap_CashSurrenderValueOfLifeInsurance_6060ff4b-65cf-ecef-f96d-1dc3a44907f5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_4599c23a-11f0-4277-ea32-9886d26f8792" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNoncurrent_d0d0d3d2-a57d-313f-aa09-3ce09e212c98" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_4599c23a-11f0-4277-ea32-9886d26f8792" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationLongLivedAssets" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationLongLivedAssets_64eaffe2-6e8c-b8ea-319d-ea2334afae3e" xlink:type="locator" />
    <calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNoncurrent_d0d0d3d2-a57d-313f-aa09-3ce09e212c98" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationLongLivedAssets_64eaffe2-6e8c-b8ea-319d-ea2334afae3e" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_ae9fd5e7-8741-dfbd-241e-1460ec6c786e" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_1477e02d-b6d8-3df6-e715-8364fedce6d9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_ae9fd5e7-8741-dfbd-241e-1460ec6c786e" xlink:to="loc_us-gaap_LiabilitiesCurrent_1477e02d-b6d8-3df6-e715-8364fedce6d9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaap_AccountsPayableCurrent_bd7b63fa-09ae-1100-16fe-5ac027208548" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_1477e02d-b6d8-3df6-e715-8364fedce6d9" xlink:to="loc_us-gaap_AccountsPayableCurrent_bd7b63fa-09ae-1100-16fe-5ac027208548" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_d69c5cc5-fc70-31a7-c2b1-924eb363b75b" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_1477e02d-b6d8-3df6-e715-8364fedce6d9" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_d69c5cc5-fc70-31a7-c2b1-924eb363b75b" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccruedSalesCommissionCurrent" xlink:label="loc_us-gaap_AccruedSalesCommissionCurrent_628598e3-8225-3f71-aa80-121a8566d7bb" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_1477e02d-b6d8-3df6-e715-8364fedce6d9" xlink:to="loc_us-gaap_AccruedSalesCommissionCurrent_628598e3-8225-3f71-aa80-121a8566d7bb" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LinesOfCreditCurrent" xlink:label="loc_us-gaap_LinesOfCreditCurrent_37f640e0-3fac-dd55-c295-d8d14cefc1bb" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_1477e02d-b6d8-3df6-e715-8364fedce6d9" xlink:to="loc_us-gaap_LinesOfCreditCurrent_37f640e0-3fac-dd55-c295-d8d14cefc1bb" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="loc_us-gaap_LongTermDebtCurrent_0601d697-1537-c3cb-caaf-11141ac92b39" xlink:type="locator" />
    <calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_1477e02d-b6d8-3df6-e715-8364fedce6d9" xlink:to="loc_us-gaap_LongTermDebtCurrent_0601d697-1537-c3cb-caaf-11141ac92b39" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CustomerDepositsCurrent" xlink:label="loc_us-gaap_CustomerDepositsCurrent_3f9f8f3c-d9bc-3954-09ce-712ac02934b1" xlink:type="locator" />
    <calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_1477e02d-b6d8-3df6-e715-8364fedce6d9" xlink:to="loc_us-gaap_CustomerDepositsCurrent_3f9f8f3c-d9bc-3954-09ce-712ac02934b1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BillingsInExcessOfCostCurrent" xlink:label="loc_us-gaap_BillingsInExcessOfCostCurrent_b650b8f8-df8e-80fe-5149-d9dc8cca264f" xlink:type="locator" />
    <calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_1477e02d-b6d8-3df6-e715-8364fedce6d9" xlink:to="loc_us-gaap_BillingsInExcessOfCostCurrent_b650b8f8-df8e-80fe-5149-d9dc8cca264f" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_1d834322-984c-3ee2-a4a0-2dc90b007763" xlink:type="locator" />
    <calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_1477e02d-b6d8-3df6-e715-8364fedce6d9" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_1d834322-984c-3ee2-a4a0-2dc90b007763" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredTaxLiabilitiesCurrent" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesCurrent_712a848e-6493-088e-8a82-029610cac2c5" xlink:type="locator" />
    <calculationArc order="9" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_1477e02d-b6d8-3df6-e715-8364fedce6d9" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesCurrent_712a848e-6493-088e-8a82-029610cac2c5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccruedIncomeTaxesCurrent" xlink:label="loc_us-gaap_AccruedIncomeTaxesCurrent_56153815-752a-9a04-a52a-64cc2ec71213" xlink:type="locator" />
    <calculationArc order="10" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_1477e02d-b6d8-3df6-e715-8364fedce6d9" xlink:to="loc_us-gaap_AccruedIncomeTaxesCurrent_56153815-752a-9a04-a52a-64cc2ec71213" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_f8fc015c-e955-e5de-7b83-35021873c1f2" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_ae9fd5e7-8741-dfbd-241e-1460ec6c786e" xlink:to="loc_us-gaap_LiabilitiesNoncurrent_f8fc015c-e955-e5de-7b83-35021873c1f2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_89b83a57-ffbc-fc48-170d-f8b25d163e54" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_f8fc015c-e955-e5de-7b83-35021873c1f2" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_89b83a57-ffbc-fc48-170d-f8b25d163e54" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent" xlink:label="loc_us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent_43cb21a8-2603-f1eb-dd00-978244615172" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_f8fc015c-e955-e5de-7b83-35021873c1f2" xlink:to="loc_us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent_43cb21a8-2603-f1eb-dd00-978244615172" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_f7fce5cd-2d53-a8b3-a485-6d0f3635b8fe" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_f8fc015c-e955-e5de-7b83-35021873c1f2" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_f7fce5cd-2d53-a8b3-a485-6d0f3635b8fe" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredTaxLiabilitiesNoncurrent" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesNoncurrent_43aaac76-959d-69e2-234b-7c7a89d77345" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_f8fc015c-e955-e5de-7b83-35021873c1f2" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesNoncurrent_43aaac76-959d-69e2-234b-7c7a89d77345" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_0238306b-d9b2-65ce-a791-9c164638ef5a" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_ae9fd5e7-8741-dfbd-241e-1460ec6c786e" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_0238306b-d9b2-65ce-a791-9c164638ef5a" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_ffd09989-75a8-4713-beb0-21bebb3561d6" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_0238306b-d9b2-65ce-a791-9c164638ef5a" xlink:to="loc_us-gaap_CommonStockValue_ffd09989-75a8-4713-beb0-21bebb3561d6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="loc_us-gaap_AdditionalPaidInCapital_dcbd5d14-4ec6-06fe-e5c1-a41efced6761" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_0238306b-d9b2-65ce-a791-9c164638ef5a" xlink:to="loc_us-gaap_AdditionalPaidInCapital_dcbd5d14-4ec6-06fe-e5c1-a41efced6761" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TreasuryStockValue" xlink:label="loc_us-gaap_TreasuryStockValue_719740e5-b138-f870-281f-ac4786e101c2" xlink:type="locator" />
    <calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_0238306b-d9b2-65ce-a791-9c164638ef5a" xlink:to="loc_us-gaap_TreasuryStockValue_719740e5-b138-f870-281f-ac4786e101c2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RetainedEarningsUnappropriated" xlink:label="loc_us-gaap_RetainedEarningsUnappropriated_a83354f7-542b-eaba-e2c7-ad55fe7063b5" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_0238306b-d9b2-65ce-a791-9c164638ef5a" xlink:to="loc_us-gaap_RetainedEarningsUnappropriated_a83354f7-542b-eaba-e2c7-ad55fe7063b5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_4d60b95b-a2a9-55da-7eaa-2ca718a58484" xlink:type="locator" />
    <calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_0238306b-d9b2-65ce-a791-9c164638ef5a" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_4d60b95b-a2a9-55da-7eaa-2ca718a58484" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.mfri.com/role/ConsolidatedBalanceSheetsUnauditedCalc2" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/ConsolidatedStatementsOfCashFlowsUnaudited" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_46b895b2-8ff5-9e37-d4c3-5b75649cbcba" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b6b5c2f7-2ab7-a264-6d06-119dda52768c" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_46b895b2-8ff5-9e37-d4c3-5b75649cbcba" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b6b5c2f7-2ab7-a264-6d06-119dda52768c" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_faecc408-4bea-6e13-83bd-71b4c2ddf64c" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b6b5c2f7-2ab7-a264-6d06-119dda52768c" xlink:to="loc_us-gaap_NetIncomeLoss_faecc408-4bea-6e13-83bd-71b4c2ddf64c" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_76f611bf-6cac-2837-6d7c-3028d488fc3b" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b6b5c2f7-2ab7-a264-6d06-119dda52768c" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_76f611bf-6cac-2837-6d7c-3028d488fc3b" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GainLossOnSaleOfBusiness" xlink:label="loc_us-gaap_GainLossOnSaleOfBusiness_5d63431d-7588-de8d-7f25-6461ae2f32f3" xlink:type="locator" />
    <calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b6b5c2f7-2ab7-a264-6d06-119dda52768c" xlink:to="loc_us-gaap_GainLossOnSaleOfBusiness_5d63431d-7588-de8d-7f25-6461ae2f32f3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_b14e4ab6-e003-13d4-eacd-26899afc8b93" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b6b5c2f7-2ab7-a264-6d06-119dda52768c" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_b14e4ab6-e003-13d4-eacd-26899afc8b93" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_aa7a0bc5-86c6-13a8-3676-9960bad8007f" xlink:type="locator" />
    <calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b6b5c2f7-2ab7-a264-6d06-119dda52768c" xlink:to="loc_us-gaap_ShareBasedCompensation_aa7a0bc5-86c6-13a8-3676-9960bad8007f" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NoncontrollingInterestInNetIncomeLossJointVenturePartnersNonredeemable" xlink:label="loc_us-gaap_NoncontrollingInterestInNetIncomeLossJointVenturePartnersNonredeemable_9b654f26-1dba-64b7-1c11-60a1b47f79f7" xlink:type="locator" />
    <calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b6b5c2f7-2ab7-a264-6d06-119dda52768c" xlink:to="loc_us-gaap_NoncontrollingInterestInNetIncomeLossJointVenturePartnersNonredeemable_9b654f26-1dba-64b7-1c11-60a1b47f79f7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LifeInsuranceCorporateOrBankOwnedChangeInValue" xlink:label="loc_us-gaap_LifeInsuranceCorporateOrBankOwnedChangeInValue_6fc9e4d8-1a3b-0222-0a70-746dbb1cbece" xlink:type="locator" />
    <calculationArc order="7" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b6b5c2f7-2ab7-a264-6d06-119dda52768c" xlink:to="loc_us-gaap_LifeInsuranceCorporateOrBankOwnedChangeInValue_6fc9e4d8-1a3b-0222-0a70-746dbb1cbece" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GainLossOnDispositionOfAssets" xlink:label="loc_us-gaap_GainLossOnDispositionOfAssets_2ce8accf-e09c-efa1-9d09-9b291f4dca51" xlink:type="locator" />
    <calculationArc order="8" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b6b5c2f7-2ab7-a264-6d06-119dda52768c" xlink:to="loc_us-gaap_GainLossOnDispositionOfAssets_2ce8accf-e09c-efa1-9d09-9b291f4dca51" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProvisionForDoubtfulAccounts" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_066c5327-a2bd-1e65-f437-dc52fde39187" xlink:type="locator" />
    <calculationArc order="9" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b6b5c2f7-2ab7-a264-6d06-119dda52768c" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_066c5327-a2bd-1e65-f437-dc52fde39187" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_fc73bf45-b7cf-c894-bf3a-f56c9d39cbe4" xlink:type="locator" />
    <calculationArc order="10" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b6b5c2f7-2ab7-a264-6d06-119dda52768c" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_fc73bf45-b7cf-c894-bf3a-f56c9d39cbe4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_d2a8fa0f-43df-513c-7a7b-93e04034bb1e" xlink:type="locator" />
    <calculationArc order="11" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b6b5c2f7-2ab7-a264-6d06-119dda52768c" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_d2a8fa0f-43df-513c-7a7b-93e04034bb1e" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInBillingInExcessOfCostOfEarnings" xlink:label="loc_us-gaap_IncreaseDecreaseInBillingInExcessOfCostOfEarnings_31ce0625-5e4e-223f-7ce8-2c70523f00f9" xlink:type="locator" />
    <calculationArc order="12" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b6b5c2f7-2ab7-a264-6d06-119dda52768c" xlink:to="loc_us-gaap_IncreaseDecreaseInBillingInExcessOfCostOfEarnings_31ce0625-5e4e-223f-7ce8-2c70523f00f9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_b9fb8522-752c-3209-8cca-60e64f420ad5" xlink:type="locator" />
    <calculationArc order="13" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b6b5c2f7-2ab7-a264-6d06-119dda52768c" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_b9fb8522-752c-3209-8cca-60e64f420ad5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_81d33709-3a03-d961-0ad3-fd439ce3c40d" xlink:type="locator" />
    <calculationArc order="14" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b6b5c2f7-2ab7-a264-6d06-119dda52768c" xlink:to="loc_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_81d33709-3a03-d961-0ad3-fd439ce3c40d" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInCustomerDeposits" xlink:label="loc_us-gaap_IncreaseDecreaseInCustomerDeposits_4e499866-5268-9681-e009-e57111cb1743" xlink:type="locator" />
    <calculationArc order="15" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b6b5c2f7-2ab7-a264-6d06-119dda52768c" xlink:to="loc_us-gaap_IncreaseDecreaseInCustomerDeposits_4e499866-5268-9681-e009-e57111cb1743" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable_620f2dd6-f79e-0f14-fcc3-a5de4147cb91" xlink:type="locator" />
    <calculationArc order="16" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b6b5c2f7-2ab7-a264-6d06-119dda52768c" xlink:to="loc_us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable_620f2dd6-f79e-0f14-fcc3-a5de4147cb91" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_07d730ea-b32b-956c-677e-cf5b73c388b0" xlink:type="locator" />
    <calculationArc order="17" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b6b5c2f7-2ab7-a264-6d06-119dda52768c" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_07d730ea-b32b-956c-677e-cf5b73c388b0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_b8c20b3a-3bcf-0736-e626-15ffaf302374" xlink:type="locator" />
    <calculationArc order="18" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b6b5c2f7-2ab7-a264-6d06-119dda52768c" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_b8c20b3a-3bcf-0736-e626-15ffaf302374" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_fb013d5f-7e0c-1a40-5a42-42bd8c3a1d51" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_46b895b2-8ff5-9e37-d4c3-5b75649cbcba" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_fb013d5f-7e0c-1a40-5a42-42bd8c3a1d51" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_37181af6-e562-cefc-f2b6-8490ea2c3e04" xlink:type="locator" />
    <calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_fb013d5f-7e0c-1a40-5a42-42bd8c3a1d51" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_37181af6-e562-cefc-f2b6-8490ea2c3e04" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment" xlink:label="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_90abc8df-a70a-7c23-5fff-9b3d9bc98c9b" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_fb013d5f-7e0c-1a40-5a42-42bd8c3a1d51" xlink:to="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_90abc8df-a70a-7c23-5fff-9b3d9bc98c9b" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfDebt" xlink:label="loc_us-gaap_ProceedsFromRepaymentsOfDebt_f732f5ac-85f7-4239-e278-5eff75c4f396" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_fb013d5f-7e0c-1a40-5a42-42bd8c3a1d51" xlink:to="loc_us-gaap_ProceedsFromRepaymentsOfDebt_f732f5ac-85f7-4239-e278-5eff75c4f396" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_6d7b73b6-0db7-23f7-377e-417fa8fc8e27" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_46b895b2-8ff5-9e37-d4c3-5b75649cbcba" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_6d7b73b6-0db7-23f7-377e-417fa8fc8e27" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProceedsFromLinesOfCredit" xlink:label="loc_us-gaap_ProceedsFromLinesOfCredit_45b97048-e301-0f1a-3463-4d9851d739ca" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_6d7b73b6-0db7-23f7-377e-417fa8fc8e27" xlink:to="loc_us-gaap_ProceedsFromLinesOfCredit_45b97048-e301-0f1a-3463-4d9851d739ca" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProceedsFromBankDebt" xlink:label="loc_us-gaap_ProceedsFromBankDebt_99d5f10e-6def-c03f-fd71-2db9b9cd5235" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_6d7b73b6-0db7-23f7-377e-417fa8fc8e27" xlink:to="loc_us-gaap_ProceedsFromBankDebt_99d5f10e-6def-c03f-fd71-2db9b9cd5235" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProceedsFromLifeInsurancePolicies" xlink:label="loc_us-gaap_ProceedsFromLifeInsurancePolicies_3125f193-f13c-3420-f6b4-447defaff5aa" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_6d7b73b6-0db7-23f7-377e-417fa8fc8e27" xlink:to="loc_us-gaap_ProceedsFromLifeInsurancePolicies_3125f193-f13c-3420-f6b4-447defaff5aa" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RepaymentsOfLinesOfCredit" xlink:label="loc_us-gaap_RepaymentsOfLinesOfCredit_a3cc5f0d-b161-eb8f-cc4a-2faebb7fd65f" xlink:type="locator" />
    <calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_6d7b73b6-0db7-23f7-377e-417fa8fc8e27" xlink:to="loc_us-gaap_RepaymentsOfLinesOfCredit_a3cc5f0d-b161-eb8f-cc4a-2faebb7fd65f" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RepaymentsOfDebt" xlink:label="loc_us-gaap_RepaymentsOfDebt_a09b8b17-dfd0-6f65-bc95-ce08e5c4af2c" xlink:type="locator" />
    <calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_6d7b73b6-0db7-23f7-377e-417fa8fc8e27" xlink:to="loc_us-gaap_RepaymentsOfDebt_a09b8b17-dfd0-6f65-bc95-ce08e5c4af2c" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInOutstandingChecksFinancingActivities" xlink:label="loc_us-gaap_IncreaseDecreaseInOutstandingChecksFinancingActivities_0d9be28a-7bc8-6ab4-c022-c2fb63c000fa" xlink:type="locator" />
    <calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_6d7b73b6-0db7-23f7-377e-417fa8fc8e27" xlink:to="loc_us-gaap_IncreaseDecreaseInOutstandingChecksFinancingActivities_0d9be28a-7bc8-6ab4-c022-c2fb63c000fa" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RepaymentsOfLongTermCapitalLeaseObligations" xlink:label="loc_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_df72e954-88d7-e3c0-b2e2-1af33eeb6239" xlink:type="locator" />
    <calculationArc order="7" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_6d7b73b6-0db7-23f7-377e-417fa8fc8e27" xlink:to="loc_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_df72e954-88d7-e3c0-b2e2-1af33eeb6239" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_a47fcff7-f524-1c67-2ba7-1907ae376b7b" xlink:type="locator" />
    <calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_6d7b73b6-0db7-23f7-377e-417fa8fc8e27" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_a47fcff7-f524-1c67-2ba7-1907ae376b7b" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_2d132af0-7f39-d203-f615-6551f8d2a6a7" xlink:type="locator" />
    <calculationArc order="9" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_6d7b73b6-0db7-23f7-377e-417fa8fc8e27" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_2d132af0-7f39-d203-f615-6551f8d2a6a7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_21149c4c-60e9-1f3a-82d3-665a83a5c4f2" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_46b895b2-8ff5-9e37-d4c3-5b75649cbcba" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_21149c4c-60e9-1f3a-82d3-665a83a5c4f2" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.mfri.com/role/ConsolidatedStatementsOfComprehensiveLossIncomeUnaudited" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_375e0d17-4818-4239-a370-aada0b6ca8eb" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_2a2aa755-cf10-d76f-d028-d3680488ca4e" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_375e0d17-4818-4239-a370-aada0b6ca8eb" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_2a2aa755-cf10-d76f-d028-d3680488ca4e" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_7fd63b12-05a5-a417-a943-a2dd6e58d717" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_2a2aa755-cf10-d76f-d028-d3680488ca4e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_7fd63b12-05a5-a417-a943-a2dd6e58d717" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax_793675f9-cf2a-0af6-a7c2-31a24aaf7ef7" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_2a2aa755-cf10-d76f-d028-d3680488ca4e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax_793675f9-cf2a-0af6-a7c2-31a24aaf7ef7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_faecc408-4bea-6e13-83bd-71b4c2ddf64c" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_375e0d17-4818-4239-a370-aada0b6ca8eb" xlink:to="loc_us-gaap_NetIncomeLoss_faecc408-4bea-6e13-83bd-71b4c2ddf64c" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.mfri.com/role/ConsolidatedStatementsOfOperationsUnaudited" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_faecc408-4bea-6e13-83bd-71b4c2ddf64c" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeLossFromContinuingOperations" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperations_3b39b5ab-da99-c64e-0b26-a881dcc891bb" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_faecc408-4bea-6e13-83bd-71b4c2ddf64c" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperations_3b39b5ab-da99-c64e-0b26-a881dcc891bb" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_cc64ed8f-51e0-4a92-b0c8-acb3ad13358b" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperations_3b39b5ab-da99-c64e-0b26-a881dcc891bb" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_cc64ed8f-51e0-4a92-b0c8-acb3ad13358b" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_72b2c986-6e1a-bdde-cc72-888b0df562b9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_cc64ed8f-51e0-4a92-b0c8-acb3ad13358b" xlink:to="loc_us-gaap_OperatingIncomeLoss_72b2c986-6e1a-bdde-cc72-888b0df562b9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaap_GrossProfit_77a77c8a-8a13-919c-6d50-d35f60384ab0" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_72b2c986-6e1a-bdde-cc72-888b0df562b9" xlink:to="loc_us-gaap_GrossProfit_77a77c8a-8a13-919c-6d50-d35f60384ab0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SalesRevenueNet" xlink:label="loc_us-gaap_SalesRevenueNet_0863786b-6bf9-966f-db7b-d5636f830397" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_77a77c8a-8a13-919c-6d50-d35f60384ab0" xlink:to="loc_us-gaap_SalesRevenueNet_0863786b-6bf9-966f-db7b-d5636f830397" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CostOfGoodsSold" xlink:label="loc_us-gaap_CostOfGoodsSold_f60bb493-e4bb-89cc-3640-4febfc5d9f27" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_77a77c8a-8a13-919c-6d50-d35f60384ab0" xlink:to="loc_us-gaap_CostOfGoodsSold_f60bb493-e4bb-89cc-3640-4febfc5d9f27" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaap_OperatingExpenses_ee2bd36d-150a-7303-38c4-eb755f792210" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_72b2c986-6e1a-bdde-cc72-888b0df562b9" xlink:to="loc_us-gaap_OperatingExpenses_ee2bd36d-150a-7303-38c4-eb755f792210" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_7c6d12de-ee49-8fea-ba36-2f44ccb8dae4" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_ee2bd36d-150a-7303-38c4-eb755f792210" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_7c6d12de-ee49-8fea-ba36-2f44ccb8dae4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SellingExpense" xlink:label="loc_us-gaap_SellingExpense_f01cb33d-d3de-ab37-d949-1731a2952025" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_ee2bd36d-150a-7303-38c4-eb755f792210" xlink:to="loc_us-gaap_SellingExpense_f01cb33d-d3de-ab37-d949-1731a2952025" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_445b78c2-4bbd-7384-3692-4301301d1ab8" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_cc64ed8f-51e0-4a92-b0c8-acb3ad13358b" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_445b78c2-4bbd-7384-3692-4301301d1ab8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InterestIncomeExpenseNet" xlink:label="loc_us-gaap_InterestIncomeExpenseNet_a12c4ccc-a50c-b165-5045-f74bbea2c47f" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_cc64ed8f-51e0-4a92-b0c8-acb3ad13358b" xlink:to="loc_us-gaap_InterestIncomeExpenseNet_a12c4ccc-a50c-b165-5045-f74bbea2c47f" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_3a83e980-c99b-5657-79fd-300643b7fa11" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperations_3b39b5ab-da99-c64e-0b26-a881dcc891bb" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_3a83e980-c99b-5657-79fd-300643b7fa11" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax" xlink:label="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_2f6b4a8b-da4d-a869-0f48-7f17c52d0fbe" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_faecc408-4bea-6e13-83bd-71b4c2ddf64c" xlink:to="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_2f6b4a8b-da4d-a869-0f48-7f17c52d0fbe" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.mfri.com/role/ConsolidatedStatementsOfOperationsUnauditedCalc2" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/ConsolidatedStatementsOfStockholdersEquity" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/Debt" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/DebtDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/EarningsPerShare" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/EarningsPerShareDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_72491ff2-4ebf-cd12-4650-465a32156ef1" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_0f40104d-c144-6dd5-056b-98f95661c23e" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_72491ff2-4ebf-cd12-4650-465a32156ef1" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_0f40104d-c144-6dd5-056b-98f95661c23e" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_dddad97c-8f42-a8ee-eba7-7c0400dcdc14" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_72491ff2-4ebf-cd12-4650-465a32156ef1" xlink:to="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_dddad97c-8f42-a8ee-eba7-7c0400dcdc14" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.mfri.com/role/EarningsPerShareTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/EntityInformationDocument" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/FairValueOfFinancialInstruments" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/FairValueOfFinancialInstrumentsDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/ImpairmentOfLongLivedAssetsDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/ImpairmentOfLongLivedAssetsNotes" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/ImpairmentOfLongLivedAssetsTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/IncomeTaxes" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/IncomeTaxesIncomeTaxesDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/InterestExpenseNet" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/InterestExpenseNetDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InterestIncomeExpenseNet" xlink:label="loc_us-gaap_InterestIncomeExpenseNet_a12c4ccc-a50c-b165-5045-f74bbea2c47f" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_cefe1779-647b-11ee-28a9-2740d86c056b" xlink:type="locator" />
    <calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestIncomeExpenseNet_a12c4ccc-a50c-b165-5045-f74bbea2c47f" xlink:to="loc_us-gaap_InterestExpense_cefe1779-647b-11ee-28a9-2740d86c056b" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InterestIncomeOther" xlink:label="loc_us-gaap_InterestIncomeOther_69404145-0837-5cc4-7c6a-897dd211ee07" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestIncomeExpenseNet_a12c4ccc-a50c-b165-5045-f74bbea2c47f" xlink:to="loc_us-gaap_InterestIncomeOther_69404145-0837-5cc4-7c6a-897dd211ee07" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.mfri.com/role/InterestExpenseNetTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/InvestmentInJointVentureDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/InvestmentInJointVentureNotes" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/InvestmentInJointVentureTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/OtherIntangibleAssetsWithDefiniteLivesDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/OtherIntangibleAssetsWithDefiniteLivesNotes" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/OtherIntangibleAssetsWithDefiniteLivesTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/RecentAccountingPronouncements" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/RecentAccountingPronouncementsDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/ReclassificationsDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/ReclassificationsNotes" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/ReclassificationsTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/StockBasedCompensation" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/StockBasedCompensationDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/StockBasedCompensationFairValueAssumptionsDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/StockBasedCompensationRestrictedStockDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/StockBasedCompensationStockBasedCompensationExpenseDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/StockBasedCompensationStockCompensationTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/TreasuryStockShareRepurchaseProgramDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/TreasuryStockShareRepurchaseProgramNotes" xlink:type="extended" />
  <calculationLink xlink:role="http://www.mfri.com/role/TreasuryStockShareRepurchaseProgramTables" xlink:type="extended" />
</linkbase>
