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  <xs:element id="msa_NotesLoansandFinancingReceivableInsuranceCompaniesAdditions" abstract="false" name="NotesLoansandFinancingReceivableInsuranceCompaniesAdditions" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msa_DisposalGroupIncludingDiscontinuedOperationNotesLoansAndFinancingReceivableNetInsuranceCompaniesCurrent" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationNotesLoansAndFinancingReceivableNetInsuranceCompaniesCurrent" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msa_RestructuringChargesbeforeAdjustments" abstract="false" name="RestructuringChargesbeforeAdjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msa_AdjustedEBITDAPercentage" abstract="false" name="AdjustedEBITDAPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="msa_ProductLiabilityAccrualPeriodBenefit" abstract="false" name="ProductLiabilityAccrualPeriodBenefit" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msa_SummaryOfInsuranceReceivableBalancesAndActivityRelatedToProductLiabilityLossesTableTextBlock" abstract="false" name="SummaryOfInsuranceReceivableBalancesAndActivityRelatedToProductLiabilityLossesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="msa_DisposalGroupIncludingDiscontinuedOperationProductLiabilityCurrent" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationProductLiabilityCurrent" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesNoncurrent" abstract="false" name="NotesLoansandFinancingReceivableNetInsuranceCompaniesNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msa_ProceedsFromCollectionOfInsuranceAndNotesReceivable" abstract="false" name="ProceedsFromCollectionOfInsuranceAndNotesReceivable" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msa_SeniorNotesPayableThroughTwoThousandThirtyOneThreePointFourPercentageMemberMember" abstract="true" name="SeniorNotesPayableThroughTwoThousandThirtyOneThreePointFourPercentageMemberMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="msa_CapitalStockDisclosureTableTextBlock" abstract="false" name="CapitalStockDisclosureTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="msa_DebtInstrumentCovenantFixedChargesCoverageRatioMinimum" abstract="false" name="DebtInstrumentCovenantFixedChargesCoverageRatioMinimum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="msa_NumberOfGeographicalSegments" abstract="false" name="NumberOfGeographicalSegments" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="msa_SharebasedCompensationArrangementbySharebasePaymentAwardFairValueAssumptionsStockBetaDailyPriceDataPeriod" abstract="false" name="SharebasedCompensationArrangementbySharebasePaymentAwardFairValueAssumptionsStockBetaDailyPriceDataPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="msa_PortableInstrumentsMember" abstract="true" name="PortableInstrumentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="msa_DisposalGroupIncludingDiscontinuedOperationInsuranceSettlementsReceivableNoncurrent" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationInsuranceSettlementsReceivableNoncurrent" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msa_SingleIncidentMember" abstract="true" name="SingleIncidentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="msa_RestrictedAndPerformanceStockAwardsMember" abstract="true" name="RestrictedAndPerformanceStockAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="msa_CumulativeTraumaMember" abstract="true" name="CumulativeTraumaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="msa_JointVentureByRQInsuranceHoldingsLtdAndObraCapitalIncMember" abstract="true" name="JointVentureByRQInsuranceHoldingsLtdAndObraCapitalIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="msa_FederalFundsOpenRateMember" abstract="true" name="FederalFundsOpenRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="msa_PercentageOfTargetAwardBasedOnAchievingTargetedTotalShareholderReturnBasedOnWhichFinalNumberOfSharesToBeIssuedForPerformanceStockUnits" abstract="false" name="PercentageOfTargetAwardBasedOnAchievingTargetedTotalShareholderReturnBasedOnWhichFinalNumberOfSharesToBeIssuedForPerformanceStockUnits" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="msa_NotesLoansandFinancingReceivableInsuranceCompaniesProceeds" abstract="false" name="NotesLoansandFinancingReceivableInsuranceCompaniesProceeds" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msa_FallProtectionMember" abstract="true" name="FallProtectionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="msa_NotesLoansAndFinancingReceivableInsuranceCompaniesDivestitureOfBusiness" abstract="false" name="NotesLoansAndFinancingReceivableInsuranceCompaniesDivestitureOfBusiness" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msa_MonteCarloApproachMember" abstract="true" name="MonteCarloApproachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="msa_DisposalGroupNotDiscontinuedOperationGainLossOnDisposalIncludingTaxEffect" abstract="false" name="DisposalGroupNotDiscontinuedOperationGainLossOnDisposalIncludingTaxEffect" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msa_SharebasedCompensationArrangementbySharebasePaymentAwardFairValueAssumptionsAverageClosingPriceUsedtoCalculateExpectedDividendRatePeriod" abstract="false" name="SharebasedCompensationArrangementbySharebasePaymentAwardFairValueAssumptionsAverageClosingPriceUsedtoCalculateExpectedDividendRatePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="msa_EmployeeStockPurchasePlanMember" abstract="true" name="EmployeeStockPurchasePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesCurrent" abstract="false" name="NotesLoansandFinancingReceivableNetInsuranceCompaniesCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msa_LineOfCreditFacilityAccordionFeatureAmount" abstract="false" name="LineOfCreditFacilityAccordionFeatureAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msa_AmortizationOfAcquiredFiniteLivedIntangibleAssets" abstract="false" name="AmortizationOfAcquiredFiniteLivedIntangibleAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msa_OvernightBankFundingRateMember" abstract="true" name="OvernightBankFundingRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="msa_DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperations" abstract="false" name="DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperations" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msa_DamagesFromProductSubstancesMember" abstract="true" name="DamagesFromProductSubstancesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="msa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceAdjustmentInPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceAdjustmentInPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="msa_BusinessCombinationContributedCashAndCashEquivalents" abstract="false" name="BusinessCombinationContributedCashAndCashEquivalents" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msa_TermLoanFacility2023Member" abstract="true" name="TermLoanFacility2023Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="msa_NotesLoansandFinancingReceivableNetInsuranceCompanies" abstract="false" name="NotesLoansandFinancingReceivableNetInsuranceCompanies" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msa_AmericasSegmentMember" abstract="true" name="AmericasSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="msa_ScheduleofSharebasedPaymentAwardEquityInstrumentsOtherthanOptionsValuationAssumptionsTableTextBlock" abstract="false" name="ScheduleofSharebasedPaymentAwardEquityInstrumentsOtherthanOptionsValuationAssumptionsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
</xs:schema>
