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Revenues (Tables) | 6 Months Ended
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Jun. 30, 2020
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue by Product Group | The following table presents the Company's revenues, disaggregated by product group. Substantially all of the Company's revenues are derived from contracts with customers where performance obligations are satisfied at a point-in-time.
| Three Months Ended June 30, |  | Six Months Ended June 30,
(in thousands) | 2020 |  | 2019 |  | 2020 |  | 2019
Fiberglass and steel liquid storage tanks and separation equipment | $ | 1,038 |  |  | $ | 10,247 |  |  | $ | 4,456 |  |  | $ | 20,076 |
Heavy wall seamless carbon steel pipe and tube | 5,658 |  |  | 6,703 |  |  | 12,972 |  |  | 15,289 |
Stainless steel pipe and tube | 39,306 |  |  | 41,310 |  |  | 83,034 |  |  | 87,305 |
Galvanized pipe and tube | 6,016 |  |  | 6,243 |  |  | 12,219 |  |  | 12,936 |
Specialty chemicals | 14,118 |  |  | 14,275 |  |  | 28,152 |  |  | 27,976 |
Net sales | $ | 66,136 |  |  | $ | 78,778 |  |  | $ | 140,833 |  |  | $ | 163,582 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 + Details
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