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Revenue Recognition (Tables)
9 Months Ended
Sep. 30, 2021
Revenue from Contract with Customer [Abstract]  
Schedule of 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 September 30,Nine Months Ended September 30,
(in thousands)2021202020212020
Fiberglass and steel liquid storage tanks and separation equipment$189 $538 881 4,994 
Heavy wall seamless carbon steel pipe and tube10,398 5,436 29,347 18,408 
Stainless steel pipe and tube48,331 37,231 134,632 120,265 
Galvanized pipe and tube11,209 3,875 28,578 16,094 
Specialty chemicals16,055 12,186 45,609 40,338 
Net sales$86,182 $59,266 $239,047 $200,099