Quarterly report pursuant to Section 13 or 15(d)

Revenues - Schedule of Disaggregated Revenues by Source (Details)

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Revenues - Schedule of Disaggregated Revenues by Source (Details) - USD ($)
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Disaggregation of Revenue [Line Items]    
Net sales $ 84,803,832 $ 58,480,602
Storage tank and vessel    
Disaggregation of Revenue [Line Items]    
Net sales 9,828,955 5,775,772
Seamless carbon steel pipe and tube    
Disaggregation of Revenue [Line Items]    
Net sales 8,586,505 8,432,613
Stainless steel pipe    
Disaggregation of Revenue [Line Items]    
Net sales 45,995,384 31,283,862
Galvanized pipe    
Disaggregation of Revenue [Line Items]    
Net sales 6,692,235 0
Specialty chemicals    
Disaggregation of Revenue [Line Items]    
Net sales $ 13,700,753 $ 12,988,355