... seamless steel pipe&tube specification: Product NameSeamless steel pipe&tube OD1/8"-20"Wall ThicknessSch10-SchXXSMaterialASTM A153-A,ASTM A53-A/B,ASTM A106-A/B, ... ASTM A179-C,ASTM A214-C,ASTM A192,ASTM A226,ASTM A315-B, ... A210-C ,ASTM A283-D,ASME SA106 Grade B,and so on.StandardANSI,ASME GB, SH,HG ... gradePayment TermL/C T/T AISI 321stainless seamless steel pipe&tube