... name : seamless stainless steel pipe size:4"*sch80 material:304 series standard: GB,DIN,JiSG,DN and so on Feture:1.Commodity ... ,310,310S,317L,321,347,DuplexS.S.S31500,S31803,S3275O5.Standard:ASTM(ASME)A213/SA312/A269/GB/T14975(6)-2002,GB13296 ...