STAINLESS SEAMLESS STEEL PIPE CARGOSS SEAMLESS PIPEMATERIALTP304, TP304L, TP 304H, TP310S, TP316, TP 316L, TP317L, TP316Ti, ... -2002 GB14976-2002,GB5310-1995 GB/T-21833etc.ASTM A213 ASTM A249 ASTM A269 ASTM A312, ASTM A789,ASTM A790 ;GOST 9941 ,GOST 9940;DIN 17456 ... ,WATER CONSERVANCY,POWER ELECTRICITY,CHEMISTRY,PHARMACY AND BIOLOGY. STAINLESS STEEL PIPE