... .stainless steel petroleum pipe tube Hebei Shuimiao Pipe fittings Manufacture Co., Ltd stainless steel petroleum pipe tube sizestainless steel petroleum pipe tubeWelded: ... JISB2313, BS, GB, ISOmaterialCarbon steel (ASTM A234WPB,A234WPC,A420WPL6, ect)Stainless steel(ASTM A403 WP304,304L,316, ... Alloy steel(ASTM A234 WP12,WP11,WP22,WP5,WP9,WP91, ect)qualificationISO9001:2008 ,ISO 14001 OHSAS18001 , API , ...