ISO9001-2008 have be passed. Carbon Steel and Stainless Steel. seamless pipe fitting StandardSizeWall Thickness: TypeMaterialASME B16.9DN15-DN1400SCH10-SCH160,STD,XS,XXS,SGP.Elbow,Reducer,Tee, Cap.ASTM A234 WPB,ST35.8,ST37,SS304,304L,316,316L.ASME B16.28DN15-DN1400SCH10-SCH160,STD,XS,XXS,SGP. DIN 2605DN15-DN1400SCH10-SCH160,STD,XS,XXS,SGP.DIN 2617DN15-DN1400SCH10-SCH160,STD,XS,XXS,SGP.DIN ...