name: steel pipe material: carbon steel A234 WPB ANSI B16.9 standard: ASTM, ASME, GB, JIS,DIN, BS ISO9001/9002 ... 1/2''--24'',Butt Welding:26''--72'')3MaterialCarbon steel,Stainless steel,Alloy Steel4Material GradesA234 WPB,A106,A53,API 5L, ... STD,SCH XS,SCH XXSClass 150----Class 60009StandardASME,JIS,DIN,GB,etc10CertificateISO9001 ISO14001 CE11SurfaceBlack painted, Galvanized,3PE12Placeof OrignCangzhou ...