name: pipe material: carbon steel A234 WPB ANSI B16.9 standard: ASTM, ASME, GB, JIS,DIN, BS ISO9001/9002 ItemCatalogDescription1ProductsFlange, ... ''--72''(Seamless :1/2''--24'',Butt Welding:26''--72'')3MaterialCarbon steel,Stainless steel,Alloy Steel4Material GradesA234 WPB,A106,A53,API 5L,A105,A333Cr6 ... ,A333Cr3 etcA234 WP11/12/5/9/91,A182 F12/P11/F22/F5,A335 P12/P11 etcA403 ...