name: pipe material: carbon steel A234 WPB ANSI B16.9 standard: ASTM, ASME, GB, JIS, ... ''--72''(Seamless :1/2''--24'',Butt Welding:26''--72'')3MaterialCarbon steel,Stainless steel,Alloy Steel4Material GradesA234 WPB,A106,A53,API 5L,A105,A333Cr6 ... natural gas industry 5. Chemistry industry 6. Electric industry JIS stainless steel pipe