1,production : bend 2,certificate:ISO9001-2000, CE 3,standard:ANSI/DIN/GB/JIS 4,enough storage The products ... 10- Sch xxsApplicable standardASME , ASTM, MSS ,JIS , DIN , EN,MaterialCarbon steel :carbon steelConnectionButt-weldingApplications rangsuch as oil, chemical industry, water conservancy, electric ...