... ,alloy steel,A234 WPB,WPC,WP11 3.standard:ASME/JIS/DIN/EN/ST/GOST 4.Got the ISO 9001 A106 steel ERW ... carbon, alloy, stainless steel,duplex,as per ASTM, ANSI, JIS, DIN and GB standards. 2.WH:sch 10---SCH160, XXS3.material ... steel4.the price :competitive lower than other manufacturersower5.sdandard:JIS DIN GB ASME According to customers' requirement6.certification:ISO9001:2000, CO ...