... :2008,TUV 2010, PED20 Weld Neck Carbon Steel Flange:1.Type:Carbon Steel Flange2.Material:Carbon steel3.Certification:ISO9001:2008,TUV 2010, PED20 ... MainMaterialStainless steel,Carbon steel,Alloy steelWN/BL/PL/SO/SW/THANSIANSI B16.5 ... ~9125-88 GB/T13402-92GOSTGOST 12820-80 12821-80SpecificationClass150#,300#,400#,600#,900#,1500#,2500#,PN0.25,PN0.6,PN1.0 ...