... , DIN 3202 F4-F5, JIS B2002, ANSI B16.104) Flanged end: BS4504, DIN 2532, JIS B2212, ANSI B16.10/ANSI B16 ... ,Other whorl,Welding,Bear and insert welding.3.Design feature: Single-disc,Double-disc.4.Sealing formation:Hard alloy,Alloy steel ... ,API600 API602.The products feature a reasonable structure,reliable seal,good performance and nice modeling.2.Co hard alloy welded sealing surface ...