stainless steel wn flange 1) TUV and ISO 9001 2) DIN/ EN1092/ ANSI B16.5/ UN /BS 3) DN15~~DN3600 ,Hebei Kunpeng Pipeline & Container Complete Set Equipment Co.,LtdProductsAll kinds of Pipe FittingsStandardASTM , ANSI, DIN, GB, JB/TWall ThincknessSCH20-SCH160MaterialS304 S316ApplicationNatural gas , petroleum, chemical industry , electric power , metallurgy , thermodynamic fields, water supply ...