... 316,304L,304 2.Stanndard:ANSI,BS,DIN,UNI,JIS,GB 3.Use:water supply,chemical,petroleum industry 1.NameStainless steel ... welding neck flange2.Standard:GB14976-2002, GB13296-2007, JIS, AISI, DIN, ... Standards: ANSI, BS, DIN, UNI, JIS, GB, Non-standard etc.or as customers' drawings for special use. 3. Materials: Stainless steel4. Pressure ...