... 3.Use:water supply,chemical,petroleum industry 1.NameStainless steel welding neck flange2.Standard:GB14976-2002, GB13296-2007, JIS, AISI, ... Various size.Stainless steel flanges, pipe fittingsGrade: 316L, 316, 304L, 304Stanndard:ANSI,BS,DIN,UNI,JIS,GN,etcType:Welding neck flangeProduct name ... and PN64 JIS 5K, 10K, 16K and 20K 5. Type: Welding Neck6. Face treatment: Transparent oil, rust-proof oil, hot ...