... .2.Reasonable price.3.Excellent quality.4.Various size.Stainless steel flanges, pipe fittingsGrade: 316L, 316, 304L, 304Stanndard:ANSI,BS, ... 5K, 10K, 16K and 20K 5. Type: Welding Neck6. Face treatment: Transparent oil, rust-proof oil, hot galvanized7. Process: ... Applicaton: Ships, petrochemical, medical equipment, piping installation link Stainless Steel Welding Neck Flange-Pipe connecting parts