ANSI B16.5 CLASS150 WELDING NECK FLANGE Material: A105 Processing technic: forging Coating: black,yellow paint Product ... ) RTJ(ring type join) About the companyHEBEI XINFEG HIGH-PRESSURE FLANGE AND PIPE FITTING CO., LTD, founded in 1988, specializes in ... are welding neck , slip-on , blind, plate, socket welding, lap joint and loose flanges, elbows of short and long redius in ...