... pipe, valves and other equipment to form a pipe work System. Suitable for standard – ASA/ANSI (USA), PN/DIN(EUROPEAN), BS10 ... ), API, AWWA,, MSS, NF in various materialFlange for pipe work system is providing easy access for cleaning, inspection, or modification . Flanges ... cases or as customers request. Where can I buy the high quality flange?Ring Flange