... Forged flanges 1 Certificates: ISO and TUV 2 Standard: ASME, ANSI, JIS, DIN, UNI, BS, 3 Material: ... construction water supply, fire protection, hot and cold water supply, food and chemical industry, hospital, hotel, workshops, ... pipeline system, heating supply, gas pipeline system, and industrial petroleum pipeline system etc. Advantages: Strong ... strong resistance against aging and hygienic. DIN flange