1.40 years experience in forging flange. 2.word-class facilities 3.riched engineers 4.design ... DIN,GB etc.2. TypeSlip On Flange, Flat Face Flange, Socket Welding Flange, Blind Flange, Non-standard flange etc.3. Size 1/2-78 ... , chemical, power, gas, water, line pipe, heat exchanger, shipbuilding, construction, etc.6. Production processraw material--cutting--heating--forging--heat treatment-- ...