1.40 years experience in forging flange. 2.word-class facilities 3.riched engineers 4.design ... , SS400, SF440 RST37.2,S235JRG2,P250GH,C22.8 etc.5. Used forPetroleum, chemical, power, gas, water, line pipe, heat exchanger, ... shipbuilding, construction, etc.6. Production processraw material--cutting--heating--forging--heat treatment--marching--inspection.7. Inspection factory in-house self ...