... , BS, JIS, EN, JB, GB, HG, UNI, API water piping flang Technics: Forged Size: from 1/2 to 200 ... preventing oil, spray paint (black, yellow), hot galvanization, cold galvanization or colored electroplate, powder coating and so on. Types ... as oil, petroleum, gas, chemical industry, nuclear power station, water and nuclear power construction, shipbuilding, food manufacturing, construction, shipbuilding, ...