... JB, GB, HG, UNI, API CS,SS... wind power flang Technics: Forged Size: from 1/2 to 200 inch ... Thrf (Ff) Facing Method: rust preventing oil, spray paint (black, yellow), hot galvanization, cold galvanization or colored electroplate, powder ... as oil, petroleum, gas, chemical industry, nuclear power station, water and nuclear power construction, shipbuilding, food manufacturing, construction, shipbuilding, ...