oil pipe and flang Size: from 1/2 to 200 ... , JIS, EN, JB, GB, HG, UNI, API CS,SS... oil pipe and flang Technics: Forged Size: from 1/2 to ... Flange, Lwnrf (Ff), Thrf (Ff) Facing Method: rust preventing oil, spray paint (black, yellow), hot galvanization, cold galvanization or colored ... of pipe line; easy to seal pipe line, such as oil, petroleum, gas, chemical industry, nuclear power station, water and ...