... JB, GB, HG, UNI, API CS,SS... oil pipe and flang Technics: Forged Size: from 1/2 ... Lwnrf (Ff), Thrf (Ff) Facing Method: rust preventing oil, spray paint (black, yellow), hot galvanization, cold ... Carbon Steel Flange Non Standard: According to the drawing size from 10mm to 5000mm, weight from 0 ... line; easy to seal pipe line, such as oil, petroleum, gas, chemical industry, nuclear power station ...