high pressure flang Size: from 1/2 to 200 inch ( ... JIS, EN, JB, GB, HG, UNI, API CS,SS... high pressure flang Technics: Forged Size: from 1/2 to 200 inch ... Usage: connecting pipe line and keep its leakproofness; convenient for replacing pipe line; easy to separate and check the ... easy to seal pipe line, such as oil, petroleum, gas, chemical industry, nuclear power station, water and nuclear power ...