copper steel flang Size: from 1/2 to 200 inch ... BS, JIS, EN, JB, GB, HG, UNI CS,SS... copper steel flang Technics: Forged Size: from 1/2 to 200 ... certification. Inspection: Factory In-House Or Third Party Shape: Equal Usage: connecting pipe line and keep its leakproofness; convenient for ... to separate and check the situation of pipe line; easy to seal pipe line, such as oil, petroleum, gas, chemical ...