fixed flang Size: from 1/2 to 200 inch (DN15-DN6000) ... , DIN, BS, JIS, EN, JB, GB, HG, UNI CS,SS... fixed flang Technics: Forged Size: from 1/2 to 200 inch ... : Equal Usage: connecting pipe line and keep its leakproofness; convenient for replacing pipe line; easy to separate and check the situation ...