... , JIS, EN, JB, GB, HG, UNI, API CS,SS... water pipe flang Technics: Forged Size: from 1/2 to 200 inch ... ; easy to separate and check the situation of pipe line; easy to seal pipe line, such as oil, petroleum, gas, chemical industry ... or Plywood Case Of Outside, Linoleum And Plastic Cloth Of Inside Dampproof, or other methods according to the requirements of our ...