... Square Flange, Lwnrf (Ff), Thrf (Ff) Facing Method: rust preventing oil, spray paint (black, yellow), hot galvanization, cold galvanization or colored ... of pipe line; easy to seal pipe line, such as oil, petroleum, gas, chemical industry, nuclear power station, water and ... other countries in the world. Packing: Using Veneer Case or Plywood Case Of Outside, Linoleum And Plastic Cloth Of Inside Dampproof ...