... , Lwnrf (Ff), Thrf (Ff) Facing Method: rust preventing oil, spray paint (black, yellow), hot galvanization, cold galvanization or ... pipe line; easy to seal pipe line, such as oil, petroleum, gas, chemical industry, nuclear power station, ... power construction, shipbuilding, food manufacturing, construction, shipbuilding, paper making, medicine, and other industries. Main Market: United Kingdom, America ...