... beveled EndSurface treadmentBlack painting , Anti-rust varnish, Anti-rust oil , Hot-galvanized , Cold galvanized ,3PE, EPOXY coating, ... customers can paint mark on the steel pipeapplicationsOil, natural gas, chemical industry, power plants, food manufacturing, construction, ... manufacture ship, paper, medical drug use power, metallurgy,, oil drilling, boilers and pressure vessel of medium and low ...