... requirement.Surface treatment: Black painting/coating, black rust-proof oil, hot galvanizing, 3PE, epoxy coating.Packing: Plastic cap for ... 2008Inspection:Accept any third party’s inspection.Application range:Petroleum, chemical, power, gas, stream, metallurgy, ship building, liquid, ... 2.Anti-corrosion and high-temperature resistant with black painting; 3.All the production process are made under ...