... JIS,etc.Surface Treatment Transparent oil, rust-proof black oil or hot galvanized.Usage:Petroleum, chemical, power, gas, metallurgy, ... shipbuilding, construction, etcOthersOEM service providePacking Wooden Cases or wooden pallet or as requestDelivery time10-50days About UsHebei Jinsheng Pipe Fittings ... Factory Certificate Test Equipment Production Equipment asme b 16.47 carbon steel forged flange