... :API,ISO9001,PE Product Introduction Of Carbon Steel Elbow For Pipes1. Material: Carbon steel (seam or seamless), stainless steel, ... GB/T12459,GB/T13401,ASME B16.91 USE: Petroleum, chemical, power, gas, metallurgy, shipbuilding, construction, etc. NAME:180 DEGREE ... GB/T12459,GB/T13401,ASME B16.9 USE: Petroleum, chemical, power, gas, metallurgy, shipbuilding, construction, etc. Production Equipment Of ...