... or as per customers requirement7.Elbow Applications range: Petroleum, chemical, power, gas, metallurgy, shipbuilding.construction,etc8.Elbow Min Order Quantity:According ... under the ISO9001 Seamless ,welded ,but-welding,forged,casting thread Socket -weld Elbow -- ASTM A 234 WPB,WPC,WPH stainless steel ...