... 3.standard: ASTM A53/106 234 4.material:WPB GR.B TypeApplicationStandardMaterialalloy steel pipeit is used in petroleum,chemical,electric power ... order to transmit the he oxygen,water and oilAPI 5LA,B,X42,X46,X52,X56,X60,X65,X70,X80ERW STEEL PIPEUsed ...