... Tubing is used in extracting petroleum& natural gas ,casing pipe service as wall of wellAPI ... ,X70For the purpose of transportation of gas, water, oil in oil &gas industryPSL 2B/X42,X46,X52,X60, ... BIt is used for conveying water ,petroleum ,gas and other common fluids,ASTM A179For tubing heat ... 1629ST52 STS49Used for the purpose of transportation of gas, water, or other constructionASTM A219 A335A210-C ...