... /P110 Tubing is used in extracting petroleum& natural gas ,casing pipe service as wall of wellAPI 5LPSL 1A25/A/B,X42 ... ,X65,X70For the purpose of transportation of gas, water, oil in oil &gas industryPSL 2B/X42,X46,X52,X60,X65,X70,X80ASTM ... conveying equipmentsASTM A192For manufacture wall panel, re heater and steam pipe line of boilersDIN 1629ST52 STS49Used for the purpose of transportation ...