... for Gas CylindersGrade:34Mn2V,30CrMo,35CrMo,45.8.Application1),API SPCE 5L For the purpose of transportation of ... ,water,oill in oil&gas industry.2), API SPEC 5CT Tubing is used in extracting petroleum & natural gas. casing ... of boiler,water&petroleum.4), ASTM A53 It is used for conveying water,petrolem,gas and other common fluids ... ,reheater,superheater and steam pipeline of boilers. api 5l pipe line