1.pipe line 2.Mainly export to Southeast Asia,Africa,Mid ... SPCE 5L For the purpose of transportation of gas,water,oill in oil&gas industry.2), API SPEC ... the purpose of the pipeline project of boiler,water&petroleum.4), ASTM A53 It is used for ... conveying water,petrolem,gas and other common fluids.5), ASTM ... ,superheater and steam pipeline of boilers. seamless pipe line