... steel pipe production line from size 1/4"-5" OD pipe.-, Hot rolled from size 6"-16" OD pipe, ... X52,X56,X60,X65,X70,L245,X290 3) Standard:GB/T 3091-2001, BS1387-1985, ASTM A53 ... Frequency Induction weld pipe EFW:Electric Fusion Welded Pipe Standard:API 5L, API 5CT, ASTM 53, EN10217, ... Blow Test, Impact Test), Exterior Size Inspection, Hydrostatic Test, X-ray Test. Mill Test Certificate:EN 10204/3.1B ...