API 5L X80 Welded steel Pipe used in this program was 406mm diameter,8.8mm thick seam welded using the electrical resistance welding(ERW) process, the chemical composition of API 5L X80 Welded steel Pipe is characterized by a low carbon content and controlled additions of microalloys required for advanced thermomechanical rolling to optimize the level of strength and toughness as well as control of weldability.
Through thickness hardness profiles were conducted on all weld deposits, as expected the higher strength GMA weld, G1, recorded the highest hardness with values in the root pass up to 50 points higher than the pipe. both welds C1and G2 recorded hardness values which were below that of the pipe which supports the cross weld tensile tests discussed previously.
API 5L X80 Welded steel Pipe Specifications or Size:Out Diameter 300mm—2500mm ；Wall Thickness : 2mm—55mm；Length: Random length, Fixed Length, SRL, DRL.
Heat treatment:Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting.
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