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China Petrochemical News Network reported on October 11 that the 8825 nickel-based alloy high-pressure pipeline of the wax oil hydrogenation branch of the tenth building of Jiangsu Shenghong Refining and Chemical Corporation used phased array ultrasonic to test the weld quality, verifying that the automatic welding process was qualified, marking the 8825 nickel-based alloy.
The nickel-based alloy pipeline of the project has a diameter of more than 30,000 inches, and the prefabrication of high-pressure pipeline welding of its material has always been the focus of the project department
Faced with the problems of high efficiency and large heat output of traditional submerged arc welding methods, which are contrary to the small heat output requirements of nickel-based alloy welding process, the project department fully analyzed the welding characteristics and process requirements of nickel-based alloy and submerged arc welding, and formulated tests Method, try different conditions and parameters to ensure that there will be no interlayer unfusion and welding hot cracks
Phased array inspection can deeply detect small cracks.
The successful research and development of nickel-based alloy automatic welding technology promoted pipeline prefabrication, solved the problems of heavy tasks and short construction period, achieved cost reduction and efficiency increase, and realized high-quality construction
(Wang Yanhua)
