Development and application of automatic welding system for D1219 mm pipeline in mountain area
In view of the technical problems of automatic welding construction of long-distance pipeline in mountainous area,the mountain system welding construction equipment such as D1219 mm flexible internal welding machine,hot bent pipe bevel machine,pipe lifting machine and welding engineering truck were developed.At the same time,the lengthened hot bent pipe was successfully produced,which meets the requirements of automatic welding of the hot bent pipe and straight pipe and AUT detection.At horizontal 0°and tilted 30°,L555M,D1219 mm×18.4 mm straight pipe was assembled with D1219 mm×22 mm extended hot bent pipe and automatic welding process test was carried out using mountain flexible internal welding machine and double torch welding machine,and both the non-destructive testing and mechanical properties test results were qualified.The mountain flexible internal welding machine has been applied industrially in the second line of"Sichuan Gas Out of Sichuan"Project,realizing continuous automatic welding without break points from the bottom of the mountain to the top of the mountain through the extended hot bent pipe,and then from the top of the mountain to the bottom of the mountain.
long-distance pipelinemountain flexible internal welding machineextended type heat bent pipeautomatic weldingindustrial application
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