Journal of Welding and Joining
- Volume 14 Issue 5
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- Pages.95-105
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- 1996
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- 2466-2232(pISSN)
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- 2466-2100(eISSN)
A Study on Temperature Profile and Residual Stress in Pipeline Repair Welding Using Sleeve
슬리브덮개를 이용한 배관 보수용접시 온도분포와 잔류응력에 관한 연구
Abstract
Korea Gas Corporation has operated high pressure gas transmission line of about 600 kilometers and, therefore, a series of repair welding processes are required in order to cope with external defects such as dent, gouge, cracking usually due to mechanical attacks. Most of gas pipelines repair processes are performed after completely venting remaining gas. However, in some case, though it is very unusual, repairs require without venting gas. For instance, this case is that damaged pipeline is remedied with split sleeve by welding. In this paper, in an effort to confirm a safe application of the split sleeve welding, residual stress, strain and temperature distributions are evaluated by computer simulation and experiments. The results obtained are as follows : 1) Computer modelling is supposed to be reasonable because microstructure changes due to welding is simulated coincidently as compare to that of real condition. 2) The maximal temperature on inside surface of pipeline is 50
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