发明名称 |
Method and apparatus for joining in-situ cement-mortar lined pipelines |
摘要 |
This invention is a method for joining sections of in-situ cement-mortar lined pipes adapted for high pressure water injection service. The method utilizes a backing ring with one beveled end inserted into a beveled end of the first pipe section and the other beveled end of the backing ring projecting from the first section and adapted to mate with a beveled end of the second pipe section. The pipe sections are then cement-mortar lined. The ends of the linings are then cut back and beveled to facilitate alignment and fit-up, and to provide a cavity and anchor for the retention of a heat expanding grout that is applied to both ends of the lined mating pipe sections to seal the joint. A root opening is left between the mated ends to permit weld penetration and fusion of the butted ends of the steel pipe and a space for the excess and expanding grout to protrude internally. The finished joint is strengthened by the backing ring which also facilitates the formation of a uniform butt weld and a cement lining that is free of voids or channels where the linings are joined.
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申请公布号 |
US5388863(A) |
申请公布日期 |
1995.02.14 |
申请号 |
US19930095098 |
申请日期 |
1993.07.20 |
申请人 |
SAUDI ARABIAN OIL COMPANY |
发明人 |
OMAR, AHMED A. |
分类号 |
F16L13/02;(IPC1-7):F16L58/06 |
主分类号 |
F16L13/02 |
代理机构 |
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主权项 |
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地址 |
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