发明名称 |
HEAT EXCHANGER TUBE REPAIR |
摘要 |
Prior to effecting a repair of a leaking heat exchanger tube by an internal repair tube brazed to the leaking tube, strain in the leaking tube is measured whilst heating it to brazing temperature. A braze is only effected if the strain is below a predetermined level. Apparatus for carrying out the strain measurement typically of probe form having a strain gauge head (21) at the nose of the probe and a heater element (23). Preferably, the length of the probe is such that the head (21) reaches to just above a grid support plate (12). Where strain is found to be above said predetermined level and the leaking tube is of U-shape the strain may be relieved by heating both legs of the tube. Alternatively, strain may be relieved by thinning and bulging the leaking tube (Figs 5A-C) at a region close enough to the braze for the thinned zone to experience heat from the braze to allow it to yield under the strain. |
申请公布号 |
DE3466279(D1) |
申请公布日期 |
1987.10.22 |
申请号 |
DE19843466279 |
申请日期 |
1984.04.11 |
申请人 |
UNITED KINGDOM ATOMIC ENERGY AUTHORITY |
发明人 |
ROACH, PETER FRANCIS;DUNCOMBE, EDWARD;HULSE, IAN;STACEY, JOHN |
分类号 |
F28F11/02;(IPC1-7):F28F11/02;F16L55/16 |
主分类号 |
F28F11/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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