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API 570 Appendix C - Repairs
- Thread starter WelshBoy
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Note states.....
--Size of the patch should not exceed 1/2 the pipe diameter. A full encirclement sleeve should be used if the corroded area exceeds 1/2 the diameter.--
My guess would be for structural support. The fact, that it jumps from a patch that's 1/2 the diameter all the way to a full sleeve, leads me to believe that the structural integrity needs to be accounted for.
--Size of the patch should not exceed 1/2 the pipe diameter. A full encirclement sleeve should be used if the corroded area exceeds 1/2 the diameter.--
My guess would be for structural support. The fact, that it jumps from a patch that's 1/2 the diameter all the way to a full sleeve, leads me to believe that the structural integrity needs to be accounted for.
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