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 TM 55-1905-223-SDC
The sheet metal in the body of the patch must be as heavy and strong as possible, but it should be capable of
being sprung or bent so the gap will go over the pipe to be repaired. A sheet of packing is first put over the
hole, extending well on either side of it. The jubilee clamp is then sprung open and clamped over the packing.
When the bolts are tightened, this patch will easily hold upward of one hundred pounds pressure.
Every damage control locker should contain several of these homemade patches in assorted sizes because
each patch fits only one size pipe.
c. Soft patches. Small holes or cracks in low-pressure (150 psi.) piping often can be repaired by what
are known as soft patches. Examples of the application of soft patches on a low-pressure pipe line are shown
in FIGURE 8-6.
8-13
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