TM 5-4220-226-14&P6-5. Umbilical Maintenance-continued.(g) Lay specimen out straight on a flat surface.(h) Observe pressure gage; increase hydrostatic pressure SLOWLY until specimen bursts; securehydrostatic pressure.NOTEMinimum acceptable burst pressure is 2400 psi.If specimen fails burst test, each hose bearing the samedate is to be removed from diving service.If specimen passes burst test, each hose from the same lotand the unburst tested section of specimen hose may becontinued in service until the next annual testing period.(i) Remove specimen from hydrostatic pressure source.(j) Remove pressure gage.(k) Reinstall coupling and new clamps on unburst tested specimen hose if specimen passes burst test.1Roughen cut end of hose with sandpaper.2Coat roughened end surfaces with rubber cement.3Seal end surfaces with Neoprene or polymarized rubber washer (1-inch OD x 1/2-inch ID x1/16-inch thick or 3/4-inch OD x 3/8-inch ID x 1/16-inch thick) as required.4Install coupling. If lubrication is required use water only.5Install three clamps on MIL-W-2845 hose, three clamps on 3/8-inch hose equally spaced alongshank. Clamps shall be tightened until the clamp depressses the hose so that daylightappears when a straight edge is held along the outside surface of the hose.6Perform coupling pull-out test.(3) Coupling Pull-out Test.WARNINGHydrostatic testing is potentially dangerous due to the highpressures involved and unpredictable results.Clear area before conducting test to avoid injury topersonnel.Ensure all air has been removed from hose beforeconducting test.6-4
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