MIL-HDBK-1005/7A
(3) Shutoff valves should be installed at
reasonable locations to allow isolation of any particular
section during repair and testing. The spacing should not
exceed 5,000 ft on long lines and 1,500 ft on loops.
(4) Check any danger of water hammer on long
lines, and provide special valving to reduce it. Refer to par.
5.4.8 for further information regarding surge prevention.
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