Indian Standard: DESIGN AND INSTALLATION OF FIXED ...
2018-11-14u2002·u2002The diameter of the suction pipe shall be such that the rate of flow of water through it does not exceed 90 m per minute when the pump is delivering at its rated discharge. If, however, the pump is situated below the level of water supply, the diameter of the suction pipe/header shall be based upon a rate of flow of 120 m per minute. 9.1.11
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