Safety factors must be considered for all types of pumps to prevent cavitation
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Regarding the safety margin for the effective net positive suction head NP SHa of pumps, which of the following statements is incorrect? (A) It should be at least 0.3 meters. (B) For ordinary centrifugal pumps, it should be between 0.6 and 1 meter. (C) For certain liquids that are prone to vaporization at equilibrium temperatures, it should be greater than 1.3 times SHr. (D) A safety margin must be considered for all types of pumps to prevent cavitation. Is B correct? Is there a source? Is D incorrect? How to explain it?
For imports of several hundred meters in length, there’s probably no need to consider a safety margin