回转动力泵.液压性能验收试验.等级1,2和3

[中文适用范围]： 本国际标准规定了客户验收转子动力泵（离心泵、混流泵和轴流泵，以下统称“泵”）的水力性能试验。本国际标准旨在用于在泵测试设施（例如制造商的泵测试设施或实验室）进行泵的验收试验。它适用于任何尺寸的泵和任何泵送液体，只要其性质类似于清洁冷水。本国际标准规定了三个验收等级： - 1B、1E 和 1U 级，公差更严格； - 2B 和 2U 级，公差更宽； - 3B 级，公差更宽。本国际标准既适用于不带任何配件的泵本身，也适用于泵与其全部或部分上游和/或下游配件的组合。 [外文原描述]： ISO 9906:2012 specifies hydraulic performance tests for customers' acceptance of rotodynamic pumps (centrifugal, mixed flow and axial pumps). It is intended to be used for pump acceptance testing at pump test facilities, such as manufacturers' pump test facilities or laboratories. ISO 9906:2012 can be applied to pumps of any size and to any pumped liquids which behave as clean, cold water. It specifies three levels of acceptance: grades 1B, 1E and 1U with tighter tolerance; grades 2B and 2U with broader tolerance; grade 3B with even broader tolerance. It applies either to a pump itself without any fittings or to a combination of a pump associated with all or part of its upstream and/or downstream fittings.