GB/T 13007-2011 in English

《GB/T 13007-2011离心泵 效率》由TC211（全国泵标准化技术委员会）归口，主管部门为中国机械工业联合会。

Scope

This standard specifies the efficiency of single-stage centrifugal water pumps, multi-stage centrifugal water pumps, and petrochemical centrifugal pumps. This standard applies to: a) single-stage centrifugal water pump: flow rate Q≥5m³/h, specific speed n_s=20～300 (or type number K=0.103～1.55); b) multistage centrifugal water pump: flow rate Q≥5m³/h～3000m³/h, specific speed n_s=20～300 (or type number K=0.103～1.55); c) petrochemical centrifugal pump: flow rate Q≥5m³/h～3000m³/h , Specific speed n_s=20~300 (or type number K=0.103~1.55).