GB/T 46341-2025 Active

This document specifies the main technical parameters and performance requirements, structural design, scope of supply and interfaces, spare parts, factory inspection and test items of the technical documents for flexible operation of ultra-wide-load hydraulic turbines, and proposes the regulations that its nameplate, packaging, transportation, storage and installation, operation, maintenance and acceptance tests should comply with.
This document is applicable to vertical-axis mixed-flow hydraulic turbines capable of long-term continuous safe and stable operation under ultra-wide-load conditions to meet the regulation needs of the new power system. It is suitable for new-built power stations and for the renovation and modification of existing power stations, including the renovation of only the turbine runner or the renovation of both the turbine runner and other components.
This document is used as a guide and reference for the preparation of bidding documents, design, manufacturing, installation, commissioning, and operation of flexible ultra-wide-load hydraulic turbines.
This document is applicable to flexible ultra-wide-load hydraulic turbine products that meet one of the following conditions. Other types of hydraulic turbines (including those for renovated units) may refer to this document for implementation.
a) Vertical-axis mixed-flow hydraulic turbines with a rated power of ≥50 MW.
b) Based on the characteristics of the hydraulic head section and the operating requirements of the unit, the limits for the nominal diameter of the turbine runner are specified as follows: — For vertical-axis mixed-flow hydraulic turbines with a rated head ≤50 m, the nominal diameter of the turbine runner D1≥4.0 m; — For vertical-axis mixed-flow hydraulic turbines with a rated head 50 m<≤100 m, the nominal diameter of the turbine runner D1≥3.5 m; — For vertical-axis mixed-flow hydraulic turbines with a rated head 100 m<≤150 m, the