EN 60609-1:2005

FOREWORD
INTRODUCTION
1 Scope and object
  1.1 Excluded topics and limitations
  1.2 Considerations concerning chemical composition of
      water
  1.3 Considerations concerning water containing solids
  1.4 Normative references
2 Terms, definitions and symbols
  2.1 Units
  2.2 List of terms
3 Nature and extent of cavitation-pitting guarantees
  3.1 Period of guarantee
  3.2 Definition of the amount of cavitation pitting
  3.3 Operating ranges and duration of operation
4 Procedures
  4.1 Repair of cavitation pitting during the guarantee
      period
  4.2 Measurement and calculation of the amount of
      cavitation pitting
5 Computation of results and fulfilment of the guarantee
Annex A (normative) Examples of amounts of cavitation pitting
Annex ZA (normative) Normative references to international
                     publications with their corresponding
                     European publications
Bibliography
Figures

Provides a basis for the formulation of guarantees applied to cavitation pitting for reaction hydraulic turbines, storage pumps and pump-turbines. It addresses the measurement and evaluation of the amount of cavitation pitting on certain specified machine components for given conditions, which are defined in the contract by output, specific hydraulic energy (E), speed, material, operation, etc. The cavitation-pitting evaluation is based on the loss of material during a given time and under accurately defined operating conditions. All wetted surfaces are considered