I.S. EN 60609-2:2000

FOREWORD
INTRODUCTION
1 General
    1.1 Scope and object
    1.2 Excluded topics
    1.3 Normative reference
2 Terms, symbols and definitions
    2.1 Units
    2.2 List of terms
    2.3 Location and type of damage to Pelton buckets
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
          3.3.1 Reference duration of operation
          3.3.2 Actual duration of operation
          3.3.3 Special conditions
4 Test procedure
    4.1 Cavitation pitting repair during the guarantee
          period
    4.2 Measurement and calculation of the amount of
          cavitation pitting
5 Computation of results
    5.1 Fulfilment of the guarantee
Annexes
A Examples of amounts of cavitation pittings
B Bibliography

Provides a basis for the measurement and evaluation of the amount of cavitation pitting on Pelton turbine runners of a given turbine, which is defined in the contract by power, specific hydraulic energy of machine (head), rotational speed, material, operation etc.