ASME PTC 18
|Publication Date:||1 January 1992|
OBJECT AND SCOPE
This Code defines procedures for the field performance testing of hydraulic turbines and of pump/turbines operating in the turbine mode, both referred to herein as turbines. It defines methods for ascertaining turbine performance by measuring flow rate (discharge), head and power output to calculate turbine power output, and efficiency. Requirements are included for pretest arrangements, types of instruments, methods of measurement, testing procedures, methods of calculation, and contents of test reports. The specified test procedures are capable of providing a total uncertainty, calculated in accordance with the procedures of PTC 19.1 and those contained in this Code, of not more than ±1.2% of the calculated turbine power output, and ±2% of the calculated efficiency value. Any test with uncertainties greater than the above shall not qualify as ASME code test. Where good measurement conditions exist and best methodology can be used, smaller uncertainties should result.
This Code contains mandatory test requirements and alternative methods of measurement. The proper parts of the Code shall be applied to each test. This Code also contains the requirements for index testing.
This Code is recommended for use in conducting acceptance tests. Selection of alternative methods and procedures shall be agreed upon in writing prior to the test.
The Code on General Instructions (ASME PTC 1) governs the philosophy and general approach of performance test codes.
This Code applies to any size or type of water powered hydraulic turbine. It is particularly applicable to hydraulic turbines coupled to electric generators.
All codes or standards referenced herein shall be the issue or revision in effect on the date agreed to by the parties to the test.