Obsolete

GB/Z 35717-2017Discharge measurement for hydraulic turbines, storage pumps and pump-turbines -- Ultrasonic transit-time method (English PDF)

水轮机、蓄能泵和水泵水轮机流量的测量超声传播时间法

GB/Z 35717 | Evolution and historical versions

Std ID	Title	Status
GB/Z 35717-2017	Discharge measurement for hydraulic turbines, storage pumps and pump-turbines -- Ultrasonic transit-time method	Obsolete

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Issued by

General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China

Level / Type

National · Recommended

Issue date

December 29, 2017

Implementation date

July 1, 2018

Scope

GB/Z 35717-2017 is the English-translated version of 水轮机、蓄能泵和水泵水轮机流量的测量超声传播时间法.

GB/Z 35717-2017 is the Chinese standard "Discharge measurement for hydraulic turbines, storage pumps and pump-turbines -- Ultrasonic transit-time method".

Its scope clause reads: This guidance is given in the technical documents of turbines, storage pumps and pump turbines ultrasonic flow measurement time method, including measurement of the original Management, test methods and calibration, measurement uncertainty.

This guideline is applicable to the on-site flow measurement of water turbines, storage pumps and pump turbines. The runners are pressurized runners and the cross section is Circular or rectangular, diameter or equivalent diameter of not less than 0.8m; does not apply to turbine, energy storage pump and pump turbine model test flow measuring.

This guideline is applicable to the Ultrasonic Propagation Time Measurement Unit (hereinafter referred to as the "Flow Measurement Unit" Device) flow measurement, does not apply to the use of clamp-type ultrasonic flowmeter flow measurement. Its clauses include terms and definitions.

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Document preview — GB/Z 35717-2017

National Standard of the People's Republic of China

ICS: 27.140
Classification: K 55

Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 symbol
5 measurement principle
5.1 Fundamentals
5.2 Ultrasound propagation time measurement
5.3-channel axial velocity calculation
5.4 Traffic Calculation
6 test methods and calibration
6.1 Installation Location Requirements and Channel Configuration
6.2 transducer installation and geometric parameter measurement
6.3 host functional requirements and testing
6.4 Third Party Calibration and Period Verification
7 Measurement Uncertainty
Appendix A (Normative) Channel height and weight coefficient
Appendix B (Normative) Flow rate representative reference data
Appendix C (Normative) Geometric measurement of circular flow measurement device
Appendix D (Normative) Uncertainty assessment method
Appendix E (Informative) Sound velocity in pure water
References

1 Scope

This guidance is given in the technical documents of turbines, storage pumps and pump turbines ultrasonic flow measurement time method, including measurement of the original

Management, test methods and calibration, measurement uncertainty.

This guideline is applicable to the on-site flow measurement of water turbines, storage pumps and pump turbines. The runners are pressurized runners and the cross section is

Circular or rectangular, diameter or equivalent diameter of not less than 0.8m; does not apply to turbine, energy storage pump and pump turbine model test flow measuring.

This guideline is applicable to the Ultrasonic Propagation Time Measurement Unit (hereinafter referred to as the "Flow Measurement Unit"

Device) flow measurement, does not apply to the use of clamp-type ultrasonic flowmeter flow measurement.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article

Pieces. For undated references, the latest edition (including all amendments) applies to this document.

JZF1358-2012 non-real-current method calibration DN1000 ~ DN15000 liquid ultrasonic flowmeter calibration specification

IEC 60041-1991 Turbine, storage pump and pump turbine hydraulic field acceptance test (Fieldacceptanceteststo determinethehydraulicperformanceofhydraulicturbines, storagepumpsandpump-turbines)

ISO 12242.2012 Determination of fluid flow in closed conduits Liquid Ultrasonic Propagation Time Method (Measurement Measurement Fluid inclosedconduits-Ultrasonictransit-timemetersforliquid)

ASMEPTC18-2011 Hydraulic Turbines and Pump-Turbines Performance Test Specification

PerformanceTestCodes)

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 Ultrasonic transmission time method

Using the difference between ultrasonic propagation time in the fluid and the countercurrent propagation time, the flow velocity is obtained, which is obtained by multiplying the flow velocity by the area

Method of traffic.

3.2 Ultrasonic transducer

In the role of electrical signals can produce ultrasonic output, and ultrasonic signals can be converted into electrical signals of the device.

3.3 Internal Transducer

The use of welding, bolts and other ways fixed on the inner wall of the ultrasonic transducer transducer.

Note. The internal transducer is also referred to as an enclosed transducer.

GB/T 14478 | GB/T 15468 | GB/T 10969 | GB/T 28546 | GB/T 43683.3 | GB/T 35717 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 44 pages — is available in the English PDF.

Referenced standards

Normative references

IEC 60041-1991 · ISO 12242.2012

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