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GB/T 30500-2014Ultrasonic gas flow meter performance online audit - Method using speed of sound checking (English PDF)

气体超声流量计使用中检验声速检验法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

December 13, 2013

Implementation date

June 1, 2014

Scope

GB/T 30500-2014 is the English-translated version of 气体超声流量计使用中检验声速检验法.

GB/T 30500-2014 is the Chinese standard "Ultrasonic gas flow meter performance online audit - Method using speed of sound checking". Its scope clause reads: This standard specifies the test method for sound velocity of ultrasonic gas flowmeter in-service inspection methods.

This standard applies to the propagation time difference method for the principle, with self-diagnostic function plug-in gas ultrasonic flowmeter. Table 1 sets out the scope of the standard gas properties available.

Table 1 Characteristics of the scope of compliance with this standard gas mixture Project Scope Mole fraction /% Methane 45.0 to 100.0 Nitrogen 0 to 50.0 Carbon dioxide 0 to 10.0 Ethane 0 to 10.0 Propane 0 to 4.0 Total butane 0-1.0 Total pentane 0-0.3 Six plus carbon 0-0.2 Helium 0-0.2 Hydrogen 0 to 10.0 Carbon monoxide 0-3.0 Water 0-0.05 Hydrogen sulfide from 0 to 0.02 Temperature/°C -8 ~ 62 Pressure (absolute pressure)/MPa 0.2 ~ 12.

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Document preview — GB/T 30500-2014

National Standard of the People's Republic of China

ICS: 75.180.30
Classification: E 98

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1 Scope
2 Normative references
3 Terms, definitions and symbols
3.1 Terms and definitions
3.2 Symbols
4.1 theoretical speed of sound
4.2 4 measuring the speed of sound
5 Technical requirements
5.1 Gas Condition
5.2 gas composition measurements
5.3 pressure measurement
5.4 Temperature Measurement
5.5 Installation conditions
5.6 Technical requirements
6 Test the speed of sound
6.1 Measurement Condition
6.2 measuring device
6.4 Measurement procedures
7 measurement results processing
7.1 Sound Velocity deviation calculation
7.2 The maximum sound velocity difference calculation
7.3 Repeatability calculation
8 test results
9 test interval
Appendix A (informative) of natural gas and other hydrocarbon gases to calculate the speed of sound

1 Scope

This standard specifies the test method for sound velocity of ultrasonic gas flowmeter in-service inspection methods.

This standard applies to the propagation time difference method for the principle, with self-diagnostic function plug-in gas ultrasonic flowmeter.

Table 1 sets out the scope of the standard gas properties available.

Table 1 Characteristics of the scope of compliance with this standard gas mixture

Project Scope

Mole fraction /%

Methane 45.0 to 100.0

Nitrogen 0 to 50.0

Carbon dioxide 0 to 10.0

Ethane 0 to 10.0

Propane 0 to 4.0

Total butane 0-1.0

Total pentane 0-0.3

Six plus carbon 0-0.2

Helium 0-0.2

Hydrogen 0 to 10.0

Carbon monoxide 0-3.0

Water 0-0.05

Hydrogen sulfide from 0 to 0.02

Temperature/°C -8 ~ 62

Pressure (absolute pressure)/MPa 0.2 ~ 12

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein

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

GB 3836.1 explosive atmospheres - Part 1. General requirements for equipment

GB 3836.2 explosive atmospheres - Part 2. the flameproof enclosure "d" protection equipment

GB 3836.4 explosive atmospheres - Part 4. the intrinsically safe "i" protection equipment

GB/T 13609 Gas sampling guidelines

GB/T 13610 natural gas composition analysis by gas chromatography

GB/T 18603 natural gas measurement system technical requirements […]

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 18 pages — is available in the English PDF.

Referenced standards

Normative references

GB 3836.1 · GB 3836.2 · GB 3836.4

Cited by

GB/T 35186-2025Performance evaluation of measuring system for natural gas

Similar standards

GB/T 21446-2025|GB/T 35186-2025|GB/T 45373-2025|GB/T 9109.5-2025|GB/T 13894-2023|GB/T 18603-2023

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