GB/T 18604-2014: Measurement of natural gas flow by gas ultrasonic flow meters

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Scope

This Standard specifies measurement performance requirements of gas
ultrasonic flow meters, meter body requirements, installation and maintenance,
field verification test requirements, and flow calculation methods and
measurement uncertainty estimates.
This Standard is applicable to gas ultrasonic flow meters of plug-in transit-time
difference method (hereinafter referred to as the flow meter), which are
generally used for natural gas flow measurement in gathering devices, gas
pipelines, storage facilities, gas distribution systems and customer metering
systems. The use of external clamp-on gas ultrasonic flow meter can refer to
this Standard.

Basic Data

Standard ID	GB/T 18604-2014 (GB/T18604-2014)
Description (Translated English)	Measurement of natural gas flow by gas ultrasonic flow meters
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	E98
Classification of International Standard	75.180.30
Word Count Estimation	44,453
Date of Issue	2/19/2014
Date of Implementation	6/1/2014
Older Standard (superseded by this standard)	GB/T 18604-2001
Quoted Standard	GB 3836.1; GB 3836.2; GB 3836.4; GB/T 4208; GB/T 11062-1998; GB/T 13610; GB/T 17747.1; GB/T 17747.2; GB/T 17747.3; GB/T 21446-2008; SY/T 0599-2006; JJG 1030-2007; ISO 5167-1-2003; AGA REPORT NO.10
Regulation (derived from)	2014 National Standards Bulletin No. 2
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary	This Standard specifies performance requirements for measuring ultrasonic gas flowmeter, flowmeter body requirements, installation, and maintenance, on-site verification testing requirements, as well as the flow calculation method and the measurement unce