This document specifies the measurement performance, flow meter body, installation and maintenance, field verification test requirements, as well as flow calculation method and measurement uncertainty estimation of insertion-type gas ultrasonic flow meters using transit-time difference method (hereinafter referred to as “flow meters”). This document applies to measurement of natural gas flow in gathering and transmission equipment, gas transmission pipelines, storage facilities, gas distribution systems, user metering systems, measuring standard devices and other application places.
Basic Data
Standard ID
GB/T 18604-2023 (GB/T18604-2023)
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
46,414
Date of Issue
2023-05-23
Date of Implementation
2023-12-01
Older Standard (superseded by this standard)
GB/T 18604-2014
Issuing agency(ies)
State Administration for Market Regulation, China National Standardization Administration
