GB/T 21446-2025 Active National standards

GB/T 21446-2025 Measurement of natural gas flow by means of standardized orifice meter

Publish Date: 2025-10-05 Implement Date: 2026-05-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 21446-2025

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Oil and gas gathering and transportation equipment

ICS Name: Volume equipment and volume measurement

Publish Date: 2025-10-05

Implement Date: 2026-05-01

Pages: 100 pages

Scope

This document specifies the technical requirements for the processing and installation of standard orifice plates, and provides methods for calculating the mass flow rate of natural gas, the volume flow rate and energy flow rate under standard reference conditions, as well as the evaluation of measurement uncertainty.
This document is applicable to single-phase natural gas, with pressure tapping methods such as flange pressure tapping and angle-joint pressure tapping. The orifice plate aperture diameter is equal to or greater than 12.5 mm, the measurement tube inner diameter is equal to or greater than 50 mm and equal to or less than 1,000 mm, the diameter ratio is equal to or greater than 0.1 and equal to or less than 0.75, and the Reynolds number of the pipeline is equal to or greater than 5,000.

Development Information

Word Count: 178 Thousand words Pages: 100 pages

Replace the following standards

GB/T 21446-2008 Measurement of natural gas flow by means of standard orifice meter

Referenced Standards

Related Standards

GB/T 13235.3-1995 Active

GB/T 13235.3-1995 Petroleum and liquid petroleum products—Volumetric calibration of vertical cylindrical metal tanks—Electro-optical distance-ranging internal method

Publish Date: 1995-12-21

GB/T 6968-1997 Replaced

GB/T 6968-1997 Diaphragm gas meters

Publish Date: 1997-07-29

GB/T 17286.1-1998 Replaced

GB/T 17286.1-1998 Liquid hydrocarbons—Dynamic measurement—Proving systems for volumetric meters—Part 1:General principles

Publish Date: 1998-04-02

GB/T 17286.2-1998 Replaced

GB/T 17286.2-1998 Liquid hydrocarbons—Dynamic measurement—Proving systems for volumetric meters—Part 2:Pipe provers

Publish Date: 1998-04-02

GB/T 17286.3-1998 Replaced

GB/T 17286.3-1998 Liquid hydrocarbons—Dynamic measurement—proving systems for volumetric meters—Part 3:Pulse interpolation techniques

Publish Date: 1998-04-02

GB/T 17287-1998 Active

GB/T 17287-1998 Liquid hydrocarbons—Dynamic measurement—Statistical control of volumetric metering systems

Publish Date: 1998-04-02