GB/T 24789-2022 (English Version)

Standard No.: GB/T 24789-2022
Language: Chinese, Available in English version
Release Date: 2022
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 24789-2022
Replace: GB 24789-2009

Scope: This document specifies the general rules for the allocation and management of water measuring instruments for water use units, the requirements for the scope of measurement and the allocation rate of measuring instruments, and the requirements for measurement management. This document is applicable to the allocation and management of water measuring instruments for agricultural, industrial and service water units.

Introduction

Technical points of standard revision

The technical update highlights of this version compared with GB24789-2009 are:

Added agricultural irrigation channel metering standards (main/branch/ditch need to be metered separately)
Clarified the sub-item metering requirements for multiple buildings in the service industry (including heating/swimming pool/artificial snowmaking system)
Upgraded intelligent requirements (emphasizing remote transmission and online calibration functions)

Comparison table of metering facilities for the three industries
Item	Industrial water use unit	Agricultural irrigation area	Service industry institution
Graded metering depth	Three-level configuration (unit→water-using equipment＞1m³/h)	Four-level division (headwork→branch→output port)	Three-zone control (unit→functional area→equipment)
Equipment rate requirements	Main system＜b＞≥85%	Trunk and branch channel nodes＜b＞≥90%	Functional area nodes＜b＞≥95%

Special instrument selection requirements

Electromagnetic flowmeter(JJG1033): Applicable to places where the water quality of the main pipeline in the factory is stable, and annual mandatory inspection is required
Ultrasonic water meter(JJG1030): Recommended for use when suspended solids exceed the standard in mining areas, monthly calibration is required

Intelligent management system solution

Remote meter reading module: RS-485/4G gateway integration
Data analysis platform: Water balance dynamic monitoring algorithm
Abnormal early warning mechanism (Pipeline leakage identification model)

Application case: Power plant renovation project

The boiler system with a construction area of 300,000 square meters is configured with an intelligent control type turbine flowmeter:

Parameters	Before renovation	After renovation
Metering rate deviation	7.2%	≤0.5%
Annual water-saving economic benefits	-	¥2.58 million

GB/T 24789-2022 Referenced Document

GB/T 21303 Specifications for water measurement of irrigation canal system
GB/T 21534 Water saving—Terminology
GB/T 778.1 Meters for cold potable water and hot water.Part 1: Metrological requirements and technical requirements
JJG 1030 Technical performance test specification for constant temperature bath
JJG 1033 Electromagnetic Flowmeters

GB/T 24789-2022 history

2022 GB/T 24789-2022 General rules for equipping and managing of the water measuring instrument in water-use organization
2009 GB 24789-2009 General provisions on equipping and managing of the measuring instrument of water in organization of water using

GB/T 24789-2022 General rules for equipping and managing of the water measuring instrument in water-use organization has been changed from GB 24789-2009 General provisions on equipping and managing of the measuring instrument of water in organization of water using.