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GB/T 45622-2025Terminology of seawater desalination and multi-purpose utilization (English PDF)

海水淡化及综合利用术语

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

May 30, 2025

Implementation date

December 1, 2025

Scope

GB/T 45622-2025 is the English-translated version of 海水淡化及综合利用术语.

GB/T 45622-2025 is the Chinese national standard covering the vocabulary of the seawater industry in one place — the basic terms of raw seawater, brackish water and desalination, the distillation and the membrane processes and the ones that fit neither, seawater cooling with its corrosion, fouling and algae control and its cooling towers, seawater piped into buildings and what is done to it before and after, the extraction of potassium, bromine, magnesium, iodine, lithium and uranium, and an index. The scope names economic and trade work and the translation of technical literature alongside research and design. First edition, under the Ministry of Natural Resources. In force from 1 December 2025. Issued on 30 May 2025, it has been in force since 1 December 2025.

Document preview — GB/T 45622-2025

National Standard of the People's Republic of China

ICS: 07.060
Classification: A 45

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

PrefaceIII
1 Scope1
2 Normative references1
3 Basic terminology1
4 Seawater desalination technical terms2
4.1 General terms2
4.2 Technical terms for seawater desalination by distillation4
4.3 Terminology of membrane desalination technology7
4.4 Other seawater desalination technology terms10
5 Seawater Cooling Technical Terminology11
5.1 General terms11
5.2 Corrosion Control Technology Terminology13
5.3 Fouling Control Technology Terminology13
5.4 Terminology of algae control technology14
5.5 Technical terms for seawater cooling towers15
6 major technical terms for seawater in daily life17
6.1 General terms17
6.2 Terminology of pre-treatment technology for large domestic seawater18
6.3 Technical terms for post-treatment of seawater for domestic use18
7 Technical terms for extraction and utilization of seawater chemical resources20
7.1 Potassium extraction technical terms20
7.2 Technical terms for bromine extraction22
7.3 Magnesium extraction technical terms25
7.4 Iodine extraction technical terms26
7.5 Lithium extraction technical terms27
7.6 Uranium Extraction Technical Terminology27
References29
Index30

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document is proposed by the Ministry of Natural Resources of the People's Republic of China.

This document is under the jurisdiction of the National Technical Committee for Marine Standardization (SAC/TC283).

This document was drafted by: Tianjin Institute of Seawater Desalination and Comprehensive Utilization of the Ministry of Natural Resources and National Marine Standards and Metrology Center.

The main drafters of this document are: Ruan Guoling, Qi Chunhua, Jiu Lanying, Wu Haihong, Zhang Lianqiang, Kou Xiyuan, Wang Yuhong, Xu Chunhong, Wu Yunqi, Han Kexin, Yin Jianhua, Wu Yunfang, Wang Tao, Wang Liang, Zhang Yushan, Qiu Jinquan, Shi Yulian.

Terminology of seawater desalination and comprehensive utilization

1 Scope

This document defines the basic terms of seawater desalination and comprehensive utilization, seawater desalination technology, seawater cooling technology, and large-scale life seawater technology.

Common terms and definitions of seawater chemical resource extraction and utilization technologies.

This document is applicable to the scientific research, management, design, production application, economic and trade, technical document formulation, book and periodical editing in the field of seawater desalination and comprehensive utilization.

Writing and translation of literature.

2 Normative references

This document has no normative references.

3 Basic terminology

3.1 raw seawater rawseawater

Untreated seawater.

[Source. HY/T 203.1-2016, 2.1]

3.2 Brackish water

Water with a total salt content higher than 1000 mg/L and lower than the total salt content of original seawater.

Note. The total salt content is generally between 1000mg/L and 10000mg/L.

3.3 Desalination

The process of removing part or most of the salt from seawater or brackish water to obtain fresh water.

3.4 seawater multi-purpose utilization

Technologies and processes for effectively utilizing seawater as a resource in various ways.

Note. Comprehensive utilization of seawater mainly refers to seawater cooling, large-scale domestic use of seawater, extraction and utilization of seawater chemical resources, and other technologies and processes for utilizing seawater resources.

Processes, excluding seawater desalination, salt pan salt production and marine aquaculture.

3.5

Research and development, production and service activities for seawater desalination, seawater cooling, large-scale domestic seawater use, and seawater chemical resource utilization.

3.6 waterintake

The process of obtaining raw seawater or brackish water from the source.

3.7 Pretreatment

The process of removing particles of mud, sand, colloids, microorganisms and other substances from the original seawater (brackish water) before the desalination and deionization process.

Note. Pretreatment generally includes sterilization, coagulation, sedimentation, flotation, filtration and other processes.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 41 pages — is available in the English PDF.

Editions of GB/T 45622

Edition	Title	Revision	Status
GB/T 45622-2025	Terminology of seawater desalination and multi-purpose utilization	current edition	Current

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