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GB/T 45666-2025Classification codes and cartographic symbols for land pipeline features (English PDF)

陆域管线要素分类代码与符号表达

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

May 30, 2025

Implementation date

September 1, 2025

Scope

GB/T 45666-2025 is the English-translated version of 陆域管线要素分类代码与符号表达.

GB/T 45666-2025 is the Chinese national standard covering a single code and symbol for every pipeline on a map — the four-level classification that splits long-distance lines from urban ones and then by medium, power and communication through oil, gas, water, drainage and heating to the utility tunnel, the six-digit code and the rule for extending it, the point, line and area symbols, and the colour values that let one city's pipeline drawing be read in another's system. The code table and the legends are themselves normative, not illustrations. First edition, with the underground space information system standard GB/T 45668-2025, under the Ministry of Natural Resources. In force from 1 September 2025. Issued on 30 May 2025, it has been in force since 1 September 2025.

Document preview — GB/T 45666-2025

National Standard of the People's Republic of China

ICS: 07.040
Classification: A 75

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

PrefaceIII
1 Scope1
2 Normative references1
3 Terms and Definitions1
4 Classification and coding1
4.1 Classification1
4.2 Code Structure1
4.3 Encoding method2
4.4 Extension Rule2
5 Symbols and expressions2
5.1 General Provisions2
5.2 Point feature symbols2
5.3 Linear feature expression3
5.4 Surface element expression3
5.5 Note3
5.6 Color value3
Appendix A (Normative) Pipeline element classification and code4
Appendix B (Normative) Pipeline Point Elements Legend18
B.1 Legend of point elements of long-distance pipelines18
B.2 Urban pipeline point element example19
Appendix C (Normative) Pipeline Linear Element Legend25
Appendix D (Informative) Examples of Pipeline Surface Elements26
Appendix E (Normative) Color Values of Pipeline Point, Line and Area Element Symbols28
References29

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 Geographic Information Standardization (SAC/TC230).

This document was drafted by: Surveying and Mapping Standardization Institute of the Ministry of Natural Resources, Interstellar Space (Tianjin) Technology Development Co., Ltd., Ministry of Natural Resources The Sixth Topographic Survey Team (Underground Pipeline Survey and Engineering Institute of the Ministry of Natural Resources), Xiamen Jingtu Information Technology Co., Ltd., Beijing Surveying and Mapping Design Research Institute, Guangzhou Urban Planning, Survey and Design Institute Co., Ltd., China Coal (Xi'an) Underground Space Technology Development Co., Ltd., Zhengyuan Geographic Information Group Co., Ltd., Wuhan Institute of Surveying and Mapping, Qingdao Institute of Surveying and Mapping, Chongqing Institute of Surveying and Mapping Science and Technology, Changzhou Institute of Surveying and Mapping Institute of Surveying, Mapping and Remote Sensing Technology, Ningbo Institute of Surveying, Mapping and Remote Sensing Technology, First Topographic Survey Team of the Ministry of Natural Resources, Shenzhen Municipal Design and Research Institute Co., Ltd., Sichuan Chuanjian Survey and Design Institute Co., Ltd., Guangdong Aike Environmental Technology Co., Ltd., Hefei Underground Pipeline Network Construction Management Office, Beijing Municipal Academy of Science and Technology, Shenzhen Dahua Surveying Technology Co., Ltd., Urban and Rural Research Institute (Guangzhou) Co., Ltd., Shanghai Geotechnical Engineering Testing Center Co., Ltd., HuaDa Tianyuan (Beijing) Technology Co., Ltd., and Kunming Institute of Surveying and Mapping.

The main drafters of this document are: Liu Xiaoqiang, Jiang Yifang, Wu Tong, Chen Yong, Qiao Zhiyong, Zhang Fenglu, Qiu Guangxin, Wang Xiaodong, Li Xuejun, Tan Renchun, Li Li, Yang Benting, Pan Boming, Li Zhigang, Fu Huanian, Li Xin, Zhang Yuandong, Chen Fabo, Deng Nan, Li Shechun, Xu Xingquan, Luo Yongzhong, Luo Yunfeng, Li Bin, Chen Min, Song Chao, Luo Shaohua, Liu Feng, Wenhua, Wu Wujiu, Hou Zhiqun, and He Jianglong.

Classification code and symbol expression of land pipeline elements

1 Scope

This document specifies the classification, coding and symbolic expression of land pipeline elements.

This document is applicable to the data collection, database construction, updating, sharing, exchange, information system construction and pipeline map production of long-distance and urban pipelines.

2 Normative references

This document has no normative references.

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 pipeline

Pipelines for transporting liquids, gases or powders, cables for transmitting electricity and information, as well as channels and corresponding ancillary facilities.

3.2 Pipeline section

A linear feature formed by the logical connection of two pipeline point features.

3.3 Pipe

Tubular equipment consisting of pipe sections, fittings and supports.

4 Classification and coding

4.1 Classification

4.1.1 Element types are divided into major categories, medium categories, minor categories and subcategories according to their subordinate relationships.

4.1.2 The major elements are divided into two categories, including. long-distance pipelines and urban pipelines.

4.1.3 Elements of the middle category Based on the major categories, long-distance pipelines are divided into five categories according to the transport medium, including. transmission lines, communication lines, oil pipelines, Pipelines, gas pipelines, water pipelines; urban pipelines are divided into 8 categories, including. power pipelines, communication pipelines, water pipelines, drainage pipelines, gas pipelines Pipelines, thermal pipelines, industrial pipelines, and integrated pipeline galleries.

4.1.4 The element subcategories and sub-categories are subdivided according to purpose and function based on the classification at the previous level.

4.1.5 The classification of elements shall be carried out in accordance with Appendix A.

4.2 Code Structure

The classification code adopts a 6-digit decimal code and is implemented according to Appendix A. The code structure is shown in Figure 1.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 31 pages — is available in the English PDF.

Referenced standards

Cited by

GB/T 45668-2025Technical requirements for underground space information system construction

Editions of GB/T 45666

Edition	Title	Revision	Status
GB/T 45666-2025	Classification codes and cartographic symbols for land pipeline features	current edition	Current

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