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GB/T 45472-2025Prefabricated insulation pipes for overhead and utility tunnel (English PDF)

架空和综合管廊用预制保温管道

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

March 28, 2025

Implementation date

October 1, 2025

Scope

GB/T 45472-2025 is the English-translated version of 架空和综合管廊用预制保温管道.

GB/T 45472-2025 is the Chinese national standard covering the pre-insulated pipe run above ground or through a utility tunnel rather than buried — the product structure of service pipe, insulating layer and outer jacket, the insulation of calcium silicate, mineral wool or aerogel, the jacket that has to keep rain and tunnel damp out of insulation that loses its value once wet, the requirements up to 2.5 MPa and 350 degrees Celsius steam, and the inspection rules. First edition, under the Ministry of Housing and Urban-Rural Development. In force from 1 October 2025. Issued on 28 March 2025, it has been in force since 1 October 2025.

Document preview — GB/T 45472-2025

National Standard of the People's Republic of China

ICS: 91.140.10
Classification: P 46

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

PrefaceIII
1 Scope1
2 Normative references1
3 Terms and Definitions2
4 Product Structure2
5 General2
6 Requirements4
7 Test methods7
8 Inspection Rules9
9 Marking, transportation and storage11
Appendix A (Normative) Product Structure12

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 was proposed by the Ministry of Housing and Urban-Rural Development of the People's Republic of China.

This document is under the jurisdiction of the National Technical Committee for Urban Heating Standardization (SAC/TC455).

This document was drafted by: Shanghai Kehua Thermal Pipeline Co., Ltd., Tangshan Xingbang Pipeline Engineering Equipment Co., Ltd., China Urban Construction Research Institute Institute Co., Ltd., China Municipal Engineering North China Design and Research Institute Co., Ltd., Beijing Construction Engineering Quality Fourth Testing Institute Co., Ltd., Taiyuan Thermal Power Group Co., Ltd., Tianjin Tiandilong Pipe Industry Co., Ltd., Dalian Yiduo Pipeline Co., Ltd., Hebei Junye Technology Co., Ltd., Tianjin Yugang Insulation Building Materials Co., Ltd., Zhejiang Aske Building Materials Technology Co., Ltd., Wanhua Chemical (Ningbo) Wei Polyurethane Co., Ltd., Haotian Energy Saving Equipment Co., Ltd., Deshida (Tianjin) Pipeline Equipment Co., Ltd., Shanghai Energy Construction Engineering Design Research Co., Ltd., Tongxiang Taiaisi Environmental Protection Energy Co., Ltd., Zhejiang Yangu Technology Co., Ltd., Ningbo Wanli Pipeline Co., Ltd., Tianjin Taihe Energy Saving Technology Co., Ltd. and Harbin Dongguang Thermal Pipeline Manufacturing Co., Ltd.

The main drafters of this document are: Liu Lingcheng, Chen Lei, Qiu Huawei, Wang Huai, Hu Chunfeng, Bai Dongjun, Shan Haifeng, Liang Li, Ding Yu, Sun Yonglin, Li Deheng, Yan Bixing, Qiu Yiqi, Chen Jing, Zheng Zhongsheng, Li Guangyuan, Pan Zegang, Feng Hong, Zhao Keren, He Qilin, Li Zhi, and Wei Dongli.

Prefabricated insulated pipes for overhead and integrated pipe galleries

1 Scope

This document specifies the product structure, general rules, requirements, test methods and specifications of prefabricated insulated pipes for overhead and integrated pipe corridors (hereinafter referred to as "insulated pipes").

Inspection methods, inspection rules and marking, transportation and storage.

This document is applicable to the design pressure less than or equal to 2.5MPa, the steam temperature of the conveying medium less than or equal to 350°C, and the water temperature of 5°C~ Manufacturing and inspection of prefabricated insulated pipes for overhead and integrated pipeline galleries at 150°C.

2 Normative references

GB/T 2518

GB/T 3087

GB/T 3091

GB/T 3280

GB/T 3880.2

GB/T 3880.3

GB/T 8163

GB 8624

GB/T 8923.1-2011

GB/T 9711

GB/T 10699

GB/T 12459

GB/T 12754

GB/T 13350

GB/T 13401

GB/T 16400

GB/T 17116.1

GB/T 17116.2

GB/T 29046

GB/T 29047

GB/T 34336

GB 50236

GB 50683-2011

GB 50764

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 20 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 8923.1-2011 · GB/T 9711 · GB/T 10699 · GB 50236 · GB 50683-2011

Editions of GB/T 45472

Edition	Title	Revision	Status
GB/T 45472-2025	Prefabricated insulation pipes for overhead and utility tunnel	current edition	Current

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