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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 standard "Prefabricated insulation pipes for overhead and utility tunnel".

Its scope clause reads: 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.

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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

Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 Product Structure
5 General
6 Requirements
7 Test methods
8 Inspection Rules
9 Marking, transportation and storage
Appendix A (Normative) Product Structure

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

The contents of the following documents constitute essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to

This document.

GB/T 2518 Continuously hot-dip galvanized and zinc alloy coated steel sheets and strips

GB/T 3087 Seamless steel tubes for low and medium pressure boilers

GB/T 3091 Welded steel pipe for low pressure fluid transportation

GB/T 3280 Stainless steel cold-rolled steel sheets and strips

GB/T 3880.2 Aluminium and aluminium alloy plates and strips for general industrial use Part 2.Mechanical properties

GB/T 3880.3 Aluminium and aluminium alloy plates and strips for general industrial use Part 3.Dimensional deviations

GB/T 8163 Seamless steel pipe for conveying fluids

GB 8624 Classification of combustion performance of building materials and products

GB/T 8923.1-2011 Surface preparation of steel materials before coating - Visual assessment of surface cleanliness - Part 1.Uncoated

The rust level and treatment level of the steel surface after the original coating is completely removed

GB/T 9711 Steel pipes for pipeline transportation systems in the petroleum and natural gas industries

GB/T 10699 Calcium silicate insulation products

GB/T 12459 Types and parameters of steel butt-welding pipe fittings

GB/T 12754 Color coated steel sheets and strips

GB/T 13350 Glass wool and its products for thermal insulation

GB/T 13401 Technical specification for steel butt-welding pipe fittings

GB/T 16400 Aluminum silicate wool and its products for thermal insulation

GB/T 17116.1 Pipe supports and hangers Part 1.Technical specifications

GB/T 17116.2 Pipe supports and hangers Part 2.Pipe connection parts

GB/T 29046 Technical index test methods for prefabricated insulated pipes for urban heating

GB/T 29047 High-density polyethylene outer protective pipe rigid polyurethane foam plastic prefabricated direct buried insulation pipe and pipe fittings

GB/T 34336 Nanoporous aerogel composite insulation products

GB 50236 Construction specification for welding engineering of field equipment and industrial pipelines

GB 50683-2011 Code for acceptance of construction quality of on-site equipment and industrial pipeline welding projects

GB 50764 Design specification for power piping in power plants

NB/T 47013.2-2015 Nondestructive testing of pressure equipment Part 2.Radiographic testing

GB 44016 | GB/T 21087 | CJ/T 395 | GB/T 33833 | GB/T 45465.1 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

Editions of GB/T 45472

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

This page sells the current edition, GB/T 45472-2025. Earlier editions are listed for reference only.

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