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QB/T 4903-2025Disposable heating patch (bag) (English PDF)

热贴温度特性检测仪一次性发热贴（袋）

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Issued by

Ministry of Industry and Information Technology

Level / Type

National · Recommended

Issue date

April 10, 2025

Implementation date

November 1, 2025

Scope

QB/T 4903-2025 is the English-translated version of 热贴温度特性检测仪一次性发热贴（袋）.

QB/T 4903-2025 — This standard specifies the product classification, requirements, inspection rules, marking, packaging, transportation, storage, and instructions for use of disposable heating pads (bags).

It describes the corresponding test methods. This standard applies to the production and sale of disposable heating pads (bags) that use iron powder as the main raw material and continuously release heat through an oxidation reaction with air.

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Document preview — QB/T 4903-2025

National Standard of the People's Republic of China

ICS: 97.180
Classification: Y 89
Replacing: QB/T 4903-2016, QB/T 5283-2018

Issued by: Ministry of Industry and Information Technology

What this standard covers1
Document data2

What this standard covers

This standard specifies the product classification, requirements, inspection rules, marking, packaging, transportation, storage, and instructions for use of disposable heating pads (bags). It describes the corresponding test methods. This standard applies to the production and sale of disposable heating pads (bags) that use iron powder as the main raw material and continuously release heat through an oxidation reaction with air. This standard does not apply to heating pads (bags) used in conjunction with a casing.

Document data

International classification (ICS): 97.180.

Chinese classification (CCS): Y89.

Estimated length of the Chinese original: 15,112 words.

Supersedes the earlier edition QB/T 4903-2016, QB/T 5283-2018.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 10 pages — is available in the English PDF.

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