GB 38300-2025 Protective clothing—Ensembles and garments for protection against cold English, Anglais, Englisch, Inglés, えいご
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ICS 13.340.10
CCS C 73
People's Republic of China National Standard
GB 38300-2025
Replaces GB/T 38300-2019
Protective Clothing — Ensembles and Garments for Protection Against Cold
Issued: 2025-08-29
Implemented: 2026-09-01
Issuing Authority: State Administration for Market Regulation
Standardization Administration of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Technical Requirements
5 Test Methods
6 Marking
7 Manufacturer's Information
Appendix A (Informative) Thermal Resistance Values of Standard Test Garments 8
References
1 Scope
This document specifies technical requirements, labeling, and manufacturer's information for cold-protective clothing, along with corresponding test methods.
Applicable to protective garments used by workers in cold environments to prevent frostbite and other hazards.
Not applicable to non-occupational protective clothing.
2 Normative References
The following referenced documents are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies:
GB/T 3917.3-2025 Textiles - Tear properties of fabrics - Part 3: Determination of tear force of trapezoidal-shaped test specimens
GB/T 3921-2008 Textiles - Tests for color fastness - Color fastness to washing with soap or soap and soda
GB/T 3923.1-2013 Textiles - Tensile properties of fabrics - Part 1: Determination of breaking force and elongation (Strip method)
GB/T 4744-2013 Textiles - Determination of water resistance - Hydrostatic pressure method
GB/T 5453-2025 Textiles - Determination of fabric permeability
GB/T 7742.1-2005 Textiles - Bursting properties of fabrics - Part 1: Hydraulic method for determination of bursting strength and bursting distension
GB/T 8427-2019 Textiles - Tests for color fastness - Color fastness to artificial light: Xenon arc fading lamp test
GB/T 8628-2013 Textiles - Preparation, marking and measuring of fabric specimens and garments in tests for determination of dimensional change
GB/T 8629-2017 Textiles - Domestic washing and drying procedures for textile testing
GB/T 8630-2013 Textiles - Determination of dimensional change after washing and drying
GB/T 11048-2018 Textiles - Physiological effects - Measurement of thermal and water-vapour resistance under steady-state conditions (Sweating guarded-hotplate test)
GB/T 12903-2008 Terminology for personal protective equipment
GB/T 14272-2021 Down garments
GB/T 18398-2001 Testing method for thermal resistance of clothing - Thermal manikin method
GB 18401-2010 National general safety technical code for textile products
GB/T 19981.2-2014 Textiles - Professional care, drycleaning and wetcleaning of fabrics and garments - Part 2: Procedure for testing performance when cleaning and finishing using tetrachloroethylene
GB 20097-2025 Protective clothing - General specifications
FZ/T 01143-2018 Coated fabrics - Test method for low-temperature flex resistance
HG/T 2581.1-2022 Rubber or plastics coated fabrics - Determination of tear resistance - Part 1: Constant rate of tear method
IDFB Part 15: Composition of Blended Filling Materials (International Down and Feather Bureau Testing Regulations)
3 Terms and Definitions
The terms defined in GB/T 12903-2008 and the following apply to this document.
3.1 Synthetic Temperature
An integrated representation combining ambient temperature and wind chill effect.
Note: Measured in degrees Celsius (°C).
3.2 Cold Environment
Environment with synthetic temperature below -5°C.
3.3 Ensemble
A combination of two pieces, one-piece (coverall), or multiple garments.
3.4 Effective Thermal Insulation (Icle)
Thermal resistance from skin to the outer surface of a single garment or ensemble under static conditions.
Note: Expressed in clo units (1 clo = 0.155 m²·K/W).
3.5 Total Thermal Insulation (It)
Thermal resistance from skin surface to the environment, including garment insulation and air layer insulation.
3.6 Thermal Insulation of Air Layer (Ia)
Thermal resistance of the air layer surrounding the ensemble surface under specified manikin test conditions.
3.7 Outer Shell Material
The outermost layer material of protective clothing.
3.8 Water-Vapour Resistance (Ret)
Ratio of water vapor pressure difference between two surfaces to the heat flux per unit area through the specimen.
Note: Heat flux may involve diffusion, convection, or both.
4 Technical Requirements
4.1 Design and Comfort
Structural design and comfort shall comply with GB 20097-2025.
4.2 Size Specifications
Garment sizing shall conform to GB 20097-2025.
4.3 Effective Thermal Insulation
Four grades specified in Table 1. Minimum requirement: Grade 1.
4.4 Air Permeability
Three grades specified in Table 2.
4.5 Hydrostatic Pressure Resistance
Two grades specified in Table 3. Waterproof garments shall meet at least Grade 1.
4.6 Material Performance
4.6.1 Basic Safety
Requirements listed in Table 4.
4.6.2 Tear Strength
Outer shell: ≥30 N (warp/weft).
4.6.3 Breaking Strength
Outer shell: ≥450 N (warp/weft).
4.6.4 Bursting Strength (Knits Only)
≥200 kPa.
4.6.5 Low-Temperature Flex Resistance
Required for coatings used below -50°C; no cracks after folding.
4.6.6 Dimensional Stability
Woven fabrics: ≤±3% after washing
Knits/Nonwovens: ≤±5%
4.6.7 Moisture Management
Waterproof garments:
Total water vapor resistance <55 m²·Pa/W, OR
If ≥55 m²·Pa/W, moisture permeability index ≥0.15
4.7 Color Fastness
Minimum requirements in Table 5.
4.8 Fill Materials
For down-filled garments:
Down content tolerance: ≥-5.0% of labeled value
Quality per GB/T 14272-2021
