GB24539-2021

Protective clothing—Chemical protective clothing

防护服装化学防护服

GB 24539-2021 es una norma nacional china obligatoria vigente: Protective clothing—Chemical protective clothing. Sector: Química. Enfoque: Seguridad de productos. Entrada en vigor: 1 sept 2022.

La aplicabilidad depende del alcance del producto, la vía de certificación, los avisos de la autoridad competente y las reglas de transición. Solicite una traducción o verifique la fuente antes de usar esta ficha en una decisión de cumplimiento.

Resumen de cumplimiento

Este resumen está disponible por ahora solo en inglés.

Alcance y aplicabilidad

This standard applies to chemical protective clothing used by personnel in workplaces and emergency response operations. It covers protection against gaseous, liquid, and solid chemical substances. It is not applicable to chemical protective clothing used in firefighting scenarios. The standard categorizes protective suits into several types, including gas-tight (Type 1), liquid-tight (Type 3 and 4), solid particulate (Type 5), limited spray (Type 6), and woven acid/alkali (Type 7) chemical protective clothing.

Requisitos técnicos

GB 24539-2021 specifies comprehensive technical requirements for the design, materials, and performance of chemical protective clothing. General requirements mandate that materials must not cause skin irritation or release harmful substances affecting the respiratory system, while balancing protection with wearer comfort and compatibility with other PPE. The standard outlines specific design requirements for each type of suit. For instance, gas-tight suits (Type 1) must be fully encapsulating and equipped with appropriate exhaust valves and visors, while liquid-tight suits must provide adequate protection against jets or sprays. Each product type must pass corresponding overall performance tests, such as gas-tightness or liquid penetration resistance. Regarding material performance, the standard sets limits for chemical resistance (permeation and penetration), physical durability (abrasion, flexing, puncture, tear, and tensile strength), and resistance to extreme temperatures. For example, gas-tight suits require high-level chemical permeation resistance against a specified list of chemicals, and fabric strength must not degrade significantly after high or low-temperature pre-treatment. Additional requirements for woven acid/alkali suits (Type 7) include specific limits on formaldehyde content, pH value, and colorfastness.

Métodos de ensayo

The standard details rigorous testing methodologies to verify compliance. Key tests include overall gas-tightness testing (Annex A) using inflation and pressure decay measurement, and inward leakage rate testing (Annex B) using a test chamber with NaCl or SF6 tracers. Liquid penetration resistance is evaluated through jet, spray, and limited spray tests (Annex C) using a dyed test solution and absorbent indicator garment. Material-level tests include liquid penetration resistance under pressure (Annex F), repellency (Annex I), abrasion resistance (Annex J), and flexing resistance (Annex K), with end-point determination often utilizing pressure vessel or hydrostatic head methods.

Preguntas frecuentes

What products are regulated under GB 24539-2021?

GB 24539-2021 regulates chemical protective clothing designed to protect workers from gaseous, liquid, and solid chemical hazards in industrial and emergency response settings. It covers various suit types, including gas-tight, liquid-tight, particulate, and limited spray protective clothing.

Are there any updates from the previous version of GB 24539?

Yes, GB 24539-2021 replaces GB 24539-2009, GB 24540-2009, and GB/T 29511-2013. Key updates include revised product classifications (adding gas-tight, limited spray, and woven acid/alkali types), new requirements for inward leakage rates, updated testing methods for overall performance, and new practical performance evaluation protocols.

Does GB 24539-2021 apply to firefighting chemical protective clothing?

No, this standard explicitly excludes chemical protective clothing used in firefighting scenarios. It is intended for industrial workplaces and general emergency response teams, not specialized firefighting operations.

The summary above provides a high-level overview of GB 24539-2021. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 24539-2021 today to access all detailed parameters, tables, and testing procedures.

Indicaciones de aplicabilidad

Tipo: Producto
CCS: C73
ICS: 13.340.10
Organismo competente: Ministry of Emergency Management
Comité técnico: Ministry of Emergency Management

Relaciones

Sustituye a:GB 24539-2009, GB 24540-2009, GB/T 29511-2013

Sustituida por:GB 24539-2025 (Próxima)