GB3609.2-2025

Eye and face protection—Welding protection—Part 2：Automatic welding filter

眼面部防护焊接防护第2部分：自动变光焊接滤光镜

GB 3609.2-2025 é uma norma nacional chinesa obrigatória que entrará em vigor: Eye and face protection—Welding protection—Part 2：Automatic welding filter. Setor: Médico. Foco: Segurança de produtos. Entrada em vigor: 1 de set. de 2026.

A aplicabilidade depende do escopo do produto, da via de certificação, dos avisos da autoridade competente e das regras de transição. Solicite uma tradução ou verifique a fonte antes de usar este registro em uma decisão de conformidade.

Visão geral de conformidade

Esta visão geral está disponível por enquanto apenas em inglês.

Escopo e aplicabilidade

This standard applies to automatic welding filters (AWF) designed to be installed on welding protective equipment. It covers products used in various welding applications to protect against optical radiation, sparks, and molten metal. It is mandatory for manufacturers producing welding helmets and face shields for the Chinese market. The standard specifically excludes fixed shade welding filters, which are covered in GB 3609.1.

Requisitos técnicos

The standard specifies comprehensive requirements for the materials, structure, and specifications of AWFs. It mandates that materials in contact with the skin must not cause allergies, and defines minimum dimensions for light-transmitting areas. Manufacturers must ensure smooth surfaces without burrs or sharp edges. Regarding optical performance, the standard sets strict limits on spherical power, astigmatic power, and prismatic power for both plano and corrective lenses. It also introduces requirements for light signal recognition, ensuring that welders can accurately identify red, yellow, green, and blue signals. A significant portion of the standard addresses transmittance and shade numbers. It defines limits for ultraviolet, visible light, infrared, and blue light transmittance across various temperatures (-5°C to 55°C). Products must maintain stable transmittance over time and demonstrate uniformity across the lens surface. The standard also specifies critical dynamic properties, including switching time and holding time. It outlines requirements for angle dependence, narrow-angle scattering, and specific performance criteria for auto-darkening and side-view AWFs.

Métodos de ensaio

The standard details rigorous testing procedures, including the use of spectrophotometry and wide-band methods for measuring visible light transmittance. It describes specialized tests for evaluating uniformity and angle dependence by varying the incidence and rotation angles. Furthermore, it outlines procedures for measuring switching time and holding time using simulated welding arc light sources under controlled temperature environments.

Perguntas frequentes

What products are regulated under GB 3609.2-2025?

It regulates automatic welding filters (AWF) intended for installation on welding protective gear, including both direct view and side view applications.

Are there any updates from the previous version of GB 3609.2?

Yes, compared to GB/T 3609.2-2009, this version adds requirements for light signal recognition, blue light transmittance, and holding time, while updating testing methods for transmittance and switching time. It has also transitioned from a recommended to a mandatory standard.

Does this standard apply to laser welding protection?

While this standard covers AWFs, for laser welding applications, the assembled protective equipment must also comply with GB 30863 for laser protection.

The summary above provides a high-level overview of GB 3609.2-2025. 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 3609.2-2025 today to access all detailed parameters, tables, and testing procedures.

Indicações de aplicabilidade

Tipo: Produto
CCS: C73
ICS: 13.340.99
Órgão competente: Ministry of Emergency Management
Comitê técnico: National Technical Committee on Personal Protective Equipment of Standardization Administration of China

Relações

Substitui:GB/T 3609.2-2009