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 is an upcoming mandatory Chinese national standard for Eye and face protection—Welding protection—Part 2：Automatic welding filter. It appears in the Medical compliance cluster with a product safety focus and has an implementation date of Sep 1, 2026.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
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.
Technical requirements
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.
Testing methods
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.
FAQs
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.
Applicability hints
- Type
- Product
- CCS
- C73
- ICS
- 13.340.99
- Competent department
- Ministry of Emergency Management
- Technical committee
- National Technical Committee on Personal Protective Equipment of Standardization Administration of China
Relationships
Replaces:GB/T 3609.2-2009