GB6566-2010
Limits of radionuclides in building materials
建筑材料放射性核素限量
GB 6566-2010 is a current mandatory Chinese national standard for Limits of radionuclides in building materials. It appears in the Electronics compliance cluster with a product safety focus and has an implementation date of Jul 1, 2011.
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 inorganic non-metallic building materials where limits of radionuclides are required. It covers both main building materials and decorative materials. It does not apply to organic building products. *This standard is essential for manufacturers supplying inorganic construction products to the Chinese market.* Overseas suppliers must ensure their products meet these mandatory radioactive limits.
Technical requirements
The standard specifies the limits for natural radionuclides, including Radium-226, Thorium-232, and Potassium-40. It introduces the concepts of the internal exposure index and external exposure index to classify and regulate materials. For main building materials, the standard sets specific thresholds for both internal and external exposure indices, with slightly relaxed limits for materials with a hole rate greater than 25%. *These requirements are classified as mandatory clauses in Chapter 3 of the standard.* For decorative materials, the standard establishes a three-tier classification system (Class A, Class B, and Class C) based on their radioactive levels. Class A materials have unrestricted production and usage, while Class B and C materials face strict application limitations. For instance, Class B materials cannot be used for interior finishes in Type I civil buildings such as residential homes and hospitals.
Testing methods
The standard outlines the measurement of specific activity using a low-background multi-channel gamma spectrometer. Sampling requires at least 2kg per sample, which must be crushed and ground to a particle size not exceeding 0.16mm. Measurements are conducted after the radioactive decay chain reaches basic equilibrium. *The measurement uncertainty is required to be no greater than 20% under specified conditions.* Strict adherence to these testing procedures is necessary for valid compliance certification.
FAQs
What products are regulated under GB 6566-2010?
It applies to inorganic non-metallic building materials that have requirements for radionuclide limits, including both main structural materials and decorative finishing materials.
Are the requirements in GB 6566-2010 mandatory?
Yes, the requirements specified in Chapter 3, which include the limits for both main building materials and decorative materials, are mandatory clauses.
How are decorative materials classified under this standard?
Decorative materials are classified into Class A, Class B, and Class C based on their internal and external exposure indices, which determines their permitted usage scope for interior and exterior applications.
The summary above provides a high-level overview of GB 6566-2010. 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 6566-2010 today to access all detailed parameters, formulas, and testing procedures.
Applicability hints
- Type
- Environmental protection
- CCS
- Z70
- ICS
- 13.030.01
- Competent department
- Ministry of Industry and Information Technology
- Technical committee
- Ministry of Industry and Information Technology
Relationships
Replaces:GB 6566-2001