GB22448-2008
Protection rules for industrial X-ray radiographic equipment up to 500kV
500kV以下工业X射线探伤机防护规则
GB 22448-2008 is a current mandatory Chinese national standard for Protection rules for industrial X-ray radiographic equipment up to 500kV. It appears in the Electronics compliance cluster with a product safety focus and has an implementation date of Sep 1, 2009.
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 the design, manufacture, installation, and use of industrial X-ray radiographic equipment operating at 500 kV and below. It covers various types of equipment, including general structure, fine structure, special protection, and full protection X-ray machines. Compliance with this standard is mandatory for all manufacturers and operators of such equipment in China, excluding only the normative references chapter. It is primarily relevant to the non-destructive testing (NDT) industry.
Technical requirements
The standard specifies stringent leakage ray air kerma rate limits for different categories of X-ray machines, measured at specified distances from the focal point or protective housing. It mandates specific structural protection requirements, including safety interlocks for controllers, X-ray output windows, and shielding materials. Manufacturers must ensure that safety facilities automatically cut off power or shield radiation when protective housings are opened or samples are replaced. Furthermore, it outlines occupational exposure dose limits in accordance with GB 18871-2002, requiring routine personal dose monitoring for workers. The standard also defines the boundaries and signage for control areas and supervised areas to prevent unauthorized access during operation.
Testing methods
Testing involves measuring the leakage ray air kerma rate using protection-level dosimeters under maximum operating conditions specified by the manufacturer. Monitoring instruments must comply with GB/T 17150-1997, featuring specific range, energy response (30 kV to 500 kV), and maximum error limits. Regular monitoring cycles are required: annually for portable and continuously used machines, and biennially for fixed and mobile equipment. Testing environments must maintain a minimum distance of 2m from walls and avoid scattering objects within a 2m radius of the focal point.
FAQs
What products are regulated under GB 22448-2008?
It regulates industrial X-ray radiographic equipment operating up to 500 kV, including general, fine structure, special protection, and full protection types used in non-destructive testing.
Are the requirements in GB 22448-2008 mandatory?
Yes, all clauses except Chapter 1 (Scope) and Chapter 2 (Normative References) are mandatory for design, manufacturing, installation, and usage in China.
What are the monitoring cycles required by this standard?
Portable and continuously used X-ray machines require monitoring once a year, while fixed and mobile X-ray machines must be monitored once every two years.
The summary above provides a high-level overview of GB 22448-2008. 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 22448-2008 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Safety
- CCS
- N78
- ICS
- 13.280, 19.100
- Competent department
- Ministry of Industry and Information Technology
- Technical committee
- Ministry of Industry and Information Technology
Relationships
Replaced by:GB 22448-2025 (Upcoming)