GB22448-2025
Non-destructive testing instruments—Protection rules for industrial X-ray radiographic equipment below 500kV
无损检测仪器 500kV以下工业X射线探伤机防护规则
GB 22448-2025 is an upcoming mandatory Chinese national standard for Non-destructive testing instruments—Protection rules for industrial X-ray radiographic equipment below 500kV. It appears in the Electronics compliance cluster with a product safety focus and has an implementation date of Aug 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 the design, manufacture, installation, and use of industrial X-ray radiographic equipment operating below 500 kV, including fixed, mobile, and portable models. It is mandatory for manufacturers and operators of NDT instruments in China. Non-destructive testing equipment with similar radiation source ranges for non-flaw detection purposes may also refer to this standard.
Technical requirements
The standard specifies comprehensive radiation protection requirements for X-ray machines, focusing on leakage radiation dose equivalent rates at specific distances. It mandates strict safety features for X-ray tubes and controllers, such as beam limiting devices, emergency stop switches, and key-operated security. Manufacturers must ensure shielding materials and connection cables meet specific length and safety criteria to prevent unauthorized radiation exposure. Additionally, the standard outlines protection rules for X-ray inspection workplaces, requiring separate operation rooms, shielded doors with interlocks, and proper ventilation. Refer to GB 18871 for basic standards on ionizing radiation protection.
Testing methods
Radiation protection testing must be conducted using a calibrated dosimeter that meets specific measurement ranges and energy response criteria. Operators are required to perform annual radiation protection inspections for continuously used X-ray flaw detectors. The standard also details area monitoring protocols, dividing mobile workplaces into control zones and supervised areas based on ambient dose equivalent rates.
FAQs
What products are regulated under GB 22448-2025?
It regulates industrial X-ray radiographic equipment operating below 500 kV, encompassing fixed, mobile, and portable NDT instruments.
Are there any updates from the previous version of GB 22448?
Yes, the 2025 version replaces the 2008 edition, adding requirements for X-ray tubes, connection cables, and workplace protection, while updating leakage radiation limits. Manufacturers must transition to the new requirements by August 2026.
How does GB 22448-2025 relate to other radiation standards?
It works in conjunction with GB 18871, which provides the basic standards for ionizing radiation protection and the safety of radiation sources.
The summary above provides a high-level overview of GB 22448-2025. 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 22448-2025 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Safety
- CCS
- N78
- ICS
- 19.100
- Competent department
- Ministry of Industry and Information Technology
- Technical committee
- National Technical Committee on Testing Machines of Standardization Administration of China
Relationships
Replaces:GB 22448-2008 (Current)