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 é uma norma nacional chinesa obrigatória que entrará em vigor: Non-destructive testing instruments—Protection rules for industrial X-ray radiographic equipment below 500kV. Setor: Eletrônicos. Foco: Segurança de produtos. Entrada em vigor: 1 de ago. 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 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.

Requisitos técnicos

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.

Métodos de ensaio

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.

Perguntas frequentes

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.

Indicações de aplicabilidade

Tipo: Segurança
CCS: N78
ICS: 19.100
Órgão competente: Ministry of Industry and Information Technology
Comitê técnico: National Technical Committee on Testing Machines of Standardization Administration of China

Relações

Substitui:GB 22448-2008 (Vigente)