GB/T 5677-2018 in English
VALIDCastings—Radiographic testing
- Issued on:2018-09-17
- Implemented on:2019-04-01
- File Format:PDF
- Delivery:Via email within 5 business days
$418.00
《GB/T 5677-2018铸件 射线照相检测》由TC54（全国铸造标准化技术委员会）归口，TC54SC7（全国铸造标准化技术委员会通用基础及工艺分会）执行，主管部门为国家标准化管理委员会。
Introduction
1. Standard Overview
GB/T 5677-2018 "Radiographic Testing of Castings" replaces the previous GB/T 5677-2007. The main changes include expanding the scope of application, adding term definitions and optimizing technical requirements. This standard is equivalent to ISO 4993:2015 and is applicable to the radiographic testing of various metal castings.
2. Comparative Analysis of Standards
| Standard Version | Scope of Application | Main Modifications |
|---|---|---|
| GB/T 5677-2007 | Applicable only to steel castings | No term definition, relatively simple technical requirements |
| GB/T 5677-2018 | Including a variety of materials such as steel, copper and uranium alloys | Added terms and definitions, and detailed technical requirements |
3. Interpretation of Core Technical Requirements
Equipment and Equipment Specifications
The standard explicitly requires the use of radiation detection personnel that conform to GB/T 9445, recommends the use of Co60 or Ir192 as radiation sources, and specifies in detail the film system categories and the requirements for the use of intensifying screens. For example, Table 1 lists the characteristic indicators of different film systems to ensure that the image quality meets the standards.
Transillumination technology classification
It is divided into two levels: Class A (basic) and Class B (optimized). Class A is suitable for general detection, while Class B is used for situations with higher sensitivity requirements. Table 2 shows the adaptation relationship between different radiation sources and film systems to ensure the detection effect.
4. Implementation recommendations
- Staff training:All detection personnel must hold relevant qualification certificates and receive regular radiation safety knowledge training.
- Equipment calibration:Regularly check the optical densitometer and exposure curve to ensure detection accuracy.
- Process optimization: For complex structural parts, it is recommended to use double-wall double-image transillumination technology to improve detection sensitivity.
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