GB/T 3323.2-2019 Translated English of Chinese Standard (GB/T3323.2-2019): Non-destructive testing of welds -- Radiographic testing -- Part 2: X-and gamma-ray techniques with digital detectorsThis part of GB/T 3323 is based on the basic theory and practical experience of digital radiography; specifies the general technology and requirements using computer radiography (CR) technology and digital imaging (DR) technology, which use the digital detector array (DDA), to perform X-and gamma-ray digital detection, for the welded joints of metal materials, including the technical level, general requirements, recommended technologies of X-and gamma-ray digital detection technology (detector system's selection, penetration technology control, image acquisition and display requirements), etc.; specifies the minimum requirements for obtaining digital detection images, which have the equivalent detection sensitivity as the film-based radiographic detection technology, in Part 1 of this standard (GB/T 3323.1). |
Contents
5 | |
Recommended digital radiography technology | 19 |
Testing report | 43 |
Normative Determination method for minimum gray value by | 60 |
Common terms and phrases
100 Lead screen bad pixel basic spatial resolution compensation rule computer radiography contrast sensitivity contrast-to-noise ratio CR detection detection system detector array DDA digital detector array digital image digital radiographic testing display double-wall double-shadow double-wall single-shadow penetration duplex-wire image quality formula gamma-ray GB/T girth welds heat-affected zone image quality indicator image quality indicator's image quality value image spatial resolution increase IP plate cassette lead foil intensifying level B technology measured meet the requirements metal intensifying screen minimum gray value minimum source-to-object distance modulation degree modulation transfer function nominal thickness Non-destructive testing normalized signal-to-noise ratio number of exposures Penetrated thickness w/mm Penetration layout ray source recommended number requirements of Table shown in Figure signal-to-noise ratio source-to-detector distance spatial resolution SRb specified Step-hole type image step-hole-type image quality structure noise surface tested object thickness w/mm Image tube voltage type image quality w/mm Image quality wire pair wire-type image quality X-ray