GB/T 26642-2022 (English Version) PDF

Scope: This document specifies the basic techniques of computed radiography in order to obtain satisfactory results economically and reproducibly. The technology is based on the basic theory of detection and experimental measurement. This document specifies general rules for industrial computer-based X- and gamma-ray inspection using stored phosphorescent imaging panels (IP). This document is based on the fundamentals of film-based radiographic inspection of metallic materials as defined in ISO 5579. The basic settings of radiation source, detector and their corresponding geometric positions comply with ISO5579 and related product standards, such as welding seam standard ISO17636 and casting standard EN12681. This document does not specify default acceptance terms. Computed radiography (CR) systems provide digital grayscale images that can only be viewed and evaluated on a computer. This document establishes recommended principles for the selection of detectors and radiographic inspection. Important elements such as computers, software, monitors, printers and viewing conditions are not the main content of this document. This document specifies the minimum requirements for computed radiography and digital images to obtain detection sensitivity equivalent to the deficiencies of film-based radiography detection as defined in ISO 5579. Certain application standards, such as EN16407, provide testing conditions that may require different or less stringent requirements.

GB/T 26642-2022 Referenced Document

GB/T 21355-2022 Non-destructive testing—Industrial computed radiography with storage phosphor imaging plates—Classification of systems
ISO 16371-1 Non-destructive testing - Industrial computed radiography with storage phosphor imaging plates - Part 1: Classification of systems
ISO 19232-1 Non-destructive testing - Image quality of radiographs - Part 1: Determination of the image quality value using wire-type image quality indicators
ISO 19232-2 Non-destructive testing - Image quality of radiographs - Part 2: Determination of the image quality value using step/hole-type image quality indicators
ISO 19232-5 Non-destructive testing - Image quality of radiographs - Part 5: Determination of the image unsharpness and basic spatial resolution value using duplex wire-type image quality indicators
ISO 5579 Non-destructive testing.Radiographic testing of metallic materials using film and X- or gamma rays.Basic rules
ISO 5580 Non-destructive testing*， 2023-11-01 Update

2022 GB/T 26642-2022 Non-destructive testing—Industrial computed radiography with storage phosphor imaging plates—General principles for testing of metallic materials using X-rays and gamma rays
2011 GB/T 26642-2011 Non-destructive testing.Test method for computed radiography of metallic materials