GB/T 25758.4-2010
Non-destructive testing.Characteristics of focal spots in industrial X-ray systems for use in non-destructive testing.Part 4:Edge method (English Version)

Standard No.: GB/T 25758.4-2010
Language: Chinese, Available in English version
Release Date: 2010
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 25758.4-2010
Replace By: SAE MA 3302C-2014

Scope: This part of GB/T 25758 specifies a method for verifying focal spot sizes greater than 0.5 mm for industrial X-ray systems with tube voltages up to 500 kV using sharp-edged radiographic negatives. The image quality and resolution of an X-ray image largely depend on the characteristics of the focal point. The focal imaging quality is based on the two-dimensional intensity distribution at the target plane. The marginal method is particularly effective for verifying focus under field conditions, and for detecting changes in focus. This method cannot be used for absolute measurement of focal spot size.

GB/T 25758.4-2010 Referenced Document

GB/T 19348.1 Non-destructive testing.Industrial radiographic film.Part 1:Classification of film systems for industrial radiography*， 2014-06-24 Update
GB/T 19802 Non-destructive testing.Industrial radiographic illuminators.Minimum requirements
GB/T 25758.1 Non-destructive testing.Characteristics of focal spots in industrial X-ray systems for use in non-destructive testing.Part 1:Scanning method

2010 GB/T 25758.4-2010 Non-destructive testing.Characteristics of focal spots in industrial X-ray systems for use in non-destructive testing.Part 4:Edge method