GB/T 39238-2020
Non-destructive testing—Ultrasonic testing—Examination for discontinuities perpendicular to the surface

Standard No.

GB/T 39238-2020

Language

Chinese

Release Date

2020

Published By

国家市场监督管理总局、中国国家标准化管理委员会

Lastest

GB/T 39238-2020

Scope

This standard specifies the discontinuous tandem ultrasonic testing method perpendicular to the surface and the longitudinal-longitudinal-transverse (LLT) ultrasonic testing method. See GB/T39240 for general principles of ultrasonic testing, and GB/T39242 for symbols and definitions. This standard is applicable to metal materials whose upper and lower surfaces are parallel or have coaxial surfaces with a thickness between 40 mm and 500 mm, and is suitable for the detection of discontinuities with a depth greater than 15 mm and perpendicular to the surface. The detection of other materials and smaller thicknesses can be used by reference.

GB/T 39238-2020 Referenced Document

• GB/T 20737 Non-destructive testing-General terms and definitions
• GB/T 20737-2006 Non-destructive testing-General terms and definitions
• GB/T 39240 Non-destructive testing—Ultrasonic testing—General principles
• GB/T 39240-2020 Non-destructive testing—Ultrasonic testing—General principles
• GB/T 39242 Non-destructive testing—Ultrasonic testing—Sensitivity and range setting
• GB/T 39242-2020 Non-destructive testing—Ultrasonic testing—Sensitivity and range setting
• ISO 16811:2012 Non-destructive testing - Ultrasonic testing - Sensitivity and range setting

GB/T 39238-2020 history

• 2020 GB/T 39238-2020 Non-destructive testing—Ultrasonic testing—Examination for discontinuities perpendicular to the surface