This document specifies the general requirements, reference specimens, testing instruments and equipment, testing conditions and methods, defect sizing and evaluation, quality grades of steel plates, and testing reports for the ultrasonic testing of thick steel plates. This document applies to the manual and automatic piezoelectric and electromagnetic ultrasonic testing of steel plates with a thickness of not less than 5 mm intended for use in pressure-bearing components, bridges, buildings, shipbuilding, steel structures, pipelines, and similar applications.
Basic Data
Standard ID
GB/T 2970-2026 (GB/T2970-2026)
Description (Translated English)
Method for ultrasonic testing of thick steel plates
Sector / Industry
National Standard (Recommended)
Classification of Chinese Standard
H26
Classification of International Standard
77.040.20
Word Count Estimation
16,156
Date of Issue
2026-07-02
Date of Implementation
2027-02-01
Older Standard (superseded by this standard)
GB/T 2970-2016, GB/T 28297-2012, GB/T 31932-2015
Issuing agency(ies)
State Administration for Market Regulation, Standardization Administration of China
