GB/T 11345-2013: Non-destructive testing of welds -- Ultrasonic testing -- Techniques, testing levels, and assessment

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Scope

This standard specifies the techniques for the manual ultrasonic testing of
fusion-welded joints in metallic materials with thickness greater than or equal to 8 mm
which exhibit low ultrasonic attenuation (especially that due to scatter) at object
temperatures from 0Ԩ to 60Ԩ. It is primarily intended for use on full penetration welds
where both the welded and parent material are ferritic.
Material-dependent ultrasonic values are specified in this standard, they are based on
steels having an ultrasonic sound velocity of (5920 ± 50) m/s for longitudinal waves
and (3255 ± 30) m/s for transverse waves.
This standard specifies four testing levels, each corresponding to a different
probability of detection of imperfections. Guidance on the selection of testing levels A,
B and C is given in Annex A.
This standard specifies that the requirements of testing level D, which is intended for
special applications, be in accordance with general requirements. Testing level D can
only be used when defined by specification. This includes tests of metals other than
ferritic steel, tests on partial penetration welds, tests with automated equipment, and
tests at object temperatures outside the range 0Ԩ to 60Ԩ.
This standard can be used for the assessment of indications, for acceptance
purposes, by either of the following techniques.
a) assessment based primarily on length and echo amplitude;
b) assessment based on characterization and sizing of the indication by probe
movement techniques.
The techniques used shall be specified.

Basic Data

Standard ID	GB/T 11345-2013 (GB/T11345-2013)
Description (Translated English)	Non-destructive testing of welds -- Ultrasonic testing -- Techniques, testing levels, and assessment
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	J33
Classification of International Standard	25.160.40
Word Count Estimation	48,453
Older Standard (superseded by this standard)	GB/T 11345-1989
Quoted Standard	GB/T 5616; GB/T 9445; GB/T 12604.1; GB/T 19418; GB/T 19799.1; GB/T 19799.2; GB/T 23905; GB/T 29711; GB/T 29712; JB/T 9214; JB/T 10061
Adopted Standard	ISO 17640-2010, MOD
Regulation (derived from)	National Standards Bulletin No. 19 of 2013
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary	This standard specifies the base metal of low ultrasonic attenuation thickness not less than 8mm (especially scattering attenuation) fusion welded joints in metallic materials manual ultrasonic testing techniques. Detecting a temperature of the base mater