GB/T 5777-2019 Active National standards

GB/T 5777-2019 Automated full peripheral ultrasonic testing of seamless and welded(except submerged arc-welded) steel tubes for the detection of longitudinal and/or transverse imperfections

Publish Date: 2019-06-04 Implement Date: 2020-05-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 5777-2019

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Non-destructive testing methods for metals

ICS Name: Nondestructive testing of metal materials

Publish Date: 2019-06-04

Implement Date: 2020-05-01

Pages: 14 pages

Scope

This standard specifies the requirements for the full-circumference automatic ultrasonic transverse wave detection of longitudinal and/or transverse defects in welded steel pipes, except for seamless steel pipes and submerged arc welding.
Unless the purchaser specifically requires it in the contract, the method generally used is the detection of longitudinal defects.
When conducting the detection of longitudinal defects, the manufacturer may also decide to use Lamb waves for the detection on its own.
For seamless pipes, by mutual agreement between the supplier and the purchaser, the detection principles of this standard can be used to detect defects in other directions.
This standard applies to the ultrasonic detection of steel pipes with an outer diameter of not less than 6 mm and a ratio of outer diameter to wall thickness of not less than 5. For the detection of longitudinal defects in steel pipes with a ratio of outer diameter to wall thickness of less than 5, see Appendix A.
The detection of circular hollow parts can be carried out in accordance with this standard, and the manual ultrasonic detection can be carried out in accordance with this standard.