GB/T 20490-2006
Seamless and welded (except submerged arc-welded) steel tubes for pressure purposes. Ultrasonic testing for the detection of laminar imperfections (English Version)
- Standard No.
- GB/T 20490-2006
- Language
- Chinese, Available in English version
- Release Date
- 2006
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Status
- 2024-03
- Replace By
- GB/T 20490-2023
- Latest
- GB/T 20490-2023
- Scope
- This standard specifies the ultrasonic detection requirements for seamless and welded (except submerged arc welding) steel pipes for lamination defects according to four acceptance levels. Acceptance level B1 (see Table 1) is only applicable to seamless steel pipes used under certain harsh conditions, such as steam collectors. This standard applies to the inspection of steel pipes with a nominal outer diameter greater than 30mm. There is no regulation on the lower limit of steel pipe wall thickness.
GB/T 20490-2006 Referenced Document
- GB/T 9445 Non-destructive testing.Qualification and certification of NDT personnel*， 2015-12-10 Update
- ISO 11484 Steel products — Employer's qualification system for non-destructive testing (NDT) personnel*， 2019-04-01 Update
GB/T 20490-2006 history
- 2023 GB/T 20490-2023 Non-destructive testing of steel tubes Automatic ultrasonic testing of seamless and welded steel tubes for lamination imperfections
- 2006 GB/T 20490-2006 Seamless and welded (except submerged arc-welded) steel tubes for pressure purposes. Ultrasonic testing for the detection of laminar imperfections
