This standard specifies the principle of eddy current flaw detection for seamless steel pipes and welded steel pipes (except submerged arc welded pipes), flaw detection requirements, flaw detection methods, comparison samples, flaw detection equipment, flaw detection equipment operation and adjustment, and flaw detection result evaluation. This standard applies to eddy current testing of steel pipes with an outer diameter of not less than 4 mm. The acceptance level of this standard is divided into A level and 8 level (see Table 1 and Table 2).
GB/T 7735-2004 history
0000 GB/T 7735-2016(XG1-2021)
2016GB/T 7735-2016 Automated eddy current testing of seamless and welded (except submerged arc-welded) steel tubes for detection of imperfections
2004GB/T 7735-2004 Steel tubes-The inspection method on eddy current test
1995GB/T 7735-1995 Steel tubes--The inspection method on eddy current test