About head radiographic flaw detection
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Regarding the radiographic flaw detection of the head $ D" C2 Q: q& b& T7 E8 P - {) I would like to ask everyone, for heads that are first spliced and then stamped, if the radiographic flaw has been detected before the head is spliced and stamped, is it necessary to perform radiographic flaw detection again after stamping? 3 ^ H1 r7 a( C) X * x . This post was last edited by tulongshao on 2008-1-17 21:36 ]
The welds in the transition zone of the head should be inspected for flaw
Article 6.5.1 of the JB/T4746-2002 standard stipulates that non-destructive testing of spliced joints should be carried out after the head is formed. In other words, flaw detection should not be carried out before stamping, so the problem mentioned by the original poster does not exist.
For flaw detection, the main purpose is to check the quality of the weld after forming.
It is necessary to conduct flaw detection on the weld after stamping
If the flaw detection has been 100% before stamping, then the transition area should be re-inspected after molding to prevent cracks and other defects after molding. If there is no flaw detection before stamping, then 100% flaw detection will be done after molding. Nowadays, most of them should adopt the latter, which is more convenient.
Article 87 of the Regulations: The spliced head should be subjected to non-destructive testing after forming. If non-destructive testing is performed before forming, non-destructive testing should be done in the arc transition area after forming.
answer you first: RT flaw detection is required. The RT inspection before head stamping and suspension pressure is actually a process inspection. That is to say, I cannot press the head with defects, it is an internal control of the manufacturer. The flaw detection after pressing is mandatory to ensure that the head is still in good condition after pressing. R arc segment RT detection will be performed or 100% RT will be performed again as required.