Bolt magnetic particle inspection criteria
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I remember reading somewhere that bolts of size M24 (or M27) and above are required to undergo magnetic particle testing; the main compression components in the Gerong design are of size M36. Please list them out
That’s wrong; UT is used for M36 bolts
According to clause 4.5 of NB/T47027-2012 P103, for flange studs with a nominal pressure greater than 4.0 MPa, magnetic particle testing must be carried out on each stud in accordance with JB/T4730.4 (NB/T47013.4), and they must meet the requirements of grade II.
I’m very sorry; I didn’t intend to post the same message repeatedly. Sometimes the internet connection is poor, and a single click doesn’t work, so when I try again it results in duplication. I’m apologetic!