inspection of re-use stud bolt
inspection of re-use stud bolt
(OP)
hi All,
could you inform me some parameter that state a stud bolt can be re used ?
this application for pressure vessel
thanks a lot for the advise
BR
EP
could you inform me some parameter that state a stud bolt can be re used ?
this application for pressure vessel
thanks a lot for the advise
BR
EP





RE: inspection of re-use stud bolt
RE: inspection of re-use stud bolt
1) Fatigue loading leading to microscopic cracks, especially in the bottom of the grooves
2) Over stress leading to plastic deformation and potential work hardening
3) What the actual bolt material is and its yield strength
4) If its been subjected to excess heat or bending
Basically too many unknowns to take the risk of failure compared to the cost of new stud bolts...
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: inspection of re-use stud bolt
I don't have enough question marks for that.
Ask the CFO what he thinks. Even they get it.
Why is it such a problem for engineers?
I hate Windowz 8!!!!
RE: inspection of re-use stud bolt
I hate Windowz 8!!!!
RE: inspection of re-use stud bolt
http://www.fastenal.com/content/feds/pdf/Article%2...
(It should be understood by all that Fastenal, of course, sells fasteners)
The AISC people have instituted a flat ban on bolt reuse.....
http://www.portlandbolt.com/faqs/rules-for-reusing...
Some reasonable rules of thumb for fastener reuse could be developed specifically for each facility.
The rules could involve:
- High Temperature Service
- Cost of Bolt materials
- Corrosive service
- Risk of joint failure
MJCronin
Sr. Process Engineer
Venture Engineering & Construction
www.VentureEngr.com
RE: inspection of re-use stud bolt
I can save you $$$ by only changing the oil in your car every 2-3 years, instead of using the the recommended intervals. Wanna put me in charge of your car maintenance??
RE: inspection of re-use stud bolt
Fasteners are cheap. Failures are expensive.