Bolt issue

[MERO DZ]

Hi,

In our work site we have a problem in the standard bolt way, when removing the shell end cover for the tube inspection on the Exchanger equipment during a inspection work activities, we continuously encounter problems releasing the nuts from the Bolt stud (welded and cut off).
These exchangers operate at high temperature ( between 160 to 280 Co) which causes the Bolt Studs and Nuts to fuse together & the only way to operate them is to cut the Bolt Stud.
The specification of these Bolts 1" 1/8 x440 mm (A320 GR L7)/ 2H (A194 GR 4).

Waiting your feedback ASAP.
Thank you in advance.

 

[Artisi]

Why post in pump engineering forum?


It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

 

[MERO DZ]

Sorry!!!
I'm new joined.
I don't have a good experience in this work site.
Thank you for the note.

 

[Strong]

Search: high temperature anti-seize compound

https://www.bing.com/search?q=high+...pFXYbq2ofD92kxhmLlKMGfoAKx873bbC42KCX7L4*dP0J

A lot of products are available to minimize thread seizing and galling. 280-C is not expected to "fuse-together" a bolt/stud and nut.

Walt

 

[electricpete]

Try here forum725

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(2B)+(2B)' ?