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#76262 - 02/21/22 11:39 AM Untied Universal expansion joint middle spool weight
charlot Offline
Member

Registered: 05/08/13
Posts: 101
Loc: france
Hello Everyone,

When I use an Untied Universal expansion joint, should I add a support for the middle spool or it's somehow designed to be self supporting?

Thanks

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#76266 - 02/24/22 12:18 AM Re: Untied Universal expansion joint middle spool weight [Re: charlot]
NRAM Offline
Member

Registered: 01/31/12
Posts: 68
Loc: Malaysia
Generally, EJ vendors consider the weight of the middle spool in the design of a universal expansion joint. The weight is often handled with bellows' stiffnesses or transfers to control rods by some lugs. It means providing separate support for this spool is not in the piping designer's scope of work except in a special situation.
_________________________
Regards,

The shortest answer is doing

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#76283 - 02/28/22 02:25 PM Re: Untied Universal expansion joint middle spool weight [Re: NRAM]
charlot Offline
Member

Registered: 05/08/13
Posts: 101
Loc: france
Thank you NRAM

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#76303 - 03/07/22 12:58 PM Re: Untied Universal expansion joint middle spool weight [Re: charlot]
Michael_Fletcher Offline
Member

Registered: 01/29/10
Posts: 1000
Loc: Louisiana, US
You shouldn't support it, but you should still account for its weight for other aspects of the design.

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#76306 - 03/07/22 03:02 PM Re: Untied Universal expansion joint middle spool weight [Re: charlot]
danb Offline
Member

Registered: 04/22/05
Posts: 1426
Loc: ...
It depend on the size. Maybe pantograph link...

It is not often you can use an Untied Universal expansion joint, so you need to be careful.

Best regards,
_________________________
Dan

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