Pipe Hangers

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8 years 6 months ago #9039 by warren203
Pipe Hangers was created by warren203
I am adding supports to a 3" drain line. Is there a minimum distance for hangers to allow movement?
The line is 85 degress process drains. But height restiction is limited. I am adding a full restraint at certain intervals in the line but hangers in between.

WARRREN COX

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8 years 6 months ago #9040 by Jop
Replied by Jop on topic Pipe Hangers
Warren203,
Your post leaves us with some questions:
1- What temperature scale is the 85 degrees, F or C?
2- What is the material and construction of the 3" line?
3- What is the commodity in the line?
4- What kind of structure or building is this?
5- Is this onshore or off shore?

FYI, this is my post # 1000 on pipingdesigners.com but there is no prize, sorry.

Do it once and Do it Right

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8 years 6 months ago #9041 by warren203
Replied by warren203 on topic Pipe Hangers
Hi
The temp is in degree C (85)
The pipe is Stainless 316L fully weleded
The commodity is Process Drains
The building is Steel construction - Pharmaceutical plant
On shore

Thanks

WARRREN COX

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8 years 6 months ago #9042 by Jop
Replied by Jop on topic Pipe Hangers
We are handicapped by not being able to see the complete routing (configuration) and all the potential hanger points.
Based on the information I would only have lateral restrictions at the origin and the terminus points all other supports would be free to move and flex with the fluxing temperature. It is a simple drain and you do not need to make it complicated.

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8 years 6 months ago #9043 by 11echo
Replied by 11echo on topic Pipe Hangers
In "General" I agree with Mr JOP, but there are 2 more issues to look at. S.Stl., at the temp.s you state, grows about 1.2" per 100 ft.- 32% more then regular C. Stl. piping at that temp.The other issue, that seems to be skimmed over, "Process Drain" ...is this just waste water, OR something that is REAL hazardous? IF hazardous then I'd look at doing a stress check on the whole system! SO as stated the system configuration and support points would be VERY important. ...Without knowing more I'd have to assume the more restrictive design effort. ...My $0.02

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8 years 6 months ago #9044 by warren203
Replied by warren203 on topic Pipe Hangers
The drains are Process Drains - Non Hazadous.
The question is maybe misunderstood. The question was regarding the length of the hanger rods themselves.
Is there a minimum length of hanager rod distance? My stress engineer believes that there is a percentage formula for minimum lengths.

Any ideas?

WARRREN COX

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