Temperature to consider for gaskets design

[Fran67]

Hello everybody,

When designing the flanges of a piping system, we have to consider the (max) design temperature for the rating selection.
In somes codes, the max temperature to consider for the flange and the bolts is not exactly the same as the fluid temperature, there is ratios for high temperature (80 or 90% of the fluid temperature for example).

There is nothing for the gasket selection (out of codes scope).
Do you know if there is good practices (another standard: NORSOK / API...etc) which help for design temperature to consider for gaskets/o-rings material selection for flanges?
- Maybe a formula as per ASME B31? (x % of the fluid T°)
- Maybe a list of acceptance deviations as per ASME B31? For example: "the max T° is corresponding to the fluid T° of the fluid which could occur during more than x seconds" or "the fluid T° can reach under the max gasket temperature during transient case"...etc

Or maybe the rule is just "the temperature of the fluid"?

Thank you for your help if you have any standard to share
F67

 

[GBTorpenhow]

As the gasket is a wetted component, using the fluid temperature directly seems appropriate.

 

[horacio Torres]

Used the maximum temperature of the fluid to select the gasket.

Horacio

https://www.linkedin.com/company/lagotuy/

 

[r6155]

Also what does the atmospheric environment look like?

Regards

 

[stewbaby]

"suitable for all expected service conditions" so max fluid temp. Never hurts also to consult the manufacture of the gasket you intend to use.