Gasket Type between 316L and P11 Flanges, P11 and CS Flanges

[patchlam]

Hi Engineers,

I have a problem with identifying the dissimilar flange materials. I have the two flange connections as shown below:

1. F11 with Carbon Steel Flanges
2. F11 with 316 Stainless Steel Flanges

May I know which of the following below requires the use of insulation kit gasket?

Thank you!

 

[NBrink]

What's the service? Could very well be that neither of the couples need an insulating kit.

In any case, F11 should have a pretty similar potential to carbon steel, wouldn't think you'd want to install an insulating kit between those two.

 

[patchlam]

Hi there, how about the fluid inside is heating medium such as Therminol?

 

[weldstan]

In most petrochem and power generation services, no isolation kits are required for either condition. I have never seen isolation kits used for F11 to carbon steel joints in my 45+ years experience. As per NBrink, service is necessary to fully determine need.