Flange type between vessel and heat exchanger 2

[jtseng123]

Dear,
Please see the attached sketch. Shall the body flange between vessel and heat exchanger be TEMA R Class confined joint or a regular ASME B16.47 flange is ok ? Our heat exchanger engineer insists a custom made TEMA R Class confined joint.

 

[SnTMan]

jtseng123, confined joint would be my preference as well. It is possible it is a contractual matter, i.e. the owner of the vessel contracts for the HX and specifies the mating flange. In your example, who is doing what?

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[jtseng123]

SnTMan, there is no contractual matter. It is pure a technical issue. We do not design/specify things beyond code or based on personal preference. Our HX engineer asking a confined custom made joint, which for sure will cost more while (the actual size changed from 30" to 40"). I said to him ASME standard flange shall be fine, less expensive and speed up fabrication without vessel fabricator waiting for the special flange from HX fabricator.

That is the reason I am seeking if it is mandatory to use TEMA confined flange, not to base upon personal preference.

 

[SnTMan]

jtseng123, if T1 is not considered a body flange it is not required to be a confined joint. Matter of agreement among the parties.

My compromise: A spiral wound gasket with outer ring is considered a confined joint by TEMA. Use your B16.47 flange with this gasket. Everybody's happy, no?

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[r6155]

Can you send us more information: design pressure & temp., material...

Regards

 

[jtseng123]

SnTMan, you are correct after I read the TEMA code R-6.5 "Gasket Joint Details", that gasket with solid outer ring is considered as a confined joint. I will give our HX guy a second chance to think about this. Thanks.

 

[SnTMan]

jtseng123, best of luck

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[r6155]

I would never use flange b16.47 in this design.

Regards

 

[SnTMan]

r6155, care to elaborate?

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[r6155]

SnTMan
B16.47 is for welding neck flange. If no more information from (OP) then WN flange is not required.

Regards