Steam Jacketted Check Valve 1

[Piping12345678]

Hi all,

I currently came across on a requirement of 'steam jacketted check valve' on a hydrocarbon line. The intent is to minimize the salt deposition on the line. We are supposed to SHELL DEP v30 as the standard which inturn not clearly defined any material specification steam jacketted valve by its MESC code.
We defined the design parameters and its material suitable for the service in the datasheet and submitted the same for vendor's query.

Now the valve vendor is asking for the requirement as 'Full jacketted' or 'half jacketted'??

Can anyone please explain the terminology of 'full or half steam jacketting' check valve and suggest the suitability to work in a hydrocarbon service?

Thanks in advance

Deepak

 

[QMax1]

Deepak, "Full Jacket" typically refers to oversizing the valve when the jacket is fabricated to the valve. For example, a 3" valve becomes a 3" x 4" fully jacketed valve by removing the 3" flanges and welding 4" flanges (bored for 3"). After that, a "full jacket" is welded to the entire body. This type of jacket offers the most coverage and therefore the most heat transfer. These also work well when you have a 3" x 4" jacketed pipe system.

A "partial jacket" is a jacket that is welded to the body only of the valve. So, the same 3" valve in our example remains a 3" valve and a smaller jacket is welded to the valve. These would be required if you have a 3" standard piping system.

If you want full coverage on a 3" valve without oversizing the flanges to 4", I would suggest a bolt-on jacket. An example can be seen at

http://www.qmaxindustries.com

. Hope this helps. It can be confusing if you are not in the jacketing business.