TEMA Type CEN Exchanger
TEMA Type CEN Exchanger
(OP)
Hello World: Hope y'all are safe from COVID!
I work in the refinery turnaround industry though I don't usually get involved in estimating jobs. I've been around this stuff for about 15 years and seen plenty happening but my focus is elsewhere so I've got what I think is a fairly dumb question:
I am tweaking my company's job estimation templates for exchangers to include some appropriate to every common TEMA Type such as AES, BES, BEU, etc. I have a single Type CEN exchanger in the work scope I am currently working on. Can someone help me understand how the bundle could be removed? I'm looking a a reference chart of the front/shell/rear components and their corresponding TEMA designations; the "C" type front head says "Channel Integral with Tubesheet and Removable Cover (Removable Tube Bundle Only) ... It looks as though the channel head is removable b/c it shows what appear to be centerlines indicating bolts; this is in contract to the Type "N" front head where the channel and shell are fabricated together. All of that makes sense to me EXCEPT - how could we remove the bundle (especially with the rear head having a fixed tubesheet)? Thank y'all!
I work in the refinery turnaround industry though I don't usually get involved in estimating jobs. I've been around this stuff for about 15 years and seen plenty happening but my focus is elsewhere so I've got what I think is a fairly dumb question:
I am tweaking my company's job estimation templates for exchangers to include some appropriate to every common TEMA Type such as AES, BES, BEU, etc. I have a single Type CEN exchanger in the work scope I am currently working on. Can someone help me understand how the bundle could be removed? I'm looking a a reference chart of the front/shell/rear components and their corresponding TEMA designations; the "C" type front head says "Channel Integral with Tubesheet and Removable Cover (Removable Tube Bundle Only) ... It looks as though the channel head is removable b/c it shows what appear to be centerlines indicating bolts; this is in contract to the Type "N" front head where the channel and shell are fabricated together. All of that makes sense to me EXCEPT - how could we remove the bundle (especially with the rear head having a fixed tubesheet)? Thank y'all!
RE: TEMA Type CEN Exchanger
Perhaps the manufacturer had a full diameter tubesheet on one end with a flanged channel that bolts to it? If so the CEN descriptor is definitely wrong but they may have used it to differentiate from a conventional NEN where the tubesheets just get welded directly to the shell and to both channels.
-Christine
RE: TEMA Type CEN Exchanger
RE: TEMA Type CEN Exchanger
https://www.lcec.com/objects/catalog/product/extra...
If it's a CEU exchanger that should be apparent from the drawings/photos as one end of the exchanger will have a flat channel cover and the other end will have a head.
-Christine
RE: TEMA Type CEN Exchanger