Fixed tube Sheet heat exchangers are the one that are very much
used in process chemical industries and refinery services, as there
is absolutely no chance for intermixing of fluids. This type of
heat exchanger is employed where even slightest intermixing of
fluids cannot be tolerated. A ï¬xed-tubesheet heat exchanger has
straight tubes that are secured at both ends to tube sheets welded
to the shell. The construction may have removable channel covers ,
bonnet-type channel covers , or integral tube sheets. The principal
advantage of the ï¬xedtubesheet construction is its low cost
because of its simple construction. In fact, the ï¬xed tube sheet
is the least expensive construction type, as long as no expansion
joints required. Specifications : The Fixed Tube
sheet design consists of two stationary tube sheets
attached to the shell. The bundle of straight tubes is connected
between the tube sheets and contain baffles to direct the flow
around the tubes in order to generate the required heat transfer. A
head assembly is attached to each tube sheet.
The U-tube design consists of straight length
tubes bent into a U-shape with both ends terminating at the tube
sheet. The tube bundle is fitted with supports or flow baffles. The
tube sheet/tube bundle is placed in the shell and bolted between
the head flange and body flange. A head assembly is required to
direct the fluid into and out of the tube bundle. This
configuration allows for the entire tube bundle to be
removable.Â
