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|
Type of Design |
U-Tube |
Fixed Tube Sheet |
Pull Thru Floating Head |
Outside Packed Floating Head Lantern Ring |
Split Ring Floating Head |
Outside Packed Floating Head |
|---|---|---|---|---|---|---|
|
Relative Cost |
Lowest |
Low |
Median |
High |
Highest |
High |
|
Provision for Thermal Expansion |
Each tube expands freely |
Expansion Joint in shell |
Floating Head |
Floating Head |
Floating Head |
Floating Head |
|
Removable Bundle |
yes |
no |
yes |
yes |
yes |
yes |
|
Replacement Bundle |
yes |
costly |
yes |
yes |
yes |
yes |
|
Replacement Tubes |
Outer rows |
yes |
yes |
yes |
yes |
yes |
|
Tubeside Cleaning |
Chemical |
Chemical & Mechanical |
Chemical & Mechanical |
Chemical & Mechanical |
Chemical & Mechanical |
Chemical & Mechanical |
|
Shellside Cleaning |
Chemical & Mechanical |
Chemical |
Chemical & Mechanical |
Chemical & Mechanical |
Chemical & Mechanical |
Chemical & Mechanical |
|
Double Tubesheet |
Available |
Available |
no |
no |
no |
Available |
|
Tubeside Passes |
Any even number |
any number |
any number |
one or two |
any number |
any number |
|
Internal Gaskets |
no |
no |
yes |
no |
yes |
no |
|
TEMA Designation |
"U" |
"M", "L" or "N" |
"T" |
"W" |
"S" |
"P" |
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