There are many different types of shell and tube heat exchanger configurations. To help standardize the types of configurations, the Tubular Exchanger Manufactures Association has devised a standard nomenclature to briefly describe heat exchangers. The standard developed by TEMA describes a heat exchanger using three letters. The first letter specifies the front head, second letter, the flow configuration and third letter, the rear head configuration.
TEMA Type Heat Exchanger Configurations
TEMA (Tubular Exchanger Manufacturers Association) has devised a standard nomenclature to briefly describe heat exchangers. The following is a description of the designation.
First Letter
| TEMA # | Description | Example |
|---|---|---|
| A | Channel and Removable Cover |  |
| B | Bonnet (Integral Cover) |  |
| D | High Pressure Closure |  |
| N | Channel Integral with Tubesheet & Removable Cover |  |
Second Letter
| TEMA # | Description | Example |
|---|---|---|
| E | One Pass Shell |  |
| F | Two Pass Shell with Longtidudinal Baffle |  |
| G | Split Flow |  |
| H | Double Split Flow |  |
| J | Divided Flow |  |
| K | Kettle Type Reboiler |  |
| X | Cross Flow |  |
Third Letter
| TEMA # | Description | Example |
|---|---|---|
| L | Fixed Tubesheet Stationary Head |  |
| M | Fixed Tubesheet - Bonnet |  |
| N | Fixed Tube Sheet Channel Integral with Tube Sheet & Removable Cover |  |
| P | Outside Packed Floating Head |  |
| S | Floating Head with Backing Device |  |
| T | Pull Through Floating Head |  |
| U | U-Tube Bundle |  |
| W | Externally Sealed Floating Tubesheet |  |
