[Heat Exchanger Model] Heat Exchanger Model Meaning Heat Exchange Equipment Model Daquan
Heat Exchanger Model Meaning
1. Front-end tube box form
A: Flat cover tube box;
B: Head tube box;
C: Tube box for detachable tube bundle and tube sheet;
N: Fixed tube box for tube sheet;
D: Special high pressure Tube box;
2, shell form
E: single-pass shell;
F: double
G: split;
H: double split;
I: U-tube heat exchanger;
J: Split flow without baffle (or condenser shell);
K: Axe reboiler;
O: External diversion;
3. Back-end structure type
L: fixed tube sheet structure similar to A;
M: fixed tube sheet structure similar to B;
N: fixed tube sheet structure similar to C;
P: stuffing box floating head;
S: hook and loop floating head;
T: Withdrawable floating head;
U: U-shaped tubular type;
W: With casing stuffing box floating head;
4. Model and marking of shell and tube heat exchangers
Shell and tube heat exchangers are divided into grades I and II. The grade I heat exchanger adopts higher-grade cold-drawn heat exchange tubes, which are suitable for the occasions where there is no phase change heat transfer and vibration is likely to occur; and general occasions without vibration. The model of the heat exchanger is indicated as follows.
5. Example of heat exchanger type marking
Flat cover tube box, nominal diameter 500mm, design pressure of tube side and shell side are 1.6MPa, Nominal heat exchange area 54m2, high-grade cold drawn heat exchange tube, outer diameter 25mm, tube length 6m, floating head heat exchanger with 4 tube passes and single shell pass, marked as: AES 500—1.6—54—6/25— 4 I
The diameter of the head, the nominal diameter is 700mm, and the design pressure of the tube side is 2.5MPa. The shell side design pressure is 1.6MPa, the nominal heat exchange area is 200m2, the higher-grade cold-drawn heat exchange tube, the outer diameter is 25mm, the tube length is 9m, and the fixed tube plate heat exchanger with 4 tube passes and single shell pass is marked as: BEMB 700—2.5 /1.6—200—9/25—4 I
The hardness of the pipe plugging material shall not exceed the hardness of the pipe material, and the total number of blocked pipes shall not exceed 10% of the total number of pipes in the pipe pass.
