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Wuxi Yiteng Pressure Vessel Co, Ltd.
Add：No 58, Zhenyang Road, Qingyang Town, Jiangyin, Jiangsu
Contacts：Mr. Zhang
Tel：13506192042
Fax：0510-86557866
Website：www.yitengrq.com
E-mail：wxzhangyaodong@163.com / yeekai@yitengrq.com

AES Heat Exchanger

Technical Specifications of AES Heat Exchanger

(Per TEMA Naming Convention)
The AES Heat Exchanger is a TEMA-standard externally sealed floating head shell-and-tube heat exchanger, designed for high-pressure, high-temperature, and frequent cleaning applications. Below are its technical specifications based on TEMA standards.

1.TEMA Naming Convention Breakdown

AES consists of three letters, each representing a key design feature:

o A: Front Head Type (A = removable flat cover for tube-side access).
o E: Shell Type (E = single-pass shell).
o S: Rear Head Type (S = externally sealed floating head with packing gland).

Example Model: AES-500-120-6/4-2

o 500: Shell diameter (mm)
o 120: Heat transfer area (m²)
o 6/4: Tube-side/shell-side design pressure (MPa)
o 2: Number of tube passes

2. Key Technical Parameters (TEMA AES Standard)

Parameter	Typical Value/Range	TEMA Requirements
Design Standard	ASME VIII Div.1 + TEMA AES	Complies with TEMA Class R/B
Heat Transfer Area	10~1500 m²	Max 1200 m² for tubes ≤12m
Design Pressure (Shell/Tube Side)	0.6~6.4 Mpa (6~64 bar)	Special certification for high-pressure models
Design Temperature	-50°C to +400°C	Special materials required >400°C
Shell Diameter	DN150~DN1200	Shells >1.2m need reinforcement
Tube Bundle Parameters
- Tube OD	Φ19.05 mm (3/4") / Φ25.4 mm (1")	TEMA-recommended sizes
- Tube Length	1.5m / 3m / 6m / 9m	Length-to-diameter ratio ≤10:1
- Tube Layout Angle	30° / 60° / 90°	Triangular pitch preferred
Floating Head Seal	Graphite packing gland + bolted gland	Leakage rate <0.1%
Baffle Type	Single/Double Segmental	25%~35% baffle cut
Nozzle Flanges	ANSI 150~900 / DIN PN16~40	Flange spacing ≥1.5×tube OD

3.Key Structural Features

Externally Sealed Floating Head (S-Type)

o Uses a packing gland to allow thermal expansion and enable full tube bundle removal for cleaning.
o Ideal for fouling-prone fluids (e.g., crude oil, slurries).

Removable Front Cover (A-Type)

o Bolted flat cover for easy tube-side maintenance (e.g., individual tube replacement).

Single-Pass Shell (E-Type)

o Standard shell design with optimized baffle arrangement for shell-side flow.

4.Typical Applications

o Petrochemicals: Crude oil preheaters, vacuum distillation reboilers
o Chemical Processing: Polymer solution cooling, solvent recovery
o Power Industry: High-pressure feedwater heaters (requires periodic descaling)

5. Additional Selection Criteria

1.Thermal Expansion Calculation

o Floating head displacement must be checked if ΔT (shell vs. tube) >80°C.

2.Packing Material Selection

o Graphite for high temperatures (>300°C), PTFE for corrosive media.

3.Tube Bundle Support

o U-tube designs require anti-vibration bars.

6.Comparison with Other TEMA Types

Model	Front Head	Shell Type	Rear Head	Best For
AES	Removable (A)	Single-pass (E)	Packed floating head (S)	High-pressure + cleanable
BEM	Removable (B)	Single-pass (E)	Fixed tube sheet (M)	Clean fluids + small ΔT
BEU	Removable (B)	Single-pass (E)	U-tube bundle (U)	Large ΔT + low maintenance

Note: The AES exchanger's packing gland requires periodic maintenance (recommended seal replacement every 1–2 years).