Shell and Tube Heat Exchanger / Tube and Shell Heat Exchanger

Effectively transfers heat between fluids in your industrial process, optimising energy consumption in a safe and efficient way.
This type of exchanger allows energy transfer between two pressurised fluids without them coming into contact. This is achieved by circulating the fluids through separate chambers (shell and tubes), enabling safe and efficient heat exchange without mixing.

AITESA designs and manufactures shell and tube heat exchangers in compliance with ASME VIII Div.1 code and European standard EN-13445.

How Does a Shell and Tube Heat Exchanger Work?

A shell and tube heat exchanger brings two fluids (one hot, one cold) into thermal interaction under pressure, allowing heat to transfer by convection through the heat exchange tubes.

Shell and tube exchangers are divided into:

Tube Side: A closed circuit primarily made up of a bundle of smooth tubes. Depending on the equipment configuration, this side can have various designs:
- If the tube bundle consists of U-tubes, a single inlet/outlet head is used, separated by a partition plate to keep both chambers (inlet and outlet) independent within the same head.
- If the bundle consists of straight tubes, there are two heads, one on each end of the bundle.
Shell Side: A closed circuit where fluid flows outside the tube bundle, within the shell. Depending on the type of fluids and required service, this circuit may use baffles to redirect the flow and improve efficiency.

Types of Shell and Tube Heat Exchangers – Which One Do You Need?

Depending on process needs, available fluids, and space constraints, the exchanger is custom-designed to suit the client’s requirements. All types of exchangers are manufactured to TEMA standards.

Key design factors:

Type Selection: Choosing the correct type of exchanger is essential, depending on the application (evaporation, condensation, or heating/cooling without phase change).
Geometry: Once the type is chosen, the layout and size of the tubes are studied, as they directly affect heat exchange efficiency. Design aims to:
- Ensure uniform flow and minimise fouling, which can impair heat transfer.
- Provide proper flow speed and direction to avoid dead zones or excessive turbulence, improving efficiency.
Materials: Proper material selection is critical to ensure chemical compatibility and corrosion resistance. Thermal properties also play a key role in efficient heat transfer.

Not sure which exchanger you need?
Our expert team can analyse your process and recommend the best solution.

At AITESA, we are experts in the design of shell and tube heat exchangers

Key Benefits for Your Industry

Tailored to Specific Plant Requirements
Thanks to their modular design and a wide range of available configurations, shell and tube heat exchangers can be precisely adapted to the operating conditions of each facility, ensuring optimal performance.
High Versatility and Flexibility
These systems can operate with various combinations of materials, pass arrangements, tube layouts, and flow orientations (counterflow, crossflow, parallel).
Robust Construction
Typically built from carbon steel, stainless steel, or special alloys, they withstand extreme operating conditions such as high pressures, aggressive temperatures, and corrosive media, making them ideal for demanding industrial environments.
Simple Operation
Shell and tube exchangers have a straightforward and reliable working principle, reducing the need for complex control systems and simplifying integration into existing plants.
High Thermal Efficiency
Their design maximises heat exchange area within a compact volume, improving thermal performance.
Design Flexibility
They can handle clean or dirty fluids, single or two-phase flows, and varying thermal transfer requirements. Features like multi-pass designs, removable heads, and mechanical or chemical cleaning options are available as needed.
Ease of Maintenance
Removable heads (when required) allow direct access to the tubes for periodic inspections, cleaning, and repairs, reducing downtime and supporting continuous, cost-effective operation.
Long Service Life
With proper maintenance and correct material selection based on fluid and operating conditions, these exchangers can operate efficiently for decades.
Reduced Operating Costs
Their high thermal efficiency, low maintenance needs, and long lifespan help reduce energy use and operating costs. Custom designs prevent oversizing and allow for future upgrades or process changes.

Equipo carcasa y tubo en preparacion para el transporte

Shell and tube unit being prepared for transport

Haz de tubos de un intercambiador carcasa y tubo

Tube bundle of a shell and tube heat exchanger

Industries Using Shell and Tube Heat Exchangers

Petrochemical and Gas
Used for cooling, heating, condensing, and heat recovery in high-pressure, high-temperature hydrocarbon and gas processes.
Power Generation
Employed in thermal and nuclear plants for heat exchange between steam, water, and other heat transfer fluids.
Concentrated Solar Power
Used in systems transferring heat between molten salts, thermal oils, and steam, enabling efficient energy storage and recovery.
Chemical and Pharmaceutical
For temperature control in reactions, vapour condensation, and maintaining stable and safe thermal conditions.

Key Factors When Selecting the Right Exchanger

Sizing and Capacity

Heat load
Space constraints
Compatibility with existing installations

Process Conditions

Flow rates of both fluids
Inlet and outlet temperatures
Pressures
Fouling factor

Fluid Type

Phase: Liquid, vapour, or two-phase
Nature of fluid:
- Thermal fluids (oils, molten salts)
- Gases or vapours
- Industrial liquids
- Hydrocarbons

International Standards Compliance

Thermal design per TEMA recommendations
Mechanical calculations per standards:
- ASME VIII Div.1
- EN-13445
- AD 2000

Client Specifications

Customised to meet specific client requirements

Despiece de unintercambiador carcasa y tubo

Exploded view of a shell and tube heat exchanger

At AITESA, we analyse your case to offer you the most suitable shell and tube heat exchanger

Carcasa y tubo de media presion en proceso de fabricacion

Medium-pressure shell and tube unit in the manufacturing process

Why Choose a Shell and Tube Heat Exchanger from AITESA?

Over 5,000 Projects in Strategic Sectors
- 40 years of experience designing shell and tube heat exchangers
Maximum Efficiency
- Custom designs that optimise cost and performance
- High thermal efficiency through optimised configurations
- Proven, robust, and safe solutions backed by extensive industry knowledge
- Reduced operating costs through heat recovery systems and precise material selection
Comprehensive Technical Support and Maintenance
- Maximum uptime via preventive and corrective maintenance, and field inspection services
- Rapid response, guaranteed spare parts, and ongoing support to minimise downtime
- Technical assistance for troubleshooting, redesigns, or process adaptations
At AITESA, we don’t just manufacture exchangers – we develop efficient thermal solutions that enhance your productivity, cut costs, and ensure compliance with environmental and regulatory standards.

Frequently Asked Questions

What information do I need to provide for a quotation?

You should specify the fluid types on both sides, inlet temperatures, heat duty, flow rates, operating pressures, installation type, space constraints, and any material restrictions due to corrosion or standards.

Can they handle corrosive or contaminated fluids?

Yes. They can be built using corrosion-resistant materials such as stainless steel, titanium, or Hastelloy. The choice depends on the fluid and the chemical and thermal conditions.

What is the estimated lifespan of a shell and tube exchanger?

With proper design and regular maintenance, they can operate for over 25 years. Lifespan greatly depends on operating conditions, material quality, and fluid treatment.

What type of maintenance do they require?

Periodic inspections, tube cleaning (mechanical or chemical), gasket checks, and leak testing. Units with removable heads allow easier and more effective cleaning.

How long does it take to manufacture a custom exchanger?

Since these are tailored to client requirements, lead time varies with design complexity and materials. Typical times range from 20 to 36 weeks.

What advantages do they have over other types of exchangers?

They offer high pressure and temperature resistance, easy maintenance, flexible design, compatibility with dirty or corrosive fluids, and large heat transfer capacity.

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Aitesa cuenta con más de 40 años de experiencia diseñando y suministrando calderas de recuperación de calor.

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