Brazed Aluminium Heat Exchangers

Printable Version

Fives Cryogenics Equipment BAHX 1-FIVES

Fives' Ultimate Technology for Efficient Heat Transfer Applications

Fives and its Cryogenics | Energy business line provide ultimate performance brazed aluminium heat exchangers (BAHX) based on the renowned Trane technology.

The technology of brazed aluminium plate-fin heat exchangers was developed during World War II in response to the demand for light, compact and efficient heat transfer equipment for the aircraft industry.

In the early 1950's, this technology was adapted to meet the needs of heat transfer equipment for low temperature gas processing and liquefaction plants.

Today, a wide variety of low temperature processes use brazed heat exchangers, and in most cases these exchangers have become an integral part of various plants (air separation units, natural gas processing, LNG etc...).

High Reliability

BAHX provides more than 99.99% availability (i.e. less than 0.01% downtime).

Design Flexibility

A wide range of sizes, configurations and fin types, with design pressures up to 140 bar, allows Fives to offer tailor-made design and optimization through its in-house design and simulation software.

Low Temperature Approaches

Temperature approaches as low as 2-3°C reduce energy consumption. Approaches can even be smaller than 1°C for special applications. Customers can benefit from lower energy consumption.

Key Advantages

  • Compactness and lightness: surface areas per volume up to 2,000 m/ m3 (four to five times as many as conventional exchangers) ; reduced footprints and weights of exchangers. 
  • Mechanical properties of aluminium enhanced at low temperatures.
  • Large temperature gradients from warm end to cold end (up to 200°C).
  • High and low pressure streams can exist in adjacent passages in the same exchanger.
  • More than 10,000 units manufactured since 1959, under successive brands known as Trane, Nordon Cryogenie, Fives Cryogenie and now Fives.


Fives' brazed heat exchanger consists of a block (core) of alternating layers containing corrugated fins, separated by parting sheets. Each layer is sealed along its edges by means of bars; the inlet and outlet ports of each stream are left open.

Fives Cryogenics Equipment BAHX 2-FIVES

After brazing the core in a vacuum furnace, headers and nozzles are welded to allow for connection to the inlet and outlet piping.

Brazed heat exchangers are multi-chamber pressure vessels and are designed and tested in accordance with applicable pressure vessel construction codes and regulations.

⇒ For recruitment-related matters (application, etc.), please do not use this form. Make your requests on this page.

In order to address your request, we need to collect the information listed in the form below

Information on data processing

As a data processor, FIVES implements personal data processing when managing your contact request. The data collected are required for this processing and are retained, unless you object, for a period of 6 months from the last contact between you and FIVES. If the information is incomplete, FIVES will not be able to respond to your contact.

The data collected are exclusively for the use of FIVES departments.

Pursuant to current legislation, you have the right to request access to data concerning you, their correction, deletion and portability, as well as a right of limitation over processing of your data.

These rights can be exercised by email to or by post to the Data Protection Officer at the following address: FIVES, 3 Rue Drouot, 75009 Paris, accompanied by a copy of an identity document.

In case of a dispute involving processing of your personal data, you have the right to make a complaint to the French Data Protection Agency (CNIL).

To find out more about our personal data protection policy click here


Despatch of these emails is managed by a FIVES partner located in the United States, an active member of Privacy Shield. The partner guarantees processing compliant with European requirements for personal data protection. Unsubscribe with a single click on a link in the message received.

* required fields

Your message has been sent and will be treated as soon as possible. Thank you for contacting Fives.

Sorry, we encountered a problem, your message was not sent