Welded plate heat exchangers

Experience the benefits of a shell & tube design combined with the advantages of conventional plate heat exchangers offered by welded plate heat exchangers. Designed to resist aggressive processes, they are ideal for the petroleum and petrochemical industries.

When conditions are harsh, you need a heat exchanger that can withstand high temperatures and aggressive media. Until recently, most contractors had reached for shell & tube heat exchangers to deal with high pressure and temperatures and corrosive materials. As efficient as they may be, shell & tubes require more energy and more floor space.

Nowadays, engineers are beginning to explore the advantages of welded plate heat exchangers. Offering the thermal efficiency of the shell & tube technology in the plate heat exchanger compact design, welded heat exchangers can achieve a high level of thermal efficiency, in less space and with lower costs.

Design & functions

Welded heat exchangers accommodate a set of circular plates that are welded together and installed into a pressure shell. Manufactured from rugged materials such as stainless steel, this heat exchanger can be used to transfer high temperature or corrosive fluids. Furthermore, due to the flexible selection of flow path and different range of plate types, they are ideal for almost all processes involving thermal process engineering such as oil and gas industries or petrochemicals applications.

Unlike shell & tube heat exchangers, welded heat exchangers are more compact and require less floor space. Due to the compact size, the thermal exchange process is completed faster than in a regular heat exchanger design, resulting in increased operational efficiency. Another benefit of the small-sized design is that the start-up process takes less time than in a shell and tube heat exchanger.

Another great design benefit of welded heat exchangers is that they can be used in tough environments, involving high temperatures or corrosive materials and aggressive media.

Performance at shell & tube pressures with plate design

A traditional gasket plate and frame heat exchanger wouldn’t be able to withstand extreme temperatures, whereas a shell & tube wouldn’t provide the space effectiveness and minimal maintenance of a welded heat exchanger.

Also, welded plate heat exchangers aren’t great just in high heat transfer applications. Due to the high fluid turbulence induced by the corrugated plate pattern, they are resistant to freezing, and, as a result, they are ideal for refrigeration and cryogenic applications.

Besides high thermal efficiency and high heat transfer coefficients, other benefits of opting for welded plate heat exchangers include:

  • Versatility: depending on the application’s demands and challenges, shells can be fabricated from a wide range of materials. Furthermore, the equipment can be manufactured from different metals when one side is exposed to corrosive condition, while the other isn’t;
  • Reliable: unlike gaskets, which can sometimes fail or need to be replaces, welded plates are extremely reliable;
  • Easy to operate with minimal maintenance: welded plate heat exchangers require little maintenance;
  • High safety;
  • Low space requirements.



Designed to withstand high temperatures and aggressive media, welded heat exchangers are excellent for petrochemical and petroleum industries.

  • Oil and gas production;
  • Nuclear industry;
  • Refineries;
  • Petrochemical plants;
  • Condensation and evaporation;
  • Heating and cooling;
  • Heat recovery.


At Mahan’s Thermal Products, you can find a large selection of welded plate heat exchanger systems, components, parts, and other services such as repairing or cleaning from some of the best name in the industry, including Alfa Laval.

Check our selection of welded plate heat exchangers and buy today, or give us a call if you need cleaning or repairing.

If you can’t find what you are looking for, don’t hesitate to contact us. Our team of experts will help you find the solution you are looking for.