Pressure Vessels

Each pressure vessel that we manufacture is per the American Society of Mechanical Engineers (ASME) code. As a leading ASME pressure vessels manufacturer, our specialty lies in working with a variety of alloys, pressures, & designs to meet your custom requirements. More »

Weld Overlay and Clad Vessels

Our weld overlay and clad vessels are fully code-compliant. We use our advanced welding techniques to their full capabilities to offer you the finest overlay/clad components and pressure vessels. More »

High Pressure Vessels

We hold the American Society of Mechanical Engineers (ASME) U, U2, and U3 stamps, and have the capabilities and resources to manufacture ASME high pressure vessel to your exacting specifications. More »

Autoclaves

We hold the American Society of Mechanical Engineers (ASME) U, U2, U3, PP, & S stamps, and have the capabilities and resources to manufacture autoclaves to your exacting specifications. More »

Heat Exchangers

We specialize in the design, engineering, and fabrication of Shell and Tube Heat Exchangers, including thermal calculations. All of our units are built in strict accordance with the latest edition and addenda of the A.S.M.E. Code, Section VIII Division 1, 2, or 3 and T.E.M.A.” More »

 

Factors to Know About Shell and Tube Heat Exchangers

We may be surprised at the fact that heat exchange is a process that we encounter in our everyday life in some form or another. The term simply means that heat is consistently being transferred from one source to another through some medium. The most common examples of heat exchangers can be air conditioners, coolers and heaters, car radiators, refrigerators and so on. From the industry point of view, heat exchangers like condensers and boilers are useful devices that are widely employed for large scale processes. Having undergone multiple improvements and innovations, present-age heat exchangers are considered to be highly efficient and performance-driven. The blog would discuss about a specific type known as shell and tube heat exchangers.

shell tube heat exchanger

A General Description on How they Operate

Commonly suited for high-pressure applications, shell and tube heat exchangers are one of the most popular heat exchangers used in oil refineries and other chemical processes. As the name suggests, this heat exchange equipment consists of a shell or a large pressure vessel fitted with a bundle of several types of tubes inside it. The device operates as fluids of varied temperature flow through and over the tubes and heat is transferred from one fluid to another through the tube walls. This fluid can be either in the form of liquid or gas, and experts prefer the usage of a large heat transfer area along with several tubes to enhance the efficiency of the process.

The flexibility of shell and tube heat exchangers allow for a wide range of temperatures and pressures and the heat exchanger comes in 2 main categories namely:

  1. Heat exchangers used in petrochemical industry. These require covering the standards from TEMA (Tubular Exchanger Manufacturers Association).
  2. Heat exchangers for the power industry like power plant condensers and feedwater heaters.

Regardless of the categories, heat exchangers ideally consist of four major parts:

  1. Front or stationary header (the area where the fluid enters the tubeside of the exchanger)
  2. Rear header(the area where the tubeside fluid returns to the front header in exchanger)
  3. Tube bundle (consists of the tubes, tube sheets, baffles and tie rods)
  4. Shell (containing the tube bundle)

Typical Applications

Shell and tube heat exchangers are used for some typical industrial applications. Some of them are listed below:

  • Petrochemical projects
  • Power plant operations
  • Waste heat recovery
  • Exhaust gas heat recovery
  • Oil transformer cooling
  • Steam heating
  • Solvent/distillate process
  • Ethanol mash/stillage
  • CIP heaters
  • Yeast coolers

Ideally made of strong anti-corrosive metals, shell and tube heat exchangers can also be made of graphite, glass or plastic in case these are involved in handling strong acids or pharmaceuticals.

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