Shell and Tube Steam Heaters

Steam is a ubiquitous heat source in manufacturing and processing plants, and it is used in steam heater shell and tube heat exchangers to transfer thermal energy efficiently to process fluids across a wide range of industrial and hygienic applications. Valutech works with our manufacturing partners to provide custom-built steam heater solutions to suit all of your industrial processing, power generation, chemical manufacturing, food system needs. Most steam heating applications transfer heat to the process fluid through steam condensation and the release of latent heat, providing high heat transfer efficiency and stable temperature control while the steam remains at a nearly constant temperature. Desuperheating of steam (cooling to vaporization temperature) and subcooling (further cooling of condensate) may also be performed to recover additional heat or achieve desired fluid outlet temperatures.

Shell and tube heat exchangers are particularly well suited for steam heating applications due to their ability to accommodate high steam pressures and temperatures through robust welded construction, and their high customizability for many process applications. Typically, steam flows through the shell side of the heat exchanger, while the process fluid flows through the tube side in a U-tube configuration. As steam condenses in the shell, latent heat is transferred across the tube walls to the process fluid flowing through the tube bundle in a controlled path. This arrangement allows steam to condense and drain efficiently while utilizing the large surface area of the tube bundle as the heat transfer surface. Tube-side flow of process fluids also allows for controlled velocity and pressure drop, while fouling can be addressed more easily via mechanical cleaning of removable tube bundles or chemical cleaning. In applications where the process fluid is a slurry, contains fibres, or otherwise has high fouling potential, the process fluid may instead be routed through the more open shell side to reduce the risk of plugging small-diameter tubes.

Our manufacturing partners have the capability to support construction of shell and tube heat exchangers in an extremely wide range of sizes, materials, and design configurations using standard TEMA configurations such as BEU, AES, BEM, and AEU for industrial steam heating applications. Available materials of construction
• 316 Stainless Steel
• Duplex SS
• Other Higher-Grade Alloys
We have the expertise to size and specify the optimal steam heater arrangement for your application using custom thermal sizing based on process fluid characteristics, available installation footprint, allowable pressure drop, operating pressures and temperatures, and fouling tendencies. For example, we support high-parameter operations at temperatures beyond 500°C and pressures up to 800 psig in applications such as utility-scale power generation through robust shell construction and weld joints, reinforced channels and pressure boundary components, increased tubesheet thicknesses, and designs engineered to accommodate thermal expansion and high differential pressures. Each Valutech custom solution is engineered for demanding steam service with consideration for removable or fixed tube bundles, straight or U-tube construction, single or multi-pass tube and shell-side flow arrangements, baffle configuration, expansion joints, vent and drain requirements, and connection typesfor efficient, safe, and sustainable heat transfer in your process application.
Steam heaters commonly use the BEU configuration, with a bonnet-style front head (“B”) for tube-side inlet and outlet connections and a single-pass shell (“E”) design. These features are commonly selected for their simple, compact arrangement and efficientshell-side condensate drainage. Removable U-tube bundles (“U”) are particularly well-suited for steam heating applications because they accommodate thermal expansion caused by large temperature differentials between the steam and process fluid without requiring costly expansion joints or floating heads. The following diagram displays a simplified BEU-style steam heater arrangement, illustrating the flow path and temperature changes of the steam and process fluid:

The cold process fluid enters through the process inlet at the bottom right of the diagram and flows through the length of the tubes before exiting through the process outlet at the top right. Simultaneously, hot steam enters the shell through the upper steam inlet and flows across the exterior of the tube bundle. As the steam contacts the colder tube surfaces containing the process fluid, it condenses and transfers heat across the tube walls to the process fluid. The condensate then exits the heat exchanger through the condensate outlet at the bottom left of the diagram.
Additional configurations options for specialized or process compatibility requirements are available —
please Contact Us for more information.

Hygienic applications require a high level of cleanability and process repeatability to meet validation requirements. In order for steam heaters to meet the strictest sanitary standards and regulatory requirements using sanitary-grade steam, sanitary connections, material finishes, and CIP-validated designs are required. Valutech works with Enerquip, an industry-leading specialist in sanitary shell and tube manufacturing, to specify and supply steam heaters for hygienic applications in the food, beverage, dairy, pharmaceutical, and personal care industries.

In hygienic steam heating applications, straight-tube designs are commonly utilized to promote complete drainability and support validated chemical cleaning and CIP procedures. Conversely, removable U-tube bundle designs are available for applications requiring greater thermal expansion capability and improved access for inspection and maintenance. Enerquip units feature 316 stainless steel construction using: sanitary Tri-clamp or flange connections, removable tube bundles, seal-welding of tubes to tubesheet joints, FDA-compliant O-rings, and various grades of sanitary surface finishes using electropolishing and passivation.