Heat Exchanger Design, Inc.


Founded in 1984 by Hesham Derazi, Heat Exchanger Design, Inc. has grown from a small 1-2 person organization, primarily assisting customers with thermal design to a sizable manufacturing facility employing 50+ people. Additionally, HED is proud to offer the services of some of the industry’s top engineers, having assembled a design team that is both innovative and flexible when it comes to the customer’s needs. HED, Inc. is an ASME authorized manufacturer. We design and fabricate heat exchangers and pressure vessels according to TEMA, API, ASME Section I and VIII, Division I, and other industry recognized standards as well as offering full compliance with customer specification.



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Shell & Tube Heat Exchanger

Shell & Tube Heat Exchanger

Heat Exchanger Design, Inc. offers shell and tube exchangers starting at 2" IPS in all TEMA types. We design and fabricate to ASME code and TEMA standards. Our shell and tube line utilizes bare tube (straight and u-tubes), helical low-fin outside, longitudinal fins (inside & outside are available). These exchangers are suitable for a variety of applications and are offered in fixed tube sheets or removable bundles. The surface area ranges from (1) square foot to 40,000 square feet. Pressure range is from full vacuum to over 14,000 PSI (limited by size, material and design condition).

Types and applications of shell & tube heat exchangers:

1. Type U – U-Tube Exchangers: These units are constructed using U shape tubes that are attached to the same tubesheet. This design may be used with A, B, C, N, or D type front end.

Advantages:

  1. Tube bundle is removable; therefore mechanical cleaning is possible on the shell side.
  2. Attachment of tubes to single tubesheet eliminates the need for differential expansion joint.
  3. This type is suitable for high pressure.
  4. High degree of protection from leakage is possible.
  5. Double tubesheet is possible to provide further protection from leakage.

Limitations:

  1. Only chemical tube side cleaning is possible.
  2. Access to the tubes other that the outside row is limited.

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