Custom Shell and Tube Heat Exchangers: Design & Manufacture

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High-integrity thermal solutions for demanding process environments, engineered to TEMA and international standards.

Graham Hart Process Technology designs and manufactures bespoke TEMA-standard shell and tube heat exchangers for high-pressure, cryogenic, and high-fouling environments. With 50+ years of expertise, we provide thermal and mechanical engineering for global process industries.

Graham Hart Process Technology

Manufacturing of High-Integrity Heat Exchangers

Why Choose Shell and Tube Heat Exchangers?

The shell and tube configuration remains the industrial "workhorse" due to its versatility and inherent mechanical strength. At Graham Hart Process Technology, we optimise these units for specific operational challenges:

Extreme Pressure & Vacuum: The cylindrical design naturally withstands pressures ranging from full vacuum to ultra-high pressure.
Temperature Versatility: Expert material selection allows for reliable performance from cryogenic liquefied gases (-196°C) to high-temperature stack gas recovery (+600°C) or even higher.
Fouling Management: We design for easy maintenance, including in-situ cleaning and configurations that allow tubeside access without disconnecting pipework.
Phase Change Expertise: Whether your process requires heating, cooling, condensing, or vaporising, our designs accommodate both single-phase and multi-phase fluids.

Technical Specifications & Capabilities

Feature	Details & Standards
Design Codes	ASME VIII Div 1 & 2 Code Stamped, PD5500, EN 13445
Standards	TEMA (Class R, C, & B), API 660
Configurations	Fixed Tubesheet, U-Bundle, Floating Head, Removable Bundles
Specialist Materials	Stainless Steel, Duplex, Titanium, Hastelloy, Incoloy, Cupro-Nickel, Low Temperature Carbon Steel
Advanced Fabrication	Weld overlay, explosion bonding, semi-automatic tube end welding and precision 20D ratio drilling
Testing & Quality	Full non-destructive testing (NDT), hydrostatic testing, and Notified Body collaboration

High-Pressure & Critical Service Heat Exchangers

Stepping beyond standard fabrication, Graham Hart Process Technology specialises in High-Pressure High-Temperature Heat Exchangers (HPHTHE). Our unique position in the market is defined by:

Precision Engineering: Consistent, repeatable drilling and high-tolerance machining for leak-free performance
Sealing Integrity: Proven gasket sealing methodologies and measured bolt tensioning technology.
Cross-Contamination Prevention: Specialised designs for Bio-Pharmaceutical and lethal service where fluid mixing is not an option.

Frequently Asked Questions

What information is required for a heat exchanger quote?

To provide an optimised thermal and mechanical design, we require:

Fluid flow rates and stream compositions.
Inlet and outlet temperatures.
Physical property data, in available (viscosity, thermal conductivity, specific heat capacity, desity).
Operating pressures and maximum allowable pressure drop.

What is TEMA, and why is it important for heat exchangers?

TEMA (Tubular Exchanger Manufacturers Association) defines the standards for the mechanical design, fabrication, and tolerances of shell and tube exchangers. We manufacture to all three TEMA classes: Class R (Severe/Petroleum), Class C (General Commercial), and Class B (Chemical Process).

Can shell and tube exchangers handle corrosive fluids?

From high pressure viscous polymers to vacuum applications, our engineers are ready to solve your most complex heat transfer challenges.

Ready to Optimise Your Thermal Process?

From high pressure viscous polymers to vacuum applications, our engineers are ready to solve your most complex heat transfer challenges.

Request a Thermal Design Consultation

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