Advanced Manufacturing of High-Integrity Heat Exchangers

Our advanced manufacturing facility delivers precision fabrication for high-integrity heat exchangers and pressure equipment. We machine tube sheets up to 2.3 m diameter, weld complex joints to nuclear and subsea standards, and assemble complete units under strict quality controls. Every component is produced with a bespoke Inspection & Test Plan (ITP), ensuring full traceability, industry compliance and reliable delivery of equipment that performs in the harshest operating environments.

Precision Fabrication for Demanding Industrial Environments

Graham Hart Process Technology provides advanced manufacturing services for high-integrity heat exchangers and pressure equipment, delivering precision fabrication under strict quality and regulatory controls.

Our manufacturing capability is engineered to support critical, safety-related and regulated applications, including nuclear, oil & gas, chemical, pharmaceutical and energy sectors.

Manufacturing of High-Integrity Heat Exchangers

Purpose-Built Manufacturing Facility

Our Manufacturing Department operates from a dedicated facility designed specifically for pressure equipment and heat exchanger fabrication.

Fabrication areas fully covered by overhead craneage
Underhook crane height exceeding six metres, enabling assembly of large equipment
Separate fabrication areas for Carbon Steel and Stainless Steel to maintain material integrity
A clean, segregated and secure bay for pharmaceutical and other specialised projects

This layout ensures material segregation, cleanliness and process control throughout manufacture.

Comprehensive Fabrication & Welding Capabilities

Our facility incorporates in-house capabilities for:

Machining
Drilling
Plate rolling
Pressure vessel fabrication

We utilise a wide range of welding techniques associated with pressure equipment manufacture, including but not limited to:

Submerged Arc Welding (SAW)
Manual Metal Arc (MMA)
MIG and Pulse MIG
TIG

Automatic Orbital Welding for Tube-to-Tubesheet Joints

For heat exchanger tube-to-tubesheet welding, we are equipped with advanced automatic orbital welding systems. These use:

Pre-set, validated parameters
TIG welding processes

This produces exceptionally high-integrity, consistent tube-to-tubesheet joints, critical for demanding service conditions.

Wide Range of Materials Expertise

We manufacture heat exchangers and pressure equipment in most combinations of materials, including challenging and specialist alloys.

Materials Commonly Used Include:

Carbon steel and low-temperature steels
Low-alloy steels
Ferritic chromium stainless steels
Austenitic chromium-nickel stainless steels
Duplex and high-nickel stainless steels
Nickel-based alloys (including Hastelloy and Incoloy)
Copper-base alloys
Cupro-nickel
Copper and brass
Titanium
Weld-overlayed and explosively bonded tubesheets
NACE-compliant materials for sour service in the oil and gas industry

This flexibility allows us to engineer equipment precisely matched to process conditions.

Non-Destructive Testing & Quality Assurance

We are able to provide most methods of non-destructive testing (NDT) to customer and code requirements, including:

Radiographic testing
Ultrasonic testing
Hydraulic pressure testing
Halogen leak testing
Dye penetrant testing
Magnetic particle inspection
PIG testing

All work is delivered under a bespoke Inspection & Test Plan (ITP), ensuring full traceability, compliance and confidence in long-term performance.

Finishing & Final Preparation

Heat exchangers, vessels and other process equipment are finished in accordance with customer and project specifications.

Finishing services may include:

Skid mounting
Fluorocarbon lining
Phenolic resin lining
Stress relieving
Shot blasting
Primer painting and specialist paint systems
Stainless steel mechanical and electro-polishing
Sealing
Nitrogen purging
Export packing
Certificates of Origin and export documentation

This ensures equipment arrives fully prepared for installation, commissioning and export.

Integrated Engineering & Manufacturing

Because engineering and manufacturing are delivered in-house, we maintain full control over:

Design intent
Fabrication accuracy
Quality assurance
Delivery performance

This integration reduces project risk and ensures equipment performs exactly as designed.

Discuss Your Manufacturing Requirements

If you require high-integrity manufacturing for heat exchangers or pressure equipment, particularly for high-pressure, high-temperature or corrosive service, our team is ready to support your project.