Power & Energy
Heat exchangers for power plants in the UAE: HEI-standard condensers, coolers and heat recovery equipment for conventional and renewable generation.
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Service
Tube Replacement & Retubing
Heat exchanger retubing in the UAE: full and partial retubing of exchangers and condensers — thousands of tubes replaced to code, inside planned outage windows.
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How It Works
Retubing replaces the heat exchange surface of an exchanger while retaining shell, heads and structure — restoring the unit to as-new thermal and mechanical condition.
- 1
Eddy current / IRIS survey confirms retube necessity and maps tubesheet condition.
- 2
Old tubes are cut, collapsed and extracted without damaging tubesheet holes.
- 3
Tubesheet holes are cleaned, gauged and reconditioned; grooves restored where required.
- 4
New tubes are installed and secured by controlled rolling expansion, seal welding, or strength welding per design.
Built to
Solve
Engineered against the specific failures that cost operators downtime, contamination or wasted energy.
Asset protection
Plugging is a countdown, not a fix — every plugged tube overloads its neighbours until the bundle can no longer make duty, and the exchanger quietly derates with every subsequent failure.
Process integrity
Aged tubes leak between streams; retubing with upgraded metallurgy resets the corrosion clock, not just the leak — addressing the root cause instead of buying another few months of service.
Operational efficiency
A retube restores 100% of design surface at a fraction of new-equipment cost and lead time, reusing a shell and structure that still has years of service life left in it.
Why Dolphin Group for
Tube Replacement & Retubing
Proven large-campaign record
Thousands-of-tubes condenser and desalination retubes delivered inside planned outages.
Manufacturer’s joint quality
The same qualified procedures we use on new ASME U2 bundles govern every replacement joint.
Material stock and speed
Established supply relationships and Mussafah logistics put tubes on site when the window opens.
Key
Benefits
What sets tube replacement & retubing from Dolphin Group apart, in specific and measurable terms.
- 1
Full surface restored
Restores 100% of design heat exchange surface, undoing years of progressive plugging.
- 2
Fraction of replacement cost
A fraction of the cost and lead time of new equipment, reusing a shell with years of life left.
- 3
Metallurgy upgrades
Metallurgy upgrades engineered to eliminate recurring failures, not just replace like-for-like.
- 4
Controlled expansion
Controlled expansion with recorded wall-reduction — no over-rolled joints left behind.
- 5
Helium leak testing
Helium leak testing available for critical services where a standard hydrotest isn't enough.
- 6
Code-compliant documentation
Site and workshop execution, fully documented to code from first cut to final test.
Technical
Specifications
Design codes, materials and testing scope confirmed for every tube replacement & retubing order.
Tube materials
CS · SS · Duplex · Brass · Cu-Ni · Titanium
Joint types
Roller expanded · seal welded · strength welded
Campaign size
Single tubes to 5,000+ tube condensers
Testing
Torque-controlled rolling · air/soap · helium · hydrotest
Execution
Site crews worldwide · Mussafah workshop
Where It's
Used
Tube Replacement & Retubing in service, sector by sector, application by application.
Water & Desalination
Desalination plant heat exchangers from the UAE: we build high-alloy heat exchange equipment for MSF, MED and RO desalination plants.
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Oil & Gas
Heat exchangers for oil and gas in the UAE: thermal equipment engineered for upstream, midstream and refining service, built and serviced in Abu Dhabi.
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Petrochemicals
Heat exchangers for petrochemical plants in the UAE: we build exchangers and reboilers for crackers, polymer plants and aromatics complexes worldwide.
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Marine & Offshore
Marine heat exchangers built in Abu Dhabi: compact, seawater-tolerant cooling systems for vessels, rigs and offshore platforms.
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Steel & Metallurgy
Steel plant heat exchangers and cooling equipment: furnace cooling, quench systems and dust-laden gas coolers built for the hardest environments in industry.
View SectorFrequently Asked Questions
When shell and structure remain sound — a retube restores full performance for typically 30–50% of replacement cost with far shorter lead time.
As a rule of thumb, beyond about 10% plugged the thermal and hydraulic penalties make retubing the economic choice — confirmed against your duty margin.
Yes — upgrades such as brass to titanium are common and are engineered for tubesheet compatibility and thermal design impact.
Yes — condensers and large exchangers are retubed in place by mobile crews with the same controlled processes as the workshop.
Recorded expansion torque, air/soap or helium leak testing per joint, then full code hydrotest.
A mid-size bundle typically takes 1–3 weeks; large condenser campaigns are planned in shifts to fit the outage.
Yes — certified tube stock with full material certificates, pre-ordered ahead of your window.
Send tube test data or arrange our eddy current survey; we return scope, schedule and tube procurement plan.
Talk to an Engineer About Tube Replacement & Retubing
Send your duty requirements or existing datasheet, and our engineers will confirm the right configuration.