Author: Senthil Kumar, Technical Director | Updated: July 2026
Table of Contents
- United Heat Exchangers — A Genuine Manufacturer in India
- Our Manufacturing Facility in Coimbatore, Tamil Nadu
- What We Manufacture
- Why Choose United Heat Exchangers Over Other Manufacturers in India
- Trusted by India's Leading Public Sector and Private Industry
- Certifications and Standards We Hold
- Industries We Serve Across India
- From Indian Manufacturer to Global Exporter
- Delivery Timelines and Documentation
- Frequently Asked Questions
- Get a Free Quote
United Heat Exchangers — A Genuine Shell and Tube Heat Exchanger Manufacturer in India
United Heat Exchangers is a shell and tube heat exchanger manufacturer in India, headquartered in Coimbatore, Tamil Nadu, and manufacturing continuously since 1989. Every unit we sell is designed, fabricated, and tested inside our own ASME-certified works — not routed through a subcontracted workshop.
That distinction matters when you're sourcing from India. Several companies that market themselves as manufacturers actually outsource pressure-boundary fabrication to independent job shops with no direct quality oversight. Our ASME U-Stamp, R-Stamp, and U2-Stamp are issued to our own facility — not a subcontractor.
How to Verify a Genuine Manufacturer in India
Before you commit to any supplier, a few quick checks will tell you whether you're dealing with an actual manufacturer or a trading intermediary:
- Ask whose name appears as the certificate holder on the ASME Manufacturer's Data Report — not every seller is entitled to put their own name on it.
- Request photographs of, or a visit to, the actual fabrication shop — not just a design or sales office.
- Confirm that thermal design (HTRI) and mechanical design are carried out in-house, not outsourced to a freelance consultant.
- Check whether the TEMA data sheet is issued and signed in the manufacturer's own name.
Our Manufacturing Facility in Coimbatore, Tamil Nadu
Coimbatore is one of South India's most established engineering manufacturing hubs, built on decades of pump, foundry, and textile-machinery production. That regional ecosystem gives us direct access to skilled welders, machinists, and fabrication engineers that many manufacturers in India cannot draw on locally.
Design & Thermal Rating
Our in-house engineering team runs every job through HTRI Xchanger Suite and prepares the TEMA data sheet before fabrication begins — not after.
Fabrication
Plate and shell rolling, tube-to-tubesheet expansion and welding, with SAW, GTAW, and SMAW welding stations under one roof.
Testing & NDE
Radiography, positive material identification, and a dedicated hydrostatic test bay rated for shell-side and tube-side testing to 1.5× design pressure.
Documentation & Dispatch
MDR compilation, Authorised Inspector sign-off, and export-grade packing — handled in-house before every unit leaves our works.
What We Manufacture
We manufacture the full range of shell and tube heat exchanger configurations — fixed tube sheet, U-tube, floating head, kettle reboiler, and double-pipe units — designed to TEMA-R, TEMA-B, or TEMA-C class depending on the service and buyer specification.
| Heat Exchanger Type | Typical Application | TEMA Class |
|---|---|---|
| Fixed Tube Sheet | General process service, clean fluids, moderate temperature differentials | TEMA-R, B, C |
| U-Tube | High-pressure, high-temperature service; steam heaters; kettle applications | TEMA-R, B |
| Floating Head | Fouling or dirty service where the bundle must be pulled for cleaning | TEMA-R |
| Kettle Reboiler | Distillation column reboiling, evaporation, and vaporisation duties | TEMA-R |
| Double Pipe / Hairpin | Viscous fluids, high fouling, pilot plants, small heat duties | TEMA-R, B |
Materials of construction include carbon steel, stainless steel (304 / 316L / 321 / 904L), duplex and super duplex, copper alloys, titanium, and nickel alloys including Hastelloy and Inconel. Shell diameters range from compact 150 NB units to large-diameter vessels built for refinery and power-plant service.
💡 Our promise: Every shell and tube heat exchanger built in our Coimbatore facility is engineered for the specified duty, fabricated to code, inspected at every stage, and hydro-tested before dispatch — whether the unit ships to a plant in Gujarat or a refinery in Saudi Arabia.
Why Choose United Heat Exchangers Over Other Manufacturers in India
India has no shortage of companies quoting shell and tube heat exchangers. Fewer can back that quote with in-house design authority, code certification issued in their own name, and a documented track record with the country's most technically demanding buyers — its public sector undertakings.
35+ Years, One Product Category
We began manufacturing shell and tube heat exchangers in 1989 — before most current Indian manufacturers in this category existed. Focus, not diversification, is what built our track record.
ASME U, R & U2 Stamp in Our Own Name
Independently audited certification issued directly to our Coimbatore facility, with ongoing compliance requirements — not a stamp borrowed through a partner workshop.
HTRI Thermal Design, Written Guarantee
Every unit is rated using HTRI Xchanger Suite in-house, and we issue a written thermal performance guarantee with every order — not an estimate.
Vendor-Approved by India's Leading PSUs
ONGC, GAIL, NTPC, ISRO, and the Indian Navy have each cleared us through their own technical and quality vendor-approval processes.
Complete Documentation as Standard
MTRs, radiography reports, hydrostatic test certificates, Authorised Inspector sign-off, and TEMA data sheets ship with every order — not as a paid add-on.
All TEMA Classes, All Materials
TEMA-R, B, and C. Carbon steel through to titanium and Inconel. One manufacturer, the complete range your project specification requires.
Sourcing a Shell and Tube Heat Exchanger in India?
Skip the trading layer. Send us your process data and get a technical proposal — thermal rating, material recommendation, and pricing — directly from the people who design and build your unit.
Request My Free Quote →Trusted by India's Leading Public Sector and Private Industry
India's public sector undertakings run some of the strictest vendor-approval processes of any buyer segment in the country, covering technical capability, quality systems, and financial standing before a manufacturer is even permitted to quote. Passing that scrutiny is a credential in itself.
We are listed as an approved vendor with each of these organisations. Specific project details remain confidential under client agreements; references are available on request during your technical evaluation.
Certifications and Standards We Hold
These certifications matter whether you're buying domestically or importing into another country. Many Indian EPC contractors now specify ASME-stamped equipment even for projects inside India, since global partners and lenders require it — and PED applies if your project routes through a European EPC.
Industries We Serve Across India
Shell and tube heat exchangers manufactured in our Coimbatore facility are in service across India's refineries, petrochemical complexes, power plants, and process industries, alongside marine, pharmaceutical, and desalination applications supplied both domestically and for export.
| Industry | Typical Application |
|---|---|
| Refineries | Crude preheating, overhead condensers, product coolers, reboilers on distillation columns |
| Petrochemicals | Reactor effluent cooling, monomer condensers, solvent recovery |
| Power Generation | Feed water heaters, lube oil coolers, closed cooling water coolers, hydrogen coolers |
| Chemical Plants | Process heating and cooling, condenser duties, acid coolers, solvent heaters |
| Pharma | API synthesis cooling, WFI generation, clean steam heating, solvent recovery in batch reactors |
| Marine & Shipbuilding | Engine jacket water cooling, lube oil cooling, central cooling systems |
| Desalination | Brine heaters, distillate coolers, steam condensers in MED and MSF plants |
| Industrial Manufacturing | Compressed air cooling, hydraulic oil cooling, process cooling for general industry |
From Indian Manufacturer to Global Exporter
While this page focuses on our manufacturing base in India, the same Coimbatore facility exports to more than 20 countries, including the United States, Saudi Arabia, the UAE, Germany, and Australia. For a full country-by-country breakdown of our export capability and documentation, see our guide to exporting heat exchangers from India.
Delivery Timelines and Documentation
What's Included with Every Order
- Written thermal performance guarantee — HTRI-rated, issued with every unit
- ASME documentation package — Manufacturer's Data Report (MDR), material certifications (MTRs), weld records, NDE inspection reports
- Hydrostatic test certificate — tube side and shell side tested to 1.5× design pressure; third-party witness available
- Material traceability documentation — mill test reports for every pressure-retaining component, traceable to the heat number
- TEMA data sheet — fully completed to TEMA standard format, issued in our own name
- Lifetime technical support — direct OEM engineering assistance for re-rating, bundle replacement, and troubleshooting
Frequently Asked Questions
Who is a genuine shell and tube heat exchanger manufacturer in India, as opposed to a trader?
A genuine manufacturer designs, fabricates, and tests the pressure vessel inside its own facility, and holds code certifications — such as the ASME U-Stamp — in its own name. A trader resells or subcontracts fabrication to a third party. Ask to see the certificate holder's name on the Manufacturer's Data Report, and request photographs or a visit to the actual fabrication shop before you commit.
Where is United Heat Exchangers' manufacturing facility located?
Our facility is in Coimbatore, Tamil Nadu, operating continuously since 1989. Design, fabrication, NDE, and testing are all carried out in-house, at the same site where our ASME U, R, and U2 Stamps are held.
What certifications should I check before selecting a manufacturer in India?
For sale and operation in the United States and Canada, the ASME U-Stamp (ASME BPVC Section VIII) is a legal requirement. For Europe, the Pressure Equipment Directive (PED) applies. Confirm the TEMA class — R, B, or C — matches your service classification, and check that the manufacturer holds ISO 9001:2015 for quality management.
What is the difference between fixed tube sheet, U-tube, and floating head designs?
In a fixed tube sheet exchanger, the tube sheets are welded directly to the shell, giving the most compact and lowest-cost design but requiring expansion bellows for large temperature differentials. In a U-tube design, only one tube sheet is required — the U-bend accommodates thermal expansion, making it preferred for high-pressure and high-temperature service. In a floating head design, one tube sheet is free to move inside the shell, allowing the bundle to be pulled for inspection and cleaning — essential for fouling or dirty service.
How much does a shell and tube heat exchanger cost in India?
Cost depends on shell diameter, material of construction, TEMA class, design pressure and temperature, and the level of documentation and third-party inspection required. Alloy materials such as titanium or Hastelloy cost significantly more than carbon steel or standard stainless. Share your process data and we'll return budgetary pricing within 48 hours.
What is the typical lead time from an Indian manufacturer?
Standard carbon steel or stainless steel fixed tube sheet and U-tube units typically ship in 6–10 weeks. Floating head designs, alloy materials, and large-diameter shells generally take 10–16 weeks. Expedited schedules can be arranged for shutdown or turnaround projects — contact us with your timeline.
Author: Senthil Kumar, Technical Director — United Heat Exchangers Pvt. Ltd. | Last Updated: July 2026
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