Engineered and shop-fabricated air cooled heat exchangers — induced and forced draft units, every header and fin-tube configuration, built to API 661, ASME Section VIII Div. 1 & TEMA for refineries, gas processing, petrochemical, and power plants.
An air cooled heat exchanger (ACHE) — widely known as a fin fan cooler — rejects process heat directly to ambient air instead of cooling water, using banks of finned tube bundles and axial fans mounted on a structural steel bay. Fintelius engineers, fabricates, and tests complete ACHE units and replacement tube bundles for gas compression, gas processing, refining, and power applications.
Every bundle is engineered around the process duty — fluid, pressure, temperature approach, and site ambient conditions — then matched to the header type, fin technology, and draft arrangement that fits the application, and shop-tested before dispatch.
Every ACHE unit or replacement bundle follows the same disciplined engineering-to-dispatch path.
Process conditions and site ambient data are used to size bundle face area, tube length, fin type, and fan duty.
Headers are welded or bolted per the selected design and finned tubes are rolled or expanded into the tubesheet.
Tube bundles are assembled, framed, and mounted into the structural steel bay with plenum and louvers.
Axial fans, fan rings, drive assemblies, and motors are installed and aligned for the specified draft arrangement.
Hydrostatic testing, NDE, and a mechanical running test are performed before the unit is prepared for shipment.
Draft type and bundle arrangement are selected for plot space, noise, and process requirements.
Fans mounted below the bundle push air upward through the tubes — simple fan and drive access for maintenance, and effective in higher ambient temperatures.
Fans mounted above the bundle pull air through the tubes for a more even air distribution across the face area, with a plenum shielding the bundle from solar radiation and weather.
Angled or vertical bundle arrangements reduce plot footprint where site space is restricted, typically paired with forced draft fans.
Header selection is driven by the bundle's design pressure and cleaning/maintenance requirements.
Fully welded box header with removable plugs opposite each tube end for mechanical cleaning — suited to high-pressure, high-temperature service.
Removable cover plate provides full-face access to all tube ends for inspection and cleaning at moderate design pressures.
Fully welded bonnet box for clean, non-fouling services where tube-end access is not required in operation.
Pipe manifold construction distributing flow across multiple tube rows, typical of smaller or lower-pressure bundles.
Pipe-and-bend header construction for simple, economical bundle designs.
D-shaped bonnet header configuration used for specific tube-pass and flow-distribution requirements.
Fin construction is selected primarily on maximum tube-wall operating temperature and fouling environment.
Aluminum strip wound onto the tube under tension — max. operating temperature ~150°C.
Fin extruded from an aluminum outer tube bonded to the liner tube — max. operating temperature ~300°C.
Fin wound into a machined groove and tightly bonded by rolling — max. operating temperature ~400°C.
Knurled L-foot construction for improved fin-to-tube contact and mechanical bond.
Overlapped double L-foot wrap for added mechanical grip and heat-transfer contact area.
Unfinned tube bundles for low-duty or non-fouling cooling & condensing service.
Carbon steel, stainless, duplex, super duplex & titanium tubes with aluminum or galvanized steel fins.
Low-noise axial fans in aluminum, reinforced nylon, or polypropylene, sized to duty and site conditions.
Belt, gear, or direct-drive arrangements with TEFC or variable-speed motors for capacity modulation.
Fabricated support structure carrying the bundle, fans, and plenum, with walkways and access ladders.
Transition ductwork between fan and bundle that ensures uniform air distribution across the face area.
Adjustable louvers for process temperature control in varying ambient conditions.
Plug, cover-plate, bonnet, manifold, or pipe headers fabricated to the specified design pressure.
Vibration switches, bearing temperature detectors, and instrumentation for condition monitoring.
Access platforms and ladders positioned for fan, motor, and header maintenance without process shutdown.
Non-destructive examination, pressure testing, and a mechanical running test verify every unit against design intent.
UT and RT weld examination on headers and pressure-retaining joints per code requirements.
MT and PT surface examination confirming weld and material integrity before hydrostatic test.
Mechanical running test of the fan and drive assembly, including noise and vibration checks, prior to dispatch.
Inter-stage & after-cooling for reciprocating and centrifugal compressor packages, gas gathering & gas plants.
Process coolers, condensers, and overhead condensing service across refinery and petrochemical units.
Steam condensers, turbine lube oil coolers, and closed-circuit water cooling for power generation.