Conventional, dimple, and half-pipe coil jacketed process vessels engineered for precise heating and cooling control — fabricated in stainless steel and specialty alloys to ASME Section VIII for chemical, food, and industrial process duty.
A jacketed vessel is a process tank or vessel fitted with an outer shell — the jacket — that carries a heating or cooling medium in the annular space around the process-side wall, without that medium ever contacting the product. Unlike an agitated reactor, a jacketed vessel doesn't necessarily involve a chemical reaction: it may simply be holding, blending, or storing a product at a controlled temperature. The jacket type selected directly determines heat-transfer efficiency, vessel wall thickness, and installed cost.
Fintelius engineers every jacketed vessel around its heat-transfer duty first — required heat flux, media (water, steam, glycol, hot oil), operating pressure, and vessel orientation — then selects and fabricates the jacket type, internal coils, and insulation package to match.
Every jacketed vessel follows the same disciplined path through the shop, whatever jacket type is specified.
Required heat flux, media, operating temperature range, and vessel orientation are used to size the shell and select the jacket type.
Plate is rolled and heads are formed to the design diameter, dish radius, and wall thickness set by the process duty.
Conventional, dimple, or half-pipe coil jacket is welded to the shell and independently pressure-rated from the process side.
Shell, jacket, and nozzle welds are radiographed and ultrasonically tested; thick sections undergo post-weld heat treatment where required.
Process vessel and jacket are separately hydrostatically tested, insulated, coated, and prepared for shipment.
Each jacket geometry trades off heat-transfer efficiency, pressure rating, and installed cost differently.
An open annular chamber welded around the vessel, with internal baffles directing flow — best suited to smaller vessels up to roughly 300 gallons and to high internal-pressure applications using water or steam.
Thin-gauge stainless steel plug-welded to the shell in a dimple pattern — the dimples induce turbulence for efficient heat transfer while allowing a thinner vessel wall, typically rated to roughly 200 psig at 300°F.
Split-pipe sections wound and welded around the shell — the strongest of the three geometries, rated up to roughly 500 psig, and preferred for high-temperature service with hot oils or high-pressure steam.
Water, steam, glycol, or hot oil circulated through the jacket — media selection is driven by required temperature range and available utility systems.
Full-vessel or partial jacket coverage is selected against the heat flux required and the vessel's available surface area.
Directs jacket-side flow across the full heat-transfer surface, preventing short-circuiting and dead zones in conventional jackets.
Supplemental internal heating or cooling coils add heat-transfer surface area beyond the jacket alone, for high-duty applications.
Where the vessel is also agitated, mixing intensity directly affects the process-side film coefficient and overall heat-transfer performance.
Insulation limits heat loss to ambient; internal linings protect against corrosive or high-purity process contents independent of the jacket.
Plate rolling and head dishing to the design diameter, dish radius, and wall thickness set by process and jacket pressure.
Jacket welded to the shell and independently pressure-rated and tested from the process side of the vessel.
Fill, drain, vent, and instrumentation nozzles with reinforcement pads; manways for internal access and cleaning.
Leg, saddle, or lug supports engineered for horizontal or vertical orientation and full or partial jacket loading.
Corrosion allowance and internal lining selection matched to the process fluid, independent of jacket-side media.
Stress-relief heat treatment for thick-walled shell and jacket sections per code requirements.
Weld integrity verification across shell, jacket, and nozzle welds before hydrostatic test.
Process vessel and jacket are hydrostatically tested separately to their respective design pressures.
Insulation for energy efficiency and personnel protection, plus protective coating systems for the finished vessel.
Blending, holding, and reaction-support vessels requiring precise temperature control across batch cycles.
Process vessels handling temperature-sensitive hydrocarbon streams across production and refining operations.
Sanitary jacketed vessels for controlled heating, cooling, and holding of food and beverage products.
Temperature-controlled process vessels supporting chemical treatment and conditioning stages.
Jacketed process vessels supporting auxiliary chemical and water-treatment systems at power facilities.
Compact jacketed vessels engineered for space-constrained offshore platforms and marine vessel installations.