Federal NAICS Codes

NAICS 333994: Industrial Process Furnace and Oven Manufacturing

Explore obligations, trends, recent awards, and incumbent contractors for NAICS 333994.

NAICS 333994 federal market metrics

Total obligations
$880.7M
Total awards
7,154 awards
Active obligations
$97.3M
Size standard
500 employees

What this NAICS covers

NAICS 333994 covers manufacturing industrial process furnaces and ovens used for heat treating, melting, annealing, sintering, and thermal processing, including custom-engineered kiln shells, burners, control panels, and associated refractory linings.

Federal opportunities under 333994 typically involve delivery of factory-built process furnace systems, replacement furnace components, manufacturer drawings, spare parts lists, factory acceptance testing, and performance qualification protocols.

FY2026 snapshot

Obligations
$9.1M
Awards
116
Average award
$78.4K
Change from FY2025
-64%

Recent awards

Search contractors

$88,407

DK FAB, INC.

Forest Service

PIID
12445126P0012
PSC
N037 - INSTALLATION OF EQUIPMENT- AGRICULTURAL MACHINERY AND EQUIPMENT

$217,350

VERDER SCIENTIFIC INC

Department of Energy

PIID
89243326PFE001035
PSC
4430 - INDUSTRIAL FURNACES, KILNS, LEHRS, AND OVENS

$356,000

SURFACE COMBUSTION INC

Department of Energy

PIID
89243326PFE001026
PSC
4430 - INDUSTRIAL FURNACES, KILNS, LEHRS, AND OVENS

$26,775

THERMAL TECHNOLOGY LLC

National Aeronautics and Space Administration

PIID
80NSSC26P1650
PSC
4430 - INDUSTRIAL FURNACES, KILNS, LEHRS, AND OVENS

$44,661

THE GRIEVE CORPORATION

Environmental Protection Agency

PIID
68HE0626P0024
PSC
6640 - LABORATORY EQUIPMENT AND SUPPLIES

$137,923

SHELDON MANUFACTURING, INC.

National Aeronautics and Space Administration

PIID
80NSSC26P1568
PSC
6695 - COMBINATION AND MISCELLANEOUS INSTRUMENTS

$30,333

OXY-GON INDUSTRIES INC

National Aeronautics and Space Administration

PIID
80NSSC26P1458
PSC
6640 - LABORATORY EQUIPMENT AND SUPPLIES

FAQ

What work fits NAICS 333994?
  • Designing and manufacturing box and belt heat-treating furnaces with specified temperature uniformity, atmosphere control, and integrated control panels.
  • Producing vacuum or controlled-atmosphere furnaces for melting and brazing operations, including welded vacuum chambers and seals.
  • Fabricating industrial kilns and high-temperature ovens with specified refractory linings and loading fixtures for sintering ceramic components.
  • Supplying spare furnace components such as burners, temperature controllers, thermocouples, heating elements, and preassembled refractory modules.
When is NAICS 333994 a weak fit?
  • Commercial HVAC or industrial building heating systems: air handlers and building heaters lack the high-temperature process controls and refractory construction of process furnaces.
  • On-site furnace repair and refractory patching contracts: maintenance-only work that does not include manufacturing or supplying new furnace systems falls outside this manufacturing code.
  • Heat-treating service providers and contract processing labs: offering thermal processing for customer parts does not involve manufacturing furnaces and is outside this code.
What solicitation language points to NAICS 333994?
  • Solicitation lists line items for supply and delivery of a furnace model with technical specifications for maximum temperature, atmosphere control, and cooling rates.
  • Evaluation criteria require factory acceptance testing reports, heat-up and soak performance curves, and calibration certificates for temperature sensors.
  • Contract deliverables include manufacturer drawings, refractory specification sheets, spare parts list, and warranty for manufactured furnace equipment.

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