NAICS Code 333994 — Industrial Process Furnace and Oven Manufacturing
National Industry in the official 2022 North American Industry Classification System (U.S. Census Bureau). It is one of 7 national industries under 33399 (All Other General Purpose Machinery Manufacturing).
| Code | 333994 |
|---|---|
| Title | Industrial Process Furnace and Oven Manufacturing |
| Level | National Industry (6-digit) |
| Edition | NAICS 2022 edition |
| SBA size standard | 500 employees |
Official definition (2022 NAICS)
This U.S. industry comprises establishments primarily engaged in manufacturing industrial process ovens, induction and dielectric heating equipment, and kilns (except cement, chemical, wood). Included in this industry are establishments manufacturing laboratory furnaces and ovens.
Is a business under 333994 "small"?
Under the SBA size standards (13 CFR 121.201, effective March 17, 2023), a business classified in NAICS 333994 qualifies as a small business if it does not exceed 500 employees. Small-business status determines eligibility for federal set-aside contracts, SAM.gov certifications and SBA loan programs — employee count is averaged over the latest 24 months.
Where 333994 sits in the hierarchy
| Level | Code | Title |
|---|---|---|
| Sector | 31-33 | Manufacturing |
| Subsector | 333 | Machinery Manufacturing |
| Industry Group | 3339 | Other General Purpose Machinery Manufacturing |
| NAICS Industry | 33399 | All Other General Purpose Machinery Manufacturing |
| National Industry | 333994 | Industrial Process Furnace and Oven Manufacturing |
Related SIC codes
Via the official U.S. Census concordance (1987 SIC ↔ NAICS), shown only where the industry definition is unchanged in NAICS 2022.
| SIC code | Title |
|---|---|
3567 | Industrial Process Furnaces and Ovens |
Related National Industry codes
333991— Power-Driven Handtool Manufacturing333992— Welding and Soldering Equipment Manufacturing333993— Packaging Machinery Manufacturing333995— Fluid Power Cylinder and Actuator Manufacturing333996— Fluid Power Pump and Motor Manufacturing333998— All Other Miscellaneous General Purpose Machinery Manufacturing
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Data: official 2022 NAICS structure, descriptions and Census concordances, U.S. Census Bureau — U.S. government works in the public domain (17 U.S.C. §105). Suggested reference, not an official determination.