NAICS 2022 nationalIndustry USA Verified: Census NAICS 2022 · 2026-01-01

NAICS 333994 — Industrial Process Furnace and Oven Manufacturing

Industrial Process Furnace and Oven Manufacturing

NAICS 333994 is the national industry code for industrial process furnace and oven manufacturing establishments in the United States. The Small Business Administration sets a size standard of 500 for this classification. It forms part of the hierarchical North American Industry Classification System maintained by the Census Bureau.

SBA: 500 View full SBA standard

Related industries in 33399 (All Other General Purpose Machinery Manufacturing)

View parent 33399

333991

Power-Driven Handtool Manufacturing

333992

Welding and Soldering Equipment Manufacturing

333993

Packaging Machinery Manufacturing

333995

Fluid Power Cylinder and Actuator Manufacturing

333996

Fluid Power Pump and Motor Manufacturing

333998

All Other Miscellaneous General Purpose Machinery Manufacturing

Official data

Feature	Description
Official name	North American Industry Classification System (NAICS) 2022
Issuing authority	U.S. Census Bureau with OMB, Statistics Canada, and INEGI
Tax authority	Internal Revenue Service (IRS)
Purpose	Statistical business classification and federal contracting (SAM.gov, SBA standards)
Used in	SAM.gov registration, SBA size determinations, IRS tax classification, SEC EDGAR (via SIC crosswalk)
Active since	2022 (current edition)
Hierarchy level	Sector (2-digit)
Source	https://www.census.gov/naics/