NAICS 332322

Overview

The North American Industry Classification System (NAICS) is the joint U.S.–Canada–Mexico standard for classifying business establishments to support the collection, analysis, and publication of economic statistics. Developed under the Office of Management and Budget’s Economic Classification Policy Committee and adopted in 1997, NAICS is updated on a five-year cycle; the current vintage is 2022 and is being implemented across Census economic programs through 2027. ¹

NAICS 332322 covers establishments primarily engaged in manufacturing sheet metal work (except stampings). Official collection instruments indicate the industry commonly produces items such as air-conditioning ducts, stove and furnace pipe, roof drainage components, sheet-metal roofing and siding, metal studs, electronic enclosures, roof ventilators, and commercial kitchen sheet-metal equipment. ³

See also on G2X:

• G2X — NAICS 332322 overview
• G2X — NAICS 332321
• G2X — NAICS 332323

What this NAICS covers

• Fabrication of sheet-metal air-conditioning ducts, stove/furnace smoke pipe, and elbows. ³
• Production of aluminum, steel, and other sheet-metal culverts, flumes, and irrigation pipe. ³
• Manufacturing of sheet-metal roofing and roof-drainage components (e.g., eave troughs/gutters). ³
• Fabrication of metal siding and sheet-metal flooring. ³
• Production of sheet-metal awnings, canopies, carports, cornices, domes, copings, soffits, fascia, and shutters. ³
• Manufacturing of steel and aluminum electronic/machine enclosures and housings. ³
• Fabrication of metal studs and HVAC-related sheet-metal work, including roof ventilators and commercial kitchen sheet-metal equipment. ³

Related NAICS and PSC codes

Type	Code	Descriptor
NAICS	332321	Metal Window and Door Manufacturing
NAICS	332323	Ornamental and Architectural Metal Work Manufacturing
NAICS	332431	Metal Can Manufacturing
NAICS	332439	Other Metal Container Manufacturing

Classification boundaries and cross‑references

• On-site fabrication of sheet-metal work is classified in Construction (Sector 23), not in manufacturing under 332322. ²
• Sheet-metal bins, vats, and light tanks fall under 332439; metal cans, lids, and ends are under 332431. ²
• Metal stampings (except automotive, coins) are classified in 33211; automotive stampings are in 336370. ²
• Coin stamping is classified in 339911. ²
• Metal studs are produced within 332322, while structural shapes such as fabricated bar joists are in 332312. ²

Frequently asked questions

• What does NAICS 332322 include?

  • It includes manufacturing of sheet-metal products such as HVAC ducts, roof-drainage components, sheet-metal roofing and siding, metal studs, electronic enclosures, roof ventilators, and commercial kitchen sheet-metal equipment. These products align with Census industry product lines and survey descriptions for the industry. ³

• What activities are specifically excluded from 332322?

  • On-site sheet-metal fabrication falls under Construction (Sector 23). Sheet-metal containers and light tanks are in 332439; metal cans are in 332431; non-automotive stampings are in 33211; automotive stampings are in 336370. ²

• How is NAICS used in federal statistics and contracting?

  • NAICS provides a common industry framework for Census surveys and the Economic Census. The 2022 vintage is being implemented through 2027 to maintain data comparability and reflect industry changes, which informs how agencies tabulate data and align solicitations to appropriate industry codes. ¹

• Did the definition of 332322 change with NAICS 2022?

  • Not specified by official sources. ²

Useful resources

• Census: Implementation of the 2022 NAICS (background, timeline, and definition). ¹
• Census: Manufacturing sector pages (include the formal definition and cross-references for 332322). ²
• Census: 2012 Economic Census “Sheet Metal Work Manufacturing (MC‑33272)” form with detailed product lines. ³
• Census: NAICS search and introductions (official portal). ⁴

References

1. U.S. Census Bureau — The Census Bureau’s Implementation of the 2022 North American Industry Classification System (NAICS). https://www.census.gov/library/reference/code-lists/naics/2022/implementation-timeline.html
2. U.S. Census Bureau — NAICS Manufacturing sector archive pages (include 2022 definitions and cross-references for 332322). https://www.census.gov/naics/resources/archives/sect31-33.html
3. U.S. Census Bureau — 2012 Economic Census, Sheet Metal Work Manufacturing (Form MC‑33272). https://www2.census.gov/programs-surveys/economic-census/2012/questionnaires/forms/mc33272.pdf
4. U.S. Census Bureau — NAICS official search and introduction. https://www.census.gov/naics/?input=ec&year=2022