2022 NAICS national industry in sector 31-33 Manufacturing

333992 Welding and Soldering Equipment Manufacturing

NAICS 333992 is the US industry code for welding and soldering equipment manufacturing. This U.S.

Code: 333992 (2022 NAICS)
Title: Welding and Soldering Equipment Manufacturing
Part of: All Other General Purpose Machinery Manufacturing
SBA small business limit: Up to 1,250 employees
Closest UK SIC: 25990, 27900 (details)

Changes coming. The NAICS 2027 revision applies to data from 1 January 2027, and SBA proposed new size standards on 20 August 2026. The values on this page are the ones in force today; we update this page when the official files change.

Official definition

This U.S. industry comprises establishments primarily engaged in manufacturing welding and soldering equipment and accessories (except transformers), such as arc, resistance, gas, plasma, laser, electron beam, and ultrasonic welding equipment; welding electrodes; coated or cored welding wire; and soldering equipment (except handheld).

Source: US Census Bureau, 2022 NAICS descriptions.

When to use a different code

Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:

Manufacturing handheld soldering irons are classified in U.S. Industry 332216, Saw Blade and Handtool Manufacturing.
Manufacturing arc-welding transformers are classified in U.S. Industry 335311, Power, Distribution, and Specialty Transformer Manufacturing.

Source: US Census Bureau, 2022 NAICS cross-references.

Activities listed under 333992

The Census index assigns these 16 activities to this code. If your business matches one, this is your code.

Arc-welding equipment manufacturing
Electrode holders, welding, manufacturing
Electrodes, welding, manufacturing
Electron beam welding equipment manufacturing
Gas welding equipment manufacturing
Gas welding rods, coated or cored, manufacturing
Generating apparatus and parts, welding, electrical, manufacturing
Laser welding equipment manufacturing
Plasma welding equipment manufacturing
Resistance welding equipment manufacturing
Seam welding equipment manufacturing
Soldering equipment (except handheld) manufacturing
Spot welding equipment manufacturing
Ultrasonic welding equipment manufacturing
Welding equipment manufacturing
Welding wire or rods (i.e., coated, cored) manufacturing

Source: US Census Bureau, 2022 NAICS index file.

SBA size standard for 333992

To count as a small business for SBA loans and federal contracts under NAICS 333992, your business (including affiliates) must not exceed 1,250 employees. Check your business.

Source: SBA table of size standards, effective March 17, 2023.

Closest UK SIC 2007 codes

There is no official one-to-one link between NAICS and UK SIC. These codes share the same international class (ISIC Rev. 4: 2599, 2710, 2790, 2819), so treat them as a starting point and check the definition.

Built from Census concordances 2022→2017 NAICS and 2017 NAICS→ISIC Rev. 4.

Similar codes to compare

Data last changed November 14, 2026. How this page is built.