2022 NAICS national industry in sector 31-33 Manufacturing
332410 Power Boiler and Heat Exchanger Manufacturing
NAICS 332410 is the US industry code for power boiler and heat exchanger manufacturing. It covers establishments primarily engaged in manufacturing power boilers and heat exchangers.
- Code
- 332410 (2022 NAICS)
- Title
- Power Boiler and Heat Exchanger Manufacturing
- Part of
- Boiler, Tank, and Shipping Container Manufacturing
- SBA small business limit
- Up to 750 employees
- Closest UK SIC
- 25110, 25120, 28110, 28120 and 4 more (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 industry comprises establishments primarily engaged in manufacturing power boilers and heat exchangers. Establishments in this industry may perform installation in addition to manufacturing power boilers and heat exchangers.
When to use a different code
Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:
- Manufacturing heavy gauge metal tanks are classified in Industry 332420, Metal Tank (Heavy Gauge) Manufacturing.
- Manufacturing steam or hot water low pressure heating boilers are classified in U.S. Industry 333414, Heating Equipment (except Warm Air Furnaces) Manufacturing.
- Installing power boilers and heat exchangers without manufacturing are classified in Industry 238220, Plumbing, Heating, and Air-Conditioning Contractors.
Activities listed under 332410
The Census index assigns these 19 activities to this code. If your business matches one, this is your code.
- Aftercoolers (i.e., heat exchangers) manufacturing
- Barometric condensers manufacturing
- Boiler casings manufacturing
- Boilers, power, manufacturing
- Condenser boxes, metal, manufacturing
- Condensers, steam, manufacturing
- Economizers (i.e., power boiler accessory) manufacturing
- Exchangers, heat, manufacturing
- Heat exchangers manufacturing
- Intercooler shells manufacturing
- Marine power boilers manufacturing
- Nuclear control drive mechanisms manufacturing
- Nuclear reactor steam supply systems manufacturing
- Nuclear reactors control rod drive mechanisms manufacturing
- Nuclear reactors manufacturing
- Power boilers manufacturing
- Reactors, nuclear, manufacturing
- Stationary power boilers manufacturing
- Steam condensers manufacturing
SBA size standard for 332410
To count as a small business for SBA loans and federal contracts under NAICS 332410, your business (including affiliates) must not exceed 750 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: 2513, 2819), so treat them as a starting point and check the definition.
- 25110Manufacture of metal structures and parts of structuresUK SIC
- 25120Manufacture of doors and windows of metalUK SIC
- 28110Manufacture of engines and turbines, except aircraft, vehicle and cycle enginesUK SIC
- 28120Manufacture of fluid power equipmentUK SIC
- 28131Manufacture of pumpsUK SIC
- 28132Manufacture of compressorsUK SIC
- 28140Manufacture of taps and valvesUK SIC
- 28150Manufacture of bearings, gears, gearing and driving elementsUK SIC
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.