Analysis
NAICS 33241 is the 2022 NAICS industry for power boiler and heat exchanger manufacturing, part of 3324 (Boiler, Tank, and Shipping Container Manufacturing).
It has only one more detailed code, 332410, which covers exactly the same activities; the definition, index entries and statistics are on that page.
Between 2018 and 2023 the number of establishments fell 24% and employment rose 5%. The 2018 count used NAICS 2017, so part of a large move can come from codes being redefined rather than from businesses opening or closing.
County Business Patterns counts 237 US establishments in this code in 2023, employing 23,734 people at an average annual payroll of $81,690 per employee (70th percentile of national industries). 9% of the establishments have fewer than five employees, which points to larger operations.
By establishments it ranks 3rd of the 3 codes at this level within Boiler, Tank, and Shipping Container Manufacturing, with 17.7% of them.
Official definition
See industry description for 332410.
Source: US Census Bureau, NAICS 2022 Manual.