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IRS Business Activity Codes
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NAICS 2002 Codes
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SIC Codes
NumberDescriptionNumberDescriptionNumberDescription
333900Other General Purpose Machinery Manufacturing 333992Welding and Soldering Equipment Manufacturing
Also called:
Plasma welding equipment manufacturing
Laser welding equipment manufacturing
more detail...
3548Electric and Gas Welding and Soldering Equipment
3699Electrical Machinery, Equipment, and Supplies
335310Electrical Equipment Manufacturing 335311Power, Distribution, and Specialty Transformer Manufacturing
Also called:
Transformers, separate solid-state arc-welding, manufacturing
Arc-welding transformers, separate solid-state, manufacturing
3548Electric and Gas Welding and Soldering Equipment
811310Commercial & Industrial Machinery & Equipment Repair & Maintenance 811310Commercial & Industrial Machinery & Equipment Repair & Maintenance
Also called:
Welding repair services (e.g., automotive, general)
7692Welding Repair
335310Electrical Equipment Manufacturing 335311Power, Distribution, and Specialty Transformer Manufacturing
Also called:
Transformers, separate solid-state arc-welding, manufacturing
Arc-welding transformers, separate solid-state, manufacturing
3612Power, Distribution, and Specialty Transformers
238100Foundation, Structure, & Building Exterior Contractors 238190**Other Foundation, Structure, and Building Exterior Contractors
Also called:
Welding, on site, contractors

1791Structural Steel Erection
1799Special Trade Contractors, N.E.C.
325900Other Chemical Product & Preparation Manufacturing 325998All Other Miscellaneous Chemical Product and Preparation Manufacturing
Also called:
Fluxes (e.g., brazing, galvanizing, soldering, welding) manufacturing
2819Industrial Inorganic Chemicals, N.E.C.
2869Industrial Organic Chemicals, N.E.C.
2899Chemicals and Chemical Preparations, N.E.C.
3952Lead Pencils, Crayons, and Artists' Materials
3999Manufacturing Industries, N.E.C.
NAICS Code 325998 matches more SIC codes. See the detail
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1997 NAICS Information
** In 2002, NAICS codes were updated from the 1997 codes to reflect changes in the structure of U.S. industries. The search term you entered matches a 1997 code, and the industry shown replaces all or part of the 1997 industry. The table below shows the relationship of the 1997 codes to the 2002 codes for industries above that were updated.
1997 NAICS Code Matching
2002 NAICS Codes
Explanation of Parts
235910Structural Steel Erection Contractors238120Structural Steel and Precast Concrete ContractorsExcept Curtain Walls, Metal Furring Installation, and Cooling Tower Installation
238190**Other Foundation, Structure, and Building Exterior Contractors (pt)Curtain Walls and Metal Furring Installation
238220Plumbing, Heating, and Air-Conditioning Contractors (pt)Cooling Tower Installation
    
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