SIC 3491 — Industrial Valves
SIC 3491 is 'Industrial Valves', a 4-digit Standard Industrial Classification (SIC) code under Major Group 34: Fabricated Metal Products, Except Machinery and Transportation Equipment (Division D: Manufacturing); it maps to modern 2022 NAICS code(s): 332911 (Industrial Valve Manufacturing).
Description & Classification
SIC code 3491 representing 'Industrial Valves' is an industry category in the Standard Industrial Classification (SIC) system under U.S. OSHA and Federal procurement registers.
Modern NAICS Crosswalk
Trace the modern equivalent classifications in the 2022 North American Industry Classification System (NAICS) database:
- NAICS 332911 - Industrial Valve Manufacturing (via SIC1987:3491→NAICS1997:332911→2002:332911→2007:332911→2012:332911→2017:332911→2022:332911)
Classification Details
| SIC Code | 3491 |
|---|---|
| Industry Title | Industrial Valves |
| Division | Division D: Manufacturing |
| Major Group | Major Group 34: Fabricated Metal Products, Except Machinery and Transportation Equipment |
| Source / Verified | US Census 1987 SIC Concordance / 2026-06-28 |
Related Resources & Compliance Guides
Further regulatory reference links for legacy SIC code 3491:
- SIC Codes Complete Compliance Guide — Detailed history and active legal applications of the SIC classification framework.
- Why Legacy SIC Codes Persist Guide — How credit systems and the SEC still rely on SIC metadata.
- SIC ↔ NAICS Crosswalk Tool — Trace industrial code conversions dynamically.
- SIC Major Group 34 Hub — View other legacy industries in this business division.
Related Industries in Major Group 34
Frequently Asked Questions (FAQ)
What industry does SIC code 3491 represent?
SIC 3491 is 'Industrial Valves', a 4-digit Standard Industrial Classification (SIC) code under Major Group 34: Fabricated Metal Products, Except Machinery and Transportation Equipment (Division D: Manufacturing); it maps to modern 2022 NAICS code(s): 332911 (Industrial Valve Manufacturing).
What is the modern 2022 NAICS mapping for SIC 3491?
SIC code 3491 maps to modern NAICS codes: 332911 - Industrial Valve Manufacturing.