Industry Classification of Flanges & Pipe Fittings

1. Manufacturing Side (Producer Industry)

Flanges and industrial pipe fittings belong to Metal Pipe Fittings / Fabricated Metal Products (piping components).

US Standard Classification

NAICS Code: 332919 — Other Metal Valve and Pipe Fitting Manufacturing

SIC Code: 3494 — Valves and Pipe Fittings, NEC

These codes cover forged steel flanges, elbows, tees, reducers, stub ends and other pressure piping fittings manufactured from forgings or steel blanks (not fabricated directly from cut pipe).

Distinction:

If companies bend/cut finished steel pipes into fittings → SIC 3498 (Fabricated Pipe).

If companies forge blanks and machine flanges/fittings → 332919 / 3494.

General Industry Name (for quotation & introduction)

Industrial piping components industry / Steel pipe fittings & flange manufacturing

Commonly described as: Pipeline Accessories Industry

2. Downstream End-User Industries (Where flanges are applied)

Flanges are consumable critical components for fluid piping systems, widely used in:

✅ Oil & Gas (onshore pipelines, refineries, LNG, offshore platforms)

✅ Petrochemical & Chemical processing plants

✅ Power Generation (thermal power, nuclear power, biomass power)

✅ Water treatment & desalination

✅ Marine & Shipbuilding / Offshore engineering

✅ HVAC, municipal water & gas supply

✅ Pharmaceutical, food & beverage (sanitary piping)

✅ Metallurgy, new energy (hydrogen pipeline, battery factories)