Conditions that need special consideration
- Highly corrosive atmospheres
- Extreme temperatures, high or low
- High humidity, especially near salt water
- Rain, or direct exposure to salt or fresh water spray
- High levels of airborne dirt, dust or sand
- Elevations that negatively affect the power source
- Hazardous locations — areas where fire or explosion hazards may exist from flammable gases or vapors, flammable liquids, combustible dust, or ignitable fibers or flyings
Hazardous (classified) locations
Hazardous locations are classified by the type of hazard (Class), how likely it is to be present (Division) and the specific material (Group).
| Class | Division 1 | Division 2 | Groups |
|---|---|---|---|
| I — Gases, vapors and liquids | Normally explosive and hazardous | Not normally present in an explosive concentration (but may accidentally exist) | A: Acetylene B: Hydrogen, etc. C: Ether, etc. D: Hydrocarbons, fuels, solvents, etc. |
| II — Dusts | Ignitable quantities of dust normally are or may be in suspension, or conductive dust may be present | Dust not normally suspended in an ignitable concentration (but may accidentally exist). Dust layers are present. | E: Metal dusts (conductive* and explosive) F: Carbon dusts (some are conductive*, all are explosive) G: Flour, starch, grain, combustible plastic or chemical dust (explosive) |
| III — Fibers and flyings | Handled or used in manufacturing | Stored or handled in storage (exclusive of manufacturing) | Textiles, wood-working, etc. (easily ignitable, but not likely to be explosive) |
* Conductive dust.
Built for classified areas
We build explosion-proof electric and pneumatic winches and hoists for classified areas. See Hazardous-Location (HAZLOC) Winches & Hoists and the Explosion-Proof Options Sheet (Doc 68C, PDF).