Explosion-proof Hose
NORRES highlights their use in "ATEX zones" for ventilation and dust extraction.
CZ Electric specifies their role in "hazardous areas" like oil refineries.
Material
|
Material |
Properties |
Common Applications |
|
Stainless Steel |
Strong, corrosion-resistant, flameproof |
Cable protection, fluid transfer |
|
Polyurethane (PU) |
Flexible, antistatic, abrasion-resistant |
Dust extraction, ventilation |
|
Rubber (Reinforced) |
Flexible, oil-resistant, cost-effective |
Cable sleeving, small-diameter use |
|
PVC-Coated Polyester |
Lightweight, conductive, durable |
Ventilation, material transfer |
Size of Explosion-proof hose
|
Size (ID) |
Approx. OD (in.) |
Common Use |
|
3/8" (10 mm) |
~0.5"-0.75" |
Small instrumentation, cables |
|
1/2" (13 mm) |
~0.75"-1" |
Lightweight cable protection |
|
3/4" (19 mm) |
~1"-1.25" |
Compact ventilation, sleeving |
|
1" (25 mm) |
~1.25"-1.5" |
Moderate fluid transfer, cables |
|
1-1/4" (32 mm) |
~1.5"-2" |
General hazardous area use |
|
1-1/2" (38 mm) |
~2"-2.5" |
Higher flow, larger cables |
|
2" (50 mm) |
~2.5"-3" |
Heavy-duty ventilation, transfer |
Usage of Explosion-proof hose
- Ayvaz describes explosion-proof hoses as "used in explosive environments".
- NORRES highlights their use in "ATEX zones" for ventilation and dust extraction.
- CZ Electric specifies their role in "hazardous areas" like oil refineries.
Specific Functionality
- Cable Protection: Shields electrical wiring from physical damage, environmental exposure, and potential sparking in explosive zones.
- Fluid/Gas Transfer: Safely conveys flammable or hazardous liquids or gases between equipment, preventing leaks or ignition.
- Ventilation/Dust Extraction: Removes explosive dusts or vapors from confined spaces.
- Explosion Containment: Contains internal sparks or pressure bursts.
- Flexibility: Adapts to tight spaces or moving machinery.
- Oil and Gas:
Used to protect cables in drilling rigs, refineries, or gas stations, or transfer fuel/oil in explosive zones.
- Chemical Processing:
Employed for fluid transfer or ventilation in plants with flammable vapors.
- Mining:
Protects wiring or ventilates dust-laden air in underground coal or metal mines prone to methane or dust explosions.
- Manufacturing:
Used in facilities handling explosive powders.
- Specific Uses:
Instrumentation Connections: Links sensors or controls in hazardous areas.
Pneumatic Systems: Transfers compressed air or gases safely.
Temporary Installations: Provides flexible solutions during maintenance in explosive environments.
Structure
1. Inner Core:
- Material: Corrugated stainless steel, polyurethane, or rubber.
- Design: A flexible, tubular core with a smooth or corrugated interior.
2. Reinforcement Layer:
Material: Stainless steel wire, spring steel helix, or high-strength fabric.
3. Design:
- Braiding: Stainless steel wires woven over the core.
- Spiral: Steel wire helix embedded or wrapped around the core.
4. Outer Sleeve (Optional):
- Material: PVC, silicone, rubber, or abrasion-resistant PU coating.
- Design: A smooth, continuous layer extruded or molded over the reinforcement, often glossy or textured.
5. Antistatic Lining/Coating (Optional):
- Material: Conductive polyurethane, carbon-impregnated fabric, or thin metallic lining.
- Design: Integrated into the inner core or as a coating/lining.
6. End Fittings (Optional):
- Material: Stainless steel, brass, or aluminum.
- Design: Threaded, flanged, or crimped ends attached to the hose, sealed with gaskets or O-rings in some cases.
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