Exd IIB T4 Certified 5 Ton Explosion Proof Hoist for Iran Refinery

Safety First

Operating in explosive atmospheres means different needs for lifting equipment, DQCRANES supplies types of explosion proof electric hoists from standard products to customized types for your specific lifting requirements. All EX electric hoist components are selected to improve the high level of safety required for the hazardous atmospheres in chemical and petrochemical plants, oil refineries, gas power plants, wastewater treatment plants, paint shops, and other industrial sites.

Client Background

A refinery in Iran requires a robust, explosion-proof electric chain hoist for safe material handling in Zone 1 hazardous areas (flammable gases, vapors). The hoist will be used to lift and transport equipment, valves, and piping systems in a high-temperature, corrosive environment typical of oil and gas refineries.

Technical Specifications

1. Capacity: 5 tons (5,000 kg)
2. Lifting Height: 7 meters
3. Lifting Speed: 2.7 m/min (variable frequency drive optional)
4. Trolley Travel Speed: 11 m/min (electric trolley with explosion-proof motor)
5. Power Supply: 400V, 3-phase, 50Hz (compliant with Iranian grid standards)
6. Explosion-Proof Certification: Ex d IIB T4 (Schneider Electric motor and controls), suitable for Zone 1/21 hazardous areas with gas groups IIB and temperature class T4.

Design Features

• Chain: Nickel-plated Grade 100 alloy chain (high tensile strength, corrosion-resistant), for refinery environments.
• Hook & Trolley Wheels: Stainless steel (Grade 304/316), swivel design with safety latch.
• Motor: Schneider Electric explosion-proof motor (thermal protection, IP65 rated).
• Trolley: Motorized travel system with explosion-proof gearmotor.
• Wheels: Stainless steel wheels for smooth operation on I-beam tracks.
• Control System: Pendant control with IP65 rating, emergency stop, and overload protection.

Safety Features

• Dual braking system (mechanical + electromagnetic).
• Upper/lower limit switches.
• Overload protection relay.
• Emergency stop button.

Benefits

• Schneider Electric Components: Reliable motor and controls reduce downtime.
• Stainless Steel Hardware: Resists rust in coastal or high-humidity regions (e.g., Persian Gulf).
• Flameproof Enclosure: Prevents internal sparks from igniting external gases.
• Low Maintenance: Nickel-plated chain requires minimal lubrication.

Applications in Refineries

• Maintenance Operations: Lifting pumps, valves, heat exchangers, and reactor components.
• Pipeline Installation: Handling heavy pipes and fittings in hazardous zones.
• Emergency Repairs: Safe material handling during shutdowns or leak containment.
• Tank Cleaning/Inspection: Hoisting platforms or equipment into confined spaces.

Production & Delivery

• Lead Time: 12–14 weeks (includes Ex certification and testing).
• Shipping: FOB/CIF to Bandar Abbas Port (Iran).
• Payment Terms: 70% advance, 30% before shipment.

After-Sales Support

• 12-month warranty (includes parts and labor).
• Local technical support in Iran via partnered service providers.
• Spare parts availability (chains, hooks, trolley wheels).

FAQs

Q: Can explosion-proof hoists operate in dusty refinery environments?
A: Yes, models certified Ex tD A21 are designed for combustible dust (Zone 21).

Q: Are stainless steel components mandatory for refinery hoists?
A: Highly recommended for corrosion resistance, especially in coastal or high-H2S areas.

Q: How often should explosion-proof hoists be inspected?
A: Monthly visual checks and annual certified inspections per ISO standards.

Types of Explosion-Proof Hoists For Sale

Explosion-Proof Electric Chain Hoists



Design:

• Uses a nickel-plated or stainless steel load chain for corrosion resistance.
• Compact, lightweight, and ideal for confined spaces.
• Certification: Ex d IIB T4 (gas environments) or Ex tD A21 (dust).

Typical Specs:

• Capacity: 0.5–20 tons.
• Lifting Speed: 2–10 m/min (dual-speed options available).
• Power: 380V/50Hz or 480V/60Hz.

Applications:

• Maintenance in Zone 1/21 areas.
• Lifting valves, pumps, and machinery in refineries.

Explosion-Proof Electric wire rope hoists



Design:

• Uses galvanized or stainless steel wire rope for heavy-duty lifting.
• Higher lifting heights (up to 30m+) compared to chain hoists.
• Certification: Ex d IIC T4 (for hydrogen/acetylene) or IIB T4.

Typical Specs:

• Capacity: 1–50 tons.
• Lifting Speed: 3–12 m/min.
• IP65 rating for dust/water resistance.

Applications:

• Heavy equipment handling in offshore platforms.
• overhead cranes in petrochemical plants.

Manual Explosion-Proof Hoists



Design:

• Operated by hand chain (no electricity or air).
• Simple, low-maintenance design.
• Certification: Ex nA (non-sparking) or Ex d IIB.

Typical Specs:

• Capacity: 0.5–10 tons.
• Lifting Height: Up to 12m.

Applications:

• Low-frequency lifts in hazardous zones.
• Backup for power outages.

Explosion-Proof monorail hoists



Design:

• Fixed or modular monorail systems with integrated hoists.
• Customizable tracks for complex layouts.
• Certification: Ex d IIB T4 (full system certification).

Applications:

• Assembly lines in explosive atmospheres.
• Maintenance bays in refineries.

Want to know more about explosion proof hoists? Contact us for a customized quote or technical consultation!