Explosion Proof Overhead Crane 10 Ton S10.5m H7m ExdeIIBT4 Zone 1

ExdeIIBT4 Zone 1 is an international explosion proof classification that defines where and how the crane can be used:

• Ex — Explosion proof equipment
• de — Flameproof enclosure (d) with increased safety (e) protection
• IIB — Gas group IIB (typical for ethylene, propane, and similar gases)
• T4 — Temperature class T4, meaning maximum surface temperature ≤135°C
• Zone 1 — Hazardous area where explosive gas atmosphere is likely to occur during normal operation

For practical purposes, ExdeIIBT4 Zone 1 means this explosion proof overhead crane can be safely used in petrochemical, chemical, and refinery plants where flammable gases may be present during normal operation. This is one of the most demanding explosion proof ratings for overhead cranes.

Explosion proof motors on this explosion proof overhead crane prevent ignition of flammable gases by containing any internal spark or explosion within the motor enclosure:

• Flameproof enclosure (Ex d): The motor housing is designed to withstand an internal explosion and prevent flame from escaping to the surrounding atmosphere
• Increased safety (Ex e): Additional design measures prevent sparking or excessive temperature during normal operation
• Temperature class T4: Maximum surface temperature stays below 135°C, safe for IIB gases
• Explosion proof cable glands: All cable entries use certified explosion proof glands to maintain the enclosure integrity
• Explosion proof control panel: The electrical control panel is also ExdeIIBT4 rated

On this crane, the hoist motor (1.5/9.5kW), trolley motors (2×0.1/0.4kW), and long travel motors (2×0.2/0.8kW) are all explosion proof rated. The pendant control station is also explosion proof, allowing the operator to work safely within Zone 1.

In ExdeIIBT4 Zone 1 hazardous areas, a double girder overhead crane with crab wire rope hoist is the preferred configuration because:

• Higher rigidity: Double girder design resists bending and torsion at 10t capacity, reducing stress on the explosion proof components
• Higher hook lift: The crab wire rope hoist runs on top of the two girders, allowing the hook to be raised closer to the bridge within the 7m lift height
• Better stability: The crab trolley runs on two rails (1400mm gauge), reducing load swing in the hazardous area
• Explosion proof integration: The crab wire rope hoist is designed for easy integration of ExdeIIBT4-rated motors and brakes
• Maintenance access: The crab design allows easier inspection and maintenance of explosion proof components

A single girder overhead crane is not typically used in Zone 1 because the explosion proof motor options are more limited and the duty cycle is less suitable for hazardous area operation.

Seven numbers on this explosion proof overhead crane drawing must match your plant, or the crane will not fit or operate correctly:

If any of these seven differ from your plant, tell Yuantai before ordering — each change affects price, lead time, and explosion proof certification on the explosion proof overhead crane.

P30 rail is specified for this explosion proof overhead crane because:

• Wheel load: 79.6 kN — the 10t capacity and 10.5m span create significant load moment at the end carriages
• Heavier double girder structure: The explosion proof double girder bridge with crab wire rope hoist is heavier than a standard crane, increasing the wheel load
• Long service life: P30 rail is standard for 10t+ double girder overhead cranes in continuous plant use
• Standard availability: P30 is a common rail section, easy to source and replace

Do not substitute a lighter rail (P22 or P24) without recalculating the wheel load and dynamic forces. The 79.6 kN wheel load requires P30 or heavier, especially in a continuous-operation hazardous area plant.

This explosion proof overhead crane is certified for ExdeIIBT4 Zone 1 — the more demanding of the two zones:

• Zone 1: Explosive gas atmosphere is likely to occur during normal operation — this crane is certified for Zone 1
• Zone 2: Explosive gas atmosphere is not likely to occur during normal operation, only briefly — a Zone 1 crane can also be used in Zone 2

In practice, an ExdeIIBT4 Zone 1 crane can be used in both Zone 1 and Zone 2 areas, but a lower-rated crane cannot be used in Zone 1. If your plant has both zones, a single Zone 1 crane can serve both, simplifying your fleet.

To avoid surprises at installation, these items are outside the explosion proof overhead crane supply scope unless you specifically add them:

• Runway rail (P30) and rail fasteners
• Runway beam and building column reinforcement
• Building structural support for the 79.6 kN wheel load
• Site power supply up to the crane isolator
• Explosion proof wiring from the isolator to the crane
• Erection crane and site lifting equipment
• Local electrical connection and hazardous area permits

Because the explosion proof overhead crane runs in a hazardous area, the building structure and power supply interface are critical — the runway beam and columns must support the 79.6 kN wheel load, and the power supply must meet Zone 1 requirements. Yuantai can provide runway load drawings and explosion proof wiring specifications as optional items.

Send these twelve items and Yuantai will issue a free custom explosion proof overhead crane CAD drawing, 3D model, and proposal within 24 hours:

1. Hazardous area classification (Zone 1 / Zone 2 / ATEX)
2. Gas group (IIA / IIB / IIC)
3. Temperature class (T1 / T2 / T3 / T4)
4. Required lifting capacity (t) — e.g., 10t
5. Plant width and runway rail center-to-center distance (span)
6. Required lifting height (m) — e.g., 7m
7. Plant length / crane travel distance
8. Power supply (V / Hz / Ph)
9. Lifts per hour or hours per day (duty)
10. Building column and runway beam capacity
11. Longest load length and weight
12. Control preference: pendant or remote (explosion proof rated)

The more complete the list, the faster and more accurate the explosion proof overhead crane drawing, 3D model, and quote.

This published explosion proof overhead crane drawing and 3D rendering are a free technical reference — you may use them to plan your plant and check fit. A project-specific explosion proof overhead crane GA drawing and 3D model are also free for standard configurations. A design fee may apply only for complex hazardous area conditions, non-standard spans, or specialized explosion proof engineering. The explosion proof overhead crane drawing remains the property of Yuantai Cranes: unauthorized copying, use, or manufacturing without written authorization is strictly prohibited.