Explosion-proof overhead cranes manufactured in Quebec

What is an explosion-proof overhead crane?

An explosion-proof overhead crane is a lifting device designed to operate safely in an explosive atmosphere, where flammable gases, vapors, or dust can ignite.

Each of its components (motor, controls, brakes, power supply, hoist, and trolleys) is selected and certified to eliminate any source of ignition: sparks, electric arcs, or hot surfaces. In Canada, explosion-proof overhead cranes must comply with the Canadian Electrical Code (CSA C22.1) and carry CSA certification attesting to their suitability for the targeted hazardous location.

When is an explosion-proof overhead crane required?

Whenever a lifting device must be installed in a hazardous location—that is, a place where an explosive atmosphere may form. Such locations are found in many industries: petrochemicals, chemicals, pharmaceuticals, paints and coatings, grain and flour processing, munitions, pulp and paper, and battery manufacturing. The paint booth is the most common example.

The type of equipment required then depends on the classification of the location. In Canada, this is based on the class and division system (Classes I, II, and III; Divisions 1 and 2) or on the zone system, harmonized with the international IEC standard (Zones 0, 1, and 2 for gases; zones 20, 21, and 22 for dust). It is determined by the nature of the hazard—gas or dust—and by the frequency with which the explosive atmosphere is present.

What makes an overhead crane explosion-proof?

A combination of complementary measures: explosion-proof electrical components (sealed enclosures and motors), non-sparking materials for parts subject to friction (brass for the wheels, bronze for the hook), and equipotential bonding that eliminates the buildup of static electricity, and therefore the risk of electrostatic discharge. Each component is certified for the gas group (IIA, IIB, or IIC) and carries a temperature class (T1 to T6). This class corresponds to the maximum surface temperature it can reach, which must remain below the auto-ignition temperature of the gas present.

As a designer-manufacturer, we design each overhead crane according to the exact classification provided by the expert who classified your location. We then validate the entire assembly through an inspection performed by a third party, in accordance with CSA SPE-1000, as required by CSA B167 and the Canadian Electrical Code.

How are hazardous areas classified in Canada?

Hazardous locations are classified according to the type of danger involved: Class I locations (Zone 0,1,2) involve flammable gases or vapors in sufficient quantities to form explosive atmospheres, while Class II locations (Zone 20,21,22) are characterized by the presence of combustible or electrically conductive dusts. The classification by an expert specifies the location of the equipment in the room, the type of substance and the environment, as well as the maximum surface temperature of the equipment, in order to prevent any risk of self-ignition.
Canada/US: Class I,II division 1,2
Canada/other countries: Zone 0,1,2 or 20,21,22

View the full classification table

Should we classify according to the division system or the zone system?

In principle, zone and division methods of site distribution offer equivalent levels of safety. However, the Canadian Electrical Code (CE) gives preference to zoning. As indicated in Section 18, new installations in Class I hazardous locations will henceforth be classified according to the zoning system.

For existing installations, the decision to reclassify them under the zoning system is left to the owner. Lifting equipment approved for Class 1 or Class 1, Division 1 is accepted in Zones 1 and 2, while Class 1, Division 2 lifting equipment is only accepted in Zone 2. Refer to articles 18-100 and 18-150 and the table in Appendix J, section J1.2.

Who can determine classification?

The classification of hazardous locations must be carried out by a qualified professional, such as an engineer or a chemist, since it relies on specialized standards and regulations. This analysis is based in particular on the Canadian Electrical Code (CEC), the Quebec Construction Code – Chapter V Electricity, the RSST for risk‑prevention requirements, and the IEC 60079‑10‑1 standard for the methodology used to classify hazardous zones. A well‑documented assessment then enables the crane manufacturer to design equipment that is compliant and properly classified.

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Is certification mandatory for equipment and components that are not electrical?

In some cases, equipment or components may appear safe because they are not electrified. Take, for example, an air-powered hoist. At first glance, this equipment presents no spark hazard. However, the friction of certain materials or impacts could generate sparks. In Canada, there are no recognized national standards, or certification programs, for evaluating non-electrical equipment used in flammable environments, although some industries or jurisdictions may impose their own requirements. That said, the expert involved in the case may recommend specific spark-resistant non-electrical components, such as brass wheels, a bronze-coated hook or a stainless steel electrification system.

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How much does an explosion-proof overhead crane cost?

The cost of an explosion-proof overhead crane is typically 3 to 4 times higher than that of a standard crane. This difference is due to the use of specialized components designed to withstand explosion risks, and the need to comply with strict manufacturing standards. Each system requires precise wiring, in-shop testing, and a mandatory CSA SPE-1000 inspection in Canada after electrical assembly.

Prices for standard overhead cranes

Where to Start?

Choosing an explosion-proof overhead crane can feel overwhelming, especially when strict safety and hazardous zone standards must be met. Here are the recommended steps to launch your project in a structured and efficient way:

1. Consult a process specialist
Before selecting your equipment, it's essential to determine the classification of your hazardous area (class, division, group, auto-ignition temperature). This step directly influences the type of explosion-proof crane required.
2. Assess your lifting requirements
Make sure to gather the following operational data:

Number of lifts per hour
Required lifting height
Maximum load weight
Lifting and travel speeds (if specific speeds are required)
Ambient temperature or other environmental conditions

3. Communicate with the crane manufacturer
Before reaching out to a manufacturer, prepare the following details:

Your environment’s classification (class, division, group, temperature)
Your operational cycles (frequency and intensity)
Any integration constraints: available clearance, physical space, and safety requirements

You now have a clear overview of the key elements needed to plan a safe and compliant explosion-proof crane project.

Our team can help validate your needs, ensure your project meets applicable standards, and recommend the equipment best suited to your environment.

Click “Contact a Specialist” to get started.

Their ability to listen to our specific needs has been a major strength. They have always responded quickly and efficiently, especially in emergency situations, which has greatly contributed to the continuity and success of our operations. I highly recommend Groupe Industriel Premium to any company looking for a reliable, structured, and responsive partner. Their professionalism and commitment to quality and safety make them a model in the industry.

Jean-Denis Perron

Groupe Picard

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Overhead cranes

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Explosion-proof Overhead cranes

What is an explosion-proof overhead crane?

When is an explosion-proof overhead crane required?

What makes an overhead crane explosion-proof?

How are hazardous areas classified in Canada?

Should we classify according to the division system or the zone system?

Who can determine classification?

Is certification mandatory for equipment and components that are not electrical?

Explosion proof component non-electrical

End carriage brass wheels

Trolley brass wheels

Bronze-coated hook

Equipotential connection

Stainless steel electrification system

How much does an explosion-proof overhead crane cost?

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