5 Explosion-Proof Overhead Cranes: Maximum Safety in Hazardous Workspaces

Explosion-proof overhead cranes are classified into three main categories: one designed for use in coal mine environments with explosive gases, one for environments with explosive gases other than those in coal mines (Class II), and one for environments with explosive dust, excluding coal mines (Class III). The principles behind these three types of explosion-proof cranes are essentially the same, but they are adapted to different environments, with variations in explosion-proof technology. Explosion-proof overhead cranes can also be paired with explosion-proof wire rope hoists.

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2 LXB explosion proof single girder underslung crane

LXB Explosion-Proof Single Girder Underslung Crane: Reliable Lifting for Hazardous Environments

LXB explosion-proof single girder underslung crane is used in the working environment where explosive mixtures exist. The structure of its main load-bearing components and LX-type electric single girder underslung cranes are the same.

3 LHB explosion proof double girder hoist overhead crane

LHB Explosion-proof Double Girder Hoist Overhead Cranes: Durable Solutions for Risky Environments

LHB explosion-proof double girder hoist overhead cranes are used in the working environment where explosive mixtures exist. The structure form of its main load-bearing components is similar to that of LH electric hoist double girder bridge cranes.

4 QB explosion proof open winch double girder overhead crane

QB Explosion-proof Open Winch Double Girder Overhead Cranes: Maximum Safety in Hazardous Industries

QB explosion-proof open winch double girder overhead cranes are used in the working environment where explosive mixtures exist. The structural form of its main load-bearing components is the same as that of ordinary double girder bridge cranes.

5 QBE explosion proof double trolley double girder overhead crane

QBE Explosion-Proof Double Trolley Double Girder Overhead Cranes: Precision Lifting for Heavy-Duty Applications

Explosion-proof double trolley double girder overhead crane in the picture is a larger explosion-proof crane equipment in China, used in the aerospace industry.

1 LB explosion proof single girder overhead cranes

LB Explosion-proof Single Girder Overhead Cranes: Tailored for Hazardous Environments

LB electric explosion-proof single girder overhead crane is used in the working environment where explosive mixtures exist. The structure of its main load-bearing components and LD electric single girder overhead cranes are the same.

All kinds of explosion-proof overhead cranes produced by our company are designed, manufactured and accepted in strict accordance with the following national standards:

GB/T 3811-2008 《Design rules for cranes》
GB/T 6067-2010 《Safety rules for lifting appliances》
GB/T 3836.1-2021 《Explosive atmospheres-Part 1: Equipment-General requirements》；
GB/T 3836.2-2021 《Explosive atmospheres-Part 2: Equipment protection by flameproof enclosures “d”》；
JB/T 10219-2011 《Explosion-proof cranes with electric hoist》
JB/T 5897-2014 《Explosion-proof overhead traveling cranes》

Various types of explosion-proof bridge cranes are examined and tested by the National Center for Supervision and Inspection of Explosion-Proof Electrical Product Quality, and the explosion-proof cranes are issued with certificates of conformity after the final test.

Explosion-proof environment

Explosion-proof cranes are suitable for use in explosive gas environments Zone 1 and Zone 2 or combustible dust environments Zone 21 and Zone 22.

Temperature Group		Maximum permissible surface temperature ℃
T_A or T_B	T₁	450
	T₂	300
	T₃	200
	T₄	135
	T₅	100
	T₆	85

Class II explosion-proof crane explosion-proof level and the corresponding temperature group applicable explosive gases are listed below:

Explosion-proof grade	Temperature Group
Explosion-proof grade	T₁	T₂	T₃	T₄	T₅	T₆
IIA	Ethane, propane, styrene, benzene, xylene, carbon monoxide, acetone, acetic acid, methyl acetate, ammonia, pyridine	Ethanol, butane, propylene, ethyl acetate, methylene chloride, vinyl chloride, chloroethanol, thiophene, cyclopentane, dimethylamine	Pentane, hexane, ethylcyclopentane, turpentine, naphtha, petroleum (including military gasoline), fuel oil, chlorobutane, tetrahydrothiophene	Acetaldehyde, trimethylamine		Ethyl nitrite
IIB	Propyne, acrylonitrile, hydrogen cyanide, coke oven gas	Ethylene, ethylene oxide, methyl acrylate, furans	Dimethyl ether, acrolein, tetrahydrofuran, hydrogen sulfide	Dibutyl ether, diethyl ether, ethyl methyl ether, tetrafluoroethylene
IIC	Hydrogen, water gas	Ethyne C2H2		Carbon disulfide	Ethyl nitrate

Dust class explosion-proof cranes each anti-dust structure form and the corresponding temperature groups of combustible dust to adapt to the following table:

Dust explosion-proof form	Temperature Group
Dust explosion-proof form	T_A、T₁ or T_B、T₁	T_A、T₂ or T_B、T₂
A or B	Magnesium, red phosphorus, calcium carbide, soap powder, green fuel, phenol dyes, polyethylene, polypropylene, polyurethane, polyvinyl chloride, hard rubber, natural resins, rosin, wheat flour, corn starch, granulated sugar powder, cotton fiber, synthetic staple fiber, anthracite powder, charcoal powder, coal coke powder	Sifted Rice Flour, Cocoa Flour, Malt Flour, Flax Meal Flour, Coconut Flour, Peat Flour, Lignite Flour, Bituminous Coal Flour, Coal Flour for Coke, Lignite Coke Flour