Explosion-proof Grades of Explosion-proof Overhead Cranes

As we all know, explosion-proof overhead crane is a kind of material lifting equipment specially customized for high temperature and serious explosive environment. Explosion-proof grades show the explosion-proof capability of overhead crane. And the bridge cranes with different explosion-proof grades is suitable for different working conditions. Today, let's know more about explosion-proof grades so that you can make right choice when you are selecting overhead crane.

The importance of knowing about explosion-proof grades

The explosion-proof principle of explosion-proof cranes is to take corresponding measures to control the detonation source. Various flammable environments and explosive environments have different requirements for the explosion-proof grade of cranes. As we all know, the explosion-proof cranes are usually installed and used in flammable and explosive environments. Unqualified crane manufacture, improper crane selection and inappropriate crane operation can lead to serious consequences for persons or property. Therefore, explosion-proof products can only be manufactured by professional units with corresponding manufacturing license qualifications.

Specific classification of explosion-proof grade

Explosion-proof cranes are classified according to the environment in which they are used and the high surface temperature allowed by the electrical enclosure.

Explosion-proof grades for explosive gas environments

The electrical equipment of explosion-proof cranes for explosive gas environments is divided into Class I and Class II according to relevant regulations. The corresponding explosion-proof cranes are classified as:

1. Class I: explosion-proof cranes for coal mines
2. Class II: Explosion-proof cranes for other explosive gas environments except coal mines.

Explosion-proof grades for combustible dust environments

The electrical equipment of explosion-proof cranes used in combustible dust environments is divided into A type and B type according to relevant regulations, which are represented by DIPA and DIPB respectively. According to the temperature grouping, they can be divided into the following groups:

1. High surface temperature of electrical equipment of Class I explosion-proof cranes. When coal dust may accumulate on the surface of electrical equipment, it cannot exceed 150℃. When the surface of electrical equipment will not accumulate or measures (such as sealing dust or ventilation) can prevent coal dust from the regulations, it should not be more than 450℃
2. The high surface temperature of electrical equipment of Class II and dust explosion-proof cranes is grouped as follows: T1-T6 are: 450℃, 300℃, 200℃, 135℃, 100℃, 85℃

If you are looking for a suitable explosion-proof overhead crane, you must select the right one which can meet all the requirements for use to avoid potential safety hazards. If you have any confusion about Yuantai explosion-proof overhead crane, leave us a message on our website or e-mail us, we'll reply you as soon as possible.