Material Of Explosion-proof Distribution Box

Typically, the casing material of explosion-proof distribution boxes needs to possess high strength, corrosion resistance, impact resistance, and good explosion-proof performance. The choice of material for explosion-proof distribution boxes mainly depends on their operating environment. Common materials include the following

 

1. Cast Aluminum/Aluminum Alloy

The most common material for explosion-proof distribution boxes on the market.

Advantages: Lightweight, good thermal conductivity, easy to process, and moderate cost.

Process: High-temperature die casting. The surface is usually treated with electrostatic spraying to enhance corrosion resistance.

Applicable Environments: Most chemical plants, oil fields, drilling platforms, and other general explosive gas environments.

Note: Limited corrosion resistance; not suitable for high salt spray or strong acid/alkali environments.

 

2. Cast Iron

A traditional explosion-proof casing material, relatively heavy.

Advantages: Very high mechanical strength, impact resistance, and strong compressive strength.

Disadvantages: Very heavy, inconvenient for installation and maintenance, and relatively poor corrosion resistance, prone to rust.

Suitable environments: Underground coal mine gas environments, heavy industrial workshops, and other locations with high requirements for mechanical impact.

 

3. Stainless Steel
Typically, 304 or 316L stainless steel is used.

Advantages: Extremely strong corrosion resistance, aesthetically pleasing, rust-proof, and high mechanical strength.

Disadvantages: Higher cost, more difficult processing (high requirements for welding and explosion-proof surface treatment).

Suitable environments: Offshore platforms, ships, food and pharmaceutical workshops, environments with strong acid and alkali corrosion, and locations with high cleanliness requirements.

 

4. Carbon Steel
Welded steel plates, typically used in early or specific heavy industrial applications.

Advantages: Very high mechanical strength, strong load-bearing capacity, relatively low cost.

Process: Welded from high-quality carbon structural steel, then sprayed after rust prevention treatment.

Disadvantages: Very heavy, poor corrosion resistance.

Suitable Environments: Underground coal mines (non-stainless steel requirements), large heavy industrial plants, equipment with high vibration.

 

5. Engineering Plastics / Glass Fiber Reinforced Unsaturated Polyester Resin
Typically refers to molding plastics or fiberglass.

Advantages: Antistatic, extremely strong corrosion resistance, good insulation, lightweight.

Disadvantages: Lower mechanical strength than metals, poor heat dissipation.

Suitable Environments: Highly corrosive chemical environments, outdoor open-air locations, applications requiring high insulation performance.

 

Furthermore, exposed fasteners in explosion-proof distribution boxes are usually made of 304 stainless steel to prevent rust. In some special designs, even higher-grade alloy materials such as nickel-based alloys are used.