Explosion-proof box

Explosion-proof boxes are very strong connection boxes for use in dangerous and explosive places. Explosion-proof boxes are made of various electrical components such as terminal blocks, switches, relays, transformers and other arcing and sparking devices. Explosion-proof boxes are resistant to corrosion and have high tolerance in extreme temperatures.

The anti-explosion box is designed and produced in such a way that it prevents the occurrence of electric shock, sparks and explosions and disruption of connections and internal items such as electrical components, electronic boards, etc., and has doubled the above safety. Explosion-proof boxes are produced in various sizes with stainless steel, aluminum and GRP materials.

The use of explosion-proof boxes

Explosion-proof boxes in dangerous areas are divided into different degrees of protection according to the location and the level of protection they provide. These ratings are based on the National Electrical Manufacturers Association (NEMA) standards as well as the international standard EN 60529.

Explosion-proof boxes are used in high-risk areas and places prone to explosions.

Places like:

• Oil and gas tanks
• Petrochemicals
• mines
• gas station
• CNG gas platforms
• And ….

Introduction of explosion-proof boxes

Steel explosion-proof box

As it is known, this type of box is steel and its components include body, hinge, washer, bolt and nut, earring, assembly plate, ground connection and lock. Due to the use of 316 steel, which has nickel and molybdenum, it has high flexibility and is rustproof.

Steel explosion-proof boxes are available in different sizes.

Technical specifications of steel explosion-proof boxes:

• Has IP: 67
• Made of 304 and 316 stainless steel
• Having Ex e protection
• With stainless bolts and EPDM washers

Aluminum explosion-proof box

Aluminum explosion-proof boxes have equipment such as gasket around the door, door hinge and handle, explosion-proof signal light, explosion-proof step and starter, ammeter on the door, etc. and are produced in different sizes and shapes. Aluminum explosion-proof boxes are suitable for explosion-proof panels and switchboards due to their Ex d protection type.

Technical specifications of aluminum boxes:

• It has IP 67, 68.
• The body is made of aluminum.
• They are made of stainless bolts and silicone washers.
• They have an IECEx certificate.
• They have EN 600-79-0 / EN 60079-1 / EN 60079-7 / EN 600 79-11 / 60079-31 standards.

GRP explosion-proof box

GRP explosion proof boxes are made of fiber optic and reinforced polyester. These explosion-proof boxes are used in the oil, gas and petrochemical industries due to their very low weight, high resistance to electric shock and high resistance to physical shocks.

Technical specifications of GRP explosion-proof boxes:

• IP 66, 67
• It has Ex e protection
• The material of the hc body is reinforced polyester fiber and glass.
• Made of stainless screws and silicone washers.

Explosion-proof terminal box

Electrical terminal boxes are designed and produced to protect electrical connection points. The explosion-proof terminal box is an electrical structure that is used to place special connections and, unlike junction boxes, cannot be expanded. It means that They have no space for more connections.

The input and output of these terminals, which are placed around it, have the ability to connect with explosion-proof glands. This feature is due to the complete isolation of the terminal, as well as maintaining the cable and securing them in the explosion-proof system. The body of this equipment is usually made of cast iron and is well sealed.

The features of terminal boxes are:

• The body of the terminals is usually made of cast iron and strong plastics.
• In terms of size, they are much bigger than junction boxes.
• They are a good option for larger and more complex connections.
• The explosion-proof terminal box is used in large industrial complexes and places that
• require safe connections to high voltage.
• It has different sizes and different switches and can be installed inside and outside the box.
• They are explosion-proof.
• Explosion-proof terminals are used in zones 1 and 2 due to their good sealing.
• The input and output of these terminals, which are placed around it, can be connected with
• explosion-proof glands.

Explosion-proof junction boxes

Junction boxes are electrical devices that are used to distribute and divide electricity to normal wiring in high-risk environments and are considered one of the most widely used explosion-proof boxes. Explosion-proof junction boxes prevent the erosion and damage of cables and other devices and are produced and supplied in three aluminum, steel and GRP bodies.

Junction boxes are expandable and always have space for more connections if needed. It is worth noting that this example of explosion-proof boxes are much smaller compared to terminal boxes and can be used for domestic and commercial purposes.

Types of explosion-proof boxes in terms of type of protection

Explosion-proof boxes are generally divided into two categories, EX d boxes and EX e boxes, based on the type of protection.

Explosion-proof box Ex d

EX d boxes have a very high degree of protection (IP) and non-explosion-proof equipment can be placed inside. Ex d boxes are generally made of aluminum. In addition to the terminal, it is also possible to place ignition devices such as contactors, fuses, electronic boards, etc. This model of explosion-proof boxes is designed and produced in two gas protection modes IIB and IIC.

Explosion-proof boxes EX e

Explosion-proof boxes with protection level EX e are mostly used as terminal boxes. Because they do not have high protection, and for this reason, spark-generating devices cannot be used in these boxes. EX e boxes are made of aluminum, steel or GRP (plastic).

Types of explosion-proof boxes according to the type of gas protection

• Explosion-proof boxes with gas protection grade IIB
• Explosion-proof boxes with IIC gas protection degree
• Explosion-proof boxes with gas protection degree IIB+H2

Famous brands of explosion-proof boxes

•  Cortem
• Warom
• Stahl
• Appleton
• SCAME
• (CEAG)
• and...

Explosion-proof box zoning

Before buying an explosion-proof box or any type of explosion-proof equipment, you should pay attention to the technical specifications and existing standards so that the equipment is selected according to the needs and the environment used.

According to the IEC 60079 standard, dangerous places that are susceptible to the presence of gases and dust are divided into several categories. The zoning and usable environment of explosion-proof boxes can be seen in the catalog or on their body.

Degree of protection and standard of explosion-proof boxes

Paying attention to the standards and the valid certificate is one of the important issues that must be paid attention to when buying explosion-proof boxes and equipment. The most important standards of explosion-proof equipment are:

• ATEX standard
• NEC standard
• IEC standard
• EN standard

The price of the explosion-proof box

The price of explosion-proof boxes can vary based on the variety of production, available brands, and the materials used. But in general, the price of these boxes is economical.

You can contact our consultants for advice on buying an explosion-proof box.

In order to buy all kinds of anti-explosion equipment as well as precision instruments, you can contact our consultants on the Parsa the ex proof website.

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