About Explosion-Proof Electrical Cabinetry Equipment Fasteners Industry Solutions

About Explosion-Proof Electrical Cabinetry Equipment Fasteners Industry Solutions

Fasteners are usually essential to maintaining the integrity of explosion-proof products. Explosion-proof electrical equipment uses an explosion-proof shell to achieve explosion-proof performance. If the fasteners are in addition to the problem, then the explosion-proof shell and the joint surface do not match, prone to gaps or other issues; fasteners in explosion-proof products play an essential role. For high-quality hexagonal head screws fasteners and professional technical support, don't hesitate to contact us at adelajonly@gmail.com or visit our website at [Juxin Fasteners]: https://www.juxinfasteners.com.

General requirements for explosion-proof fasteners

1. To ensure that the particular explosion-proof type or used to prevent contact with exposed electrically charged parts of the fasteners must be allowed to use tools (such as screwdrivers, wrenches, etc.) to loosen or remove.

2. If the fastener material is suitable for the shell material, a light metal shell with fasteners can be made of light metal or non-metallic materials.

Three 、Only if the thread shape is suitable for the housing material is allowed to tap screw holes on the housing for installing the cover, which may be opened in work.

Requirements for special fasteners

One 、The pitch and tolerance of threads, bolt (nail) head, or nut should meet the requirements of relevant standards;

2, memorable fastener holes allow engagement of the thread depth, which should be at least equal to the outer diameter of the fastener thread;

3, bolts without washers screwed into the shell wall blind holes, the bottom of the hole to retain at least one button thread margin;

4. Outside assembly:

(1) Hexagonal: Hexagonal set screws used to fasten threaded caps should not protrude from the screw holes after fastening;

(2) Class I equipment: The head has a guard ring countersunk holes through the internal protection of the equipment;

(3) Class II equipment: Fastener holes allow thread engagement at a thread depth that is at least equal to the fastener thread OD;

5. Other requirements:

(1) Doors or covers secured by threads shall additionally be secured with the aid of hexagon socket set screws or equivalent;

(2) Double-head screws shall be securely fastened and permanently fastened to the enclosure by fusion welding or riveting, or other equivalent means;

(3) Fasteners shall not penetrate the walls of the explosion-isolating enclosure unless the walls of the enclosure constitute an explosion-isolating bonding surface and the enclosure is not detachable;

(4) When bolts without washers are fully screwed into blind holes in the wall of the explosion-isolating enclosure, the bottom of the holes shall maintain at least an entire thread margin;

(5) Screw holes or double-headed bolts that do not penetrate the wall of the explosion-proof enclosure, the remaining thickness of the wall of the explosion-proof enclosure is at least 1/3 of the diameter of the bolt or double-headed bolt, with a minimum of 3 mm;

(6) Fasteners generally use spring washers, flat washers, countersunk holes, and other means of fastener protection;

Explosion-proof "d" and some of the dust explosion-proof equipment and other special fasteners must be used. Suppose the fastener pitch, tolerance fit, etc., does not meet the standard. In that case, it is easy to fall off, lose, and cause other problems, thereby affecting the explosion-proof performance of the equipment and forming safety hazards.

Therefore, explosion-proof equipment should be selected to meet the requirements of explosion-proof standards and through the test to verify the fasteners, and can only be replaced with the same fasteners.

Explosion-proof shells generally have two types: flat and stop.

The bolt plays a fastening role for the plane structure and ensures plane clearance. For stop structure, when the explosion-proof surface is only considered when the cylinder part, the bolt only plays a fastening role, and at the same time, it ensures that the role of the plane part of the gap.

In the selection of shell fasteners, it is preferred to distinguish the role of the explosion-proof shell. Does it only play a role in fastening, or does it both play a role in fastening and ensure the role of plane clearance? Then, confirm the maximum axial load of the bolt to choose the appropriate bolt.