Intrinsically Safe Certification and Explosion-Proof Certification are two common types of different explosion protection, which fundamentally differ in their explosion protection principles, mainly reflected in the following aspects:
Explosion-proof certification typically involves using explosion-proof enclosures. These enclosures must have sufficient thickness and strength, so that even if an explosion occurs inside the equipment, the flame will be extinguished due to the width, gap, and roughness of the joint surface of the explosion-proof enclosure, thus preventing ignition of the external hazardous environment. On the other hand, even if an explosion occurs in the external hazardous area, the explosion-proof enclosure exhibits anti-explosion properties. In summary, explosion-proof enclosures can withstand explosions as well as resist them, but the equipment may be rather heavy.
The intrinsic safety certification, also known as inherent safety certification, is achieved by limiting circuit energy, ensuring that even in the event of a predicted fault, the generated energy is not sufficient to ignite surrounding explosive substances, thereby achieving inherent safety. Consequently, intrinsic safety products have higher requirements for equipment circuits and operating power, and are generally suitable for handheld devices and low-power products.
Additionally, there is a composite explosion-proof certification. This indicates that the product cannot achieve explosion-proofing with a single type, and it must employ two or more types of explosion-proofing. For instance, explosion-proof equipment with antennas, where the antenna section is typically intrinsically safe, such equipment is both explosion-proof and intrinsically safe. However, it is important to note that composite explosion-proof products do not necessarily mean the product must meet all requirements of different explosion-proof types, and their explosion-proof grade is not necessarily higher than that of a single type. The explosion-proof grade of the product primarily depends on the gas/dust category, temperature class, and equipment protection level.
For more information on explosion-proof certifications like intrinsic safety and flameproof, feel free to consult us anytime.Shenzhen ZhongNuo Testing Technology Co., Ltd.。
