The non sparking explosion-proof and anti-corrosion device is mainly used in hazardous areas such as chemical, refining, and mining where explosive media and corrosive environments exist. Its installation and maintenance quality directly affect the safety and service life of equipment operation.
Installation precautions
（1） Preparation before installation
-Environmental and working condition verification: Confirm the explosion hazard level (such as gas group, dust category), corrosive medium type (acid, alkali, salt spray, etc.), concentration, temperature and humidity range of the installation environment, ensure that the explosion-proof level and anti-corrosion level of the selected device match the actual working conditions, and avoid safety hazards caused by inconsistent selection.
-Equipment integrity inspection: After opening the box, check one by one whether the main body and accessories of the device (such as explosion-proof plates, sealing gaskets, fasteners, and wiring terminals) are complete, and whether there are any defects such as collision damage, coating peeling, cracks, etc. on the appearance; Check whether the insulation layer of electrical components (such as junction boxes, plugs and sockets) is intact, without damage or aging.
-Qualification confirmation of installation personnel: Installation personnel must have corresponding qualifications for installing explosion-proof electrical equipment, be familiar with relevant explosion-proof and anti-corrosion regulations (such as GB 3836, GB 12476), and strictly prohibit unlicensed personnel from operating.
-Preparation of tools and accessories: Select installation tools that meet explosion-proof requirements (such as spark free wrenches and screwdrivers) to avoid the use of ordinary metal tools that may generate impact sparks; Prepare suitable anti-corrosion sealing materials (such as corrosion-resistant sealant, explosion-proof sealing joints) to ensure that the anti-corrosion performance of the auxiliary materials matches the device.
（2） Installation Process Specification
-Installation location selection: Avoid installing the device in direct sunlight, direct rainwater erosion, severe vibration, or near heat sources; For explosion venting devices, it is necessary to ensure that there are no obstacles in the direction of explosion venting, and to keep them away from personnel passages and areas where flammable and explosive materials are stored. The distance between the explosion venting port and adjacent equipment or walls must comply with regulatory requirements.
-Requirements for fixing and connection: Use original factory matching fasteners to fix the device, with even tightening force to avoid excessive tightening that may cause deformation of the shell or seal failure; Corrosion resistant gaskets should be installed at the flange connection to ensure a tight seal and prevent corrosive media from infiltrating; When electrical wiring, the wire specifications should match the terminals, the wiring should be firm, and contact sparks caused by virtual connections should be avoided. At the same time, anti-corrosion protection of the cables should be done (such as wearing anti-corrosion sleeves).
-Grounding and anti-static treatment: All explosion-proof and anti-corrosion devices must be reliably grounded, and the grounding resistance must meet the design requirements (usually not greater than 4 Ω). The grounding main line should be made of corrosion-resistant materials (such as stainless steel flat steel) to avoid the risk of static electricity accumulation or leakage caused by poor grounding; For mobile devices, it is necessary to ensure good contact of the grounding terminal and it is strictly prohibited to operate in an ungrounded state.
-Anti corrosion coating protection: During installation, avoid scratching or bumping the anti-corrosion coating of the device shell (such as epoxy resin coating, stainless steel surface). If it is accidentally damaged, it should be repaired in a timely manner with the original anti-corrosion coating provided by the factory to ensure the integrity of the coating; In highly corrosive environments, an additional anti-corrosion protective cover can be installed.
（3） Acceptance after installation
-Sealing test: Conduct pressure or air tightness tests on the sealed parts to confirm that there is no leakage, especially in corrosive media environments where leakage may cause corrosion and failure of internal components of the device.
-Electrical performance testing: Use professional instruments to test the insulation resistance and grounding resistance of equipment, verify the continuity of electrical circuits, and ensure that electrical components operate normally without short circuits or leakage risks.
-Trial operation verification: Conduct a trial operation under no-load conditions to check whether the device runs smoothly and whether there are any abnormal noises or heating phenomena; For the explosion-proof device, a simulated pressure relief test can be conducted to confirm the sensitive action of the explosion-proof plate and the normal function of the flame extinguishing module.