Explosion-proof Rating And Material Selection Requirements For Waterproof Junction Boxes

Petrochemical plant areas contain flammable and explosive gases such as methane, ethylene, and benzene. Therefore, type plastic weatherproof electrical box must meet the explosion-proof performance requirements specified in GB3836 standard. Type waterproof junction box explosion-proof equipment uses aluminum alloy or 316L stainless steel, with a shell thickness of 6-10 mm, capable of withstanding internal explosion pressure without rupture. The explosion-proof markings for waterproof distribution box are ExdⅡBT4 or ExdⅡCT6, and it is suitable for Zone 1 or Zone 2 hazardous locations. The sealing ring is made of fluororubber or silicone rubber, withstanding temperatures from -40℃ to +150℃, maintaining a tight seal near steam tracing pipelines in petrochemical plants. Type waterproof electrical box has a brass nickel-plated cable connector at the inlet, with a tightening nut torque of 25-30 N·m, and the cable sheath and sealing gasket form an IP66 or higher protection rating.