Stainless Steel Explosion-proof Distribution Box Specifications

Stainless steel explosion-proof distribution boxes are designed for hazardous areas with high corrosion resistance, IP66/IP67 protection, and compliance with Ex d and Ex tb certifications.

Construction and Materials

These distribution boxes are typically made from high-quality stainless steel, offering excellent corrosion resistance, mechanical strength, and durability in harsh environments . The enclosures may feature a brushed finish and stainless steel fasteners for enhanced anti-corrosion performance. Some models use die-cast aluminum or welded carbon steel for alternative designs, with powder-coated surfaces for aluminum or carbon steel .

Explosion Protection and Certifications

• Protection Types: Ex d (flameproof) and Ex tb (dust protection by enclosure) for gas and dust hazardous areas .
• Standards Compliance: ATEX, IECEx, UL, GB/T3836, IEC 60079 series .
• Hazardous Zones: Suitable for Zone 1, Zone 2, Zone 21, Zone 22, and Class I/II, Division 1 environments .
• Gas Groups: Commonly IIB+H2, with some models supporting IIC .

Protection Ratings and Environmental Conditions

• Ingress Protection: IP66 or IP66/67 with O-ring, NEMA Types 4, 4X, 7, and 9 .
• Operating Temperature: Can operate in extreme temperatures, as low as -60 °C .
• Corrosion and Aging Resistance: Stainless steel surfaces and fasteners ensure long-term durability in offshore, marine, chemical, and hygiene-critical environments .

Design and Customization

• Modular Assembly: Allows flexible combination of circuits and multi-circuit configurations .
• Cable Entry Options: Multiple cable gland types and entry arrangements are available, with field-punchable conduit entries in some models .
• Windows and Visibility: Optional heat-resistant tempered glass windows for monitoring internal components .
• Internal Components: Can accommodate circuit breakers, AC contactors, thermal relays, surge protectors, universal changeover switches, fuses, instrument transformers, meters, and pushbuttons .
• Switch Handles: Standard PC material, customizable in metal, with padlock options for safety .

Applications

These boxes are suitable for oil and gas installations, offshore and marine environments, chemical processing plants, and hygiene-critical areas. Their robust construction ensures safe and reliable power distribution in explosive-prone areas while simplifying installation and maintenance .

In summary, stainless steel explosion-proof distribution boxes combine high mechanical strength, corrosion resistance, modular flexibility, and compliance with international explosion protection standards, making them ideal for demanding industrial applications.