(such as petrochemical, coal mining, pharmaceutical, paint spraying, etc.). They are designed with special structures and certified to ensure that during operation, they do not generate sparks, arcs, or high-temperature surfaces that could ignite the surrounding explosive mixture. Here is key information about explosion-proof electric heaters, combined with industry trends for 2025-2026: 1. Core Features and Safety Standards Explosion-proof rating: Must comply with national standards (such as China's GB 3836 series) or international standards (such as ATEX, IECEx). Common explosion-proof markings include Ex d IIB T4 or Ex tD A21 IP65 T135°C, etc., representing different explosion-proof types (such as flameproof, dust explosion-proof), gas groups, and temperature groups. Structural design: Flameproof enclosure: Can withstand internal explosion pressure and prevent flame propagation to the outside. Sealing: The junction box and heating element connections must be strictly sealed to prevent flammable gases from entering. Temperature control protection: Usually equipped with multiple thermostats (working thermostat, over-temperature protection) to prevent surface temperature from exceeding allowable values. Material selection: Depending on the medium, corrosion-resistant and high-temperature-resistant materials such as stainless steel (304, 316L), titanium, Inconel, etc., are often used. 2. Main Application Scenarios Oil and Gas: Pipeline heat tracing, tank heating, crude oil dehydration. Chemical Industry: Reactor heating, thermal oil heaters, corrosive liquid heating. New Energy: Drying processes in lithium battery production, hydrogen facilities. Others: Coal mine underground equipment, flour mills (dust explosion-proof), paint spray booths. 3. Market Trends and Selection Suggestions for 2025-2026 According to the latest industry evaluations and market trends: Energy efficiency and intelligence: The new generation of explosion-proof heaters places more emphasis on thermal efficiency (generally above 93%) and intelligent control (such as PLC integration, remote monitoring, PID precise temperature control) to meet the 'dual carbon' goals and Industry 4.0 requirements. Increased customization: For extreme conditions (such as high-temperature molten salt, strong corrosive media, marine high salt spray environments), non-standard customization has become mainstream. For example, explosion-proof molten salt electric heaters need anti-solidification protection and extremely high temperature resistance. Authoritative certification is crucial: When purchasing, it is essential to confirm that the manufacturer has valid explosion-proof certificates and production licenses. According to 2025 evaluations, only about 23% of high-quality enterprises in the industry have passed multiple certifications (explosion-proof + ISO + CE, etc.). 4. Reference for Well-known Manufacturers (Based on 2025-2026 Recommendation List) The domestic electric heater industry is mainly concentrated in Yangzhong, Jiangsu, and other places. The following are some types of enterprises that have performed well in recent evaluations (specific procurement requires verification of the latest qualifications): Zhenjiang Yunlong Electric Heating Equipment Co., Ltd.: Focuses on non-standard industrial electric heaters, with standardized workshops and a complete quality system. Zhenjiang Huyang Electrical Equipment Co., Ltd.: Has 40 years of industry experience and many cases in high-performance special electric heaters. Zhenjiang Xuefeng Electric Co., Ltd.: Strong in marine electric heaters and adaptation to marine high salt spray environments, with explosion-proof certificates. Jiangsu Ding'an (transliteration/speculation): Has customization capabilities in high-end fields such as explosion-proof molten salt electric heaters. 5. Purchasing Considerations Clarify environmental parameters: Provide specific explosive gas/dust types, area classification (Zone 1, Zone 2, etc.), required temperature range, power, and installation method. Verify certificates: Require suppliers to provide explosion-proof certificates issued by national-level explosion-proof electrical product quality supervision and inspection centers, and verify that the parameters on the certificate match the actual product. After-sales service: Investigate the manufacturer's installation and commissioning capabilities and emergency response speed, especially in critical continuous production processes.
