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Engineered for hazardous industrial electrical installations — IP68, UL Listed, ATEX compliant solutions for maximum safety and reliability.
An explosion proof cable gland is a certified electrical fitting designed to provide a secure, flameproof, and sealed entry point where cables penetrate enclosures, junction boxes, control panels, or equipment housings in hazardous locations. Unlike standard cable glands, explosion proof variants are engineered to prevent the ignition of flammable gases, vapors, dusts, or fibers present in the surrounding environment.
These components serve a dual function: they mechanically anchor and seal the cable entry point to prevent moisture, dust, and chemical ingress (achieving ratings up to IP68 and IP69K), and they provide an explosion-proof barrier that contains any internal arc or spark within the fitting — preventing flame propagation to the external atmosphere.
⚠ In industries where flammable substances are present, a single unprotected cable entry point can become a catastrophic ignition source. Explosion proof cable glands are not optional accessories — they are critical safety infrastructure mandated by international standards including ATEX, IECEx, NEC, and UL.
Modern explosion proof cable glands are manufactured in a range of materials — nickel-plated brass, 316L stainless steel, and high-grade nylon — to meet the diverse chemical, mechanical, and thermal demands of different industrial environments.
Industrial electrical installations in hazardous areas are governed by strict international and regional standards. The classification of hazardous zones (Zone 0, 1, 2 for gases; Zone 20, 21, 22 for dusts under ATEX/IECEx; Division 1 and 2 under NEC/UL) determines the exact level of protection required from every component — including cable glands.
Failure to use properly certified explosion proof cable glands in these zones can result in catastrophic explosions, fires, regulatory penalties, facility shutdowns, and most critically, loss of human life. Insurance companies and regulatory bodies worldwide now require documented proof of component certification before commissioning any hazardous area installation.
Beyond safety compliance, the right cable gland selection also determines long-term installation reliability. Industrial environments subject cable entries to vibration, thermal cycling, chemical exposure, and mechanical stress. A properly specified explosion proof cable gland maintains its seal integrity and flameproof properties across decades of service — dramatically reducing maintenance costs and unplanned downtime.
What sets industrial-grade explosion proof cable glands apart from conventional fittings
Engineered enclosure geometry prevents internal ignition from propagating to hazardous external atmospheres, meeting Ex d (flameproof) protection principles per IEC 60079-1.
Dual-compression sealing systems achieve IP68 continuous submersion protection and IP69K high-pressure wash resistance — essential for offshore, food processing, and wash-down environments.
ATEX, IECEx, UL, cUL, CE, RoHS, and ISO9001 certifications ensure global market acceptance and regulatory compliance across North America, Europe, Asia-Pacific, and the Middle East.
Specialized double-sealed armored variants accommodate SWA (steel wire armored), AWA, and braided armored cables — providing both electrical bonding of the armor and explosion-proof sealing in a single fitting.
316L stainless steel and nickel-plated brass construction withstands H2S, chlorine, seawater, acids, and industrial solvents — critical for petrochemical, marine, and chemical processing applications.
Rated for operating temperatures from -60°C to +120°C, with specialized variants for cryogenic and high-temperature process environments in LNG terminals and furnace installations.
The explosion proof cable gland market is experiencing accelerated growth driven by industrial expansion, tightening safety regulations, and the global energy transition.
📈 The Asia-Pacific region now accounts for over 38% of global hazardous area electrical equipment demand, driven by rapid industrialization in China, India, and Southeast Asia. Simultaneously, stricter enforcement of ATEX directives in Europe and NEC Article 500 in North America is driving retrofit demand in aging industrial facilities — creating a dual growth engine for explosion proof cable gland manufacturers with global certification portfolios.
Explosion proof cable glands serve as the critical interface between electrical systems and hazardous environments across a diverse range of industries
Drilling platforms, wellheads, refineries, and pipeline compressor stations represent the highest-demand environment for explosion proof cable glands. Zone 1 and Zone 2 classified areas require ATEX/IECEx Ex d or Ex e certified glands for motor terminal boxes, junction boxes, and instrument enclosures. Stainless steel variants are specified for offshore platforms due to H2S and saltwater exposure. Double-sealed armored glands protect power and signal cables running through hazardous process areas.
Chemical plants handling solvents, ammonia, chlorine, and other flammable or toxic substances require explosion proof cable glands rated for the specific gas group (IIA, IIB, IIC) and temperature class (T1–T6) of the hazardous substance present. Nickel-plated brass glands are standard for general chemical environments, while 316L stainless steel is specified where aggressive acids or chlorinated compounds are present. IP68 sealing prevents chemical vapor ingress into electrical enclosures.
Pharmaceutical production areas handling alcohol-based solvents, spray drying systems, and solvent extraction equipment are classified as Zone 1 or Zone 2 hazardous areas. Explosion proof cable glands in these environments must also comply with hygienic design requirements — smooth external surfaces, non-porous materials, and resistance to CIP (clean-in-place) chemical cleaning agents. Nylon variants are increasingly specified for their chemical resistance and non-sparking properties in these sensitive environments.
Underground coal mines, metal ore processing facilities, and tunnel boring operations present Zone 20/21 dust explosion hazards (coal dust, grain dust, metal powder). Explosion proof cable glands for these applications must meet Ex tb or Ex tc dust protection standards. Robust mechanical construction is essential to withstand the extreme vibration, impact, and abrasive dust conditions present in mining environments. Armored cable glands protect power supply cables to mining machinery and ventilation systems.
Liquefied natural gas terminals operate at cryogenic temperatures down to -162°C, creating unique challenges for cable gland materials and sealing compounds. Specialized low-temperature rated explosion proof cable glands maintain sealing integrity and flameproof properties across extreme thermal cycling. Stainless steel construction with PTFE-based sealing elements is the standard specification for LNG pump stations, loading arms, and vaporizer areas classified as Zone 1 methane hazardous areas.
While traditional renewable energy installations may not involve flammable gases, large-scale battery energy storage systems (BESS) present Zone 2 hydrogen explosion hazards during charging cycles. Additionally, solar farms in remote locations require IP68-rated cable glands to protect electrical connections from dust, moisture, and UV degradation. As the photovoltaic industry scales globally, demand for certified waterproof and explosion proof cable glands for inverter enclosures and combiner boxes is growing rapidly.
Modern rail transit systems, including metro, high-speed rail, and freight locomotives, require cable glands that combine vibration resistance, IP67/IP68 sealing, and flame-retardant properties for trackside electrical installations and on-board power distribution systems. Explosion proof cable glands are specifically required in fuel storage areas of diesel locomotive maintenance depots and hydrogen fuel cell transit systems — an emerging application as zero-emission rail technology expands globally.
Marine electrical installations aboard tankers, LNG carriers, FPSOs (Floating Production Storage and Offloading vessels), and naval vessels require cable glands certified to both explosion proof standards and marine classification society rules (DNV, Lloyd's Register, ABS, BV). Saltwater corrosion resistance, vibration immunity, and compatibility with fire-resistant cables are mandatory. The double-sealed armored explosion proof cable gland is the definitive solution for engine room and cargo area electrical installations on hazardous material carriers.
Military installations — ammunition storage facilities, fuel depots, naval shipyards, and defense manufacturing plants — require explosion proof electrical infrastructure meeting the most stringent safety standards. Cable glands used in these environments must often comply with both civilian ATEX/IECEx standards and military specifications (MIL-SPEC). Hoonsun's track record as a supplier of specialized waterproof cable glands for the Chinese aircraft carrier Liaoning demonstrates the company's capability to meet defense-grade quality requirements.
Technological innovation, regulatory evolution, and new industrial applications are transforming the explosion proof cable gland market
The proliferation of sensors, IIoT (Industrial Internet of Things) devices, and digital instrumentation in hazardous areas is driving demand for smaller, multi-cable explosion proof glands that accommodate data cables alongside power cables. Manufacturers are developing glands with integrated EMC (electromagnetic compatibility) shielding to protect sensitive digital signals in electrically noisy industrial environments.
The global push toward green hydrogen as a clean energy carrier is creating entirely new categories of hazardous area electrical installations. Hydrogen has unique explosion characteristics (Gas Group IIC, very wide flammability range) that require the highest-rated explosion proof components. Demand for IIC-rated cable glands for electrolysis plants, hydrogen refueling stations, and hydrogen pipeline compression stations is projected to grow exponentially through 2035.
Advanced engineering polymers — including glass-fiber reinforced nylon PA66, PVDF, and PEEK — are increasingly displacing traditional metal cable glands in applications where weight reduction, non-sparking properties, or non-magnetic requirements are priorities. These materials offer comparable mechanical strength to brass while providing superior chemical resistance and significantly lighter weight — critical for offshore and aerospace applications.
The ongoing convergence of ATEX (EU), IECEx (international), NEC (North America), and CNEX (China) standards is simplifying global product certification strategies. Manufacturers who invest in multi-standard certification — as Hoonsun has done with simultaneous ATEX, UL, CE, and IP68 certifications — gain significant competitive advantages in serving multinational EPC contractors and global industrial operators who require a single certified product for worldwide deployment.
Regulatory bodies and end-users increasingly require full digital traceability of explosion proof components — from raw material sourcing through manufacturing, testing, and installation. QR-coded cable glands with digital certificates of conformity, linked to cloud-based asset management systems, are emerging as the new standard for hazardous area installations. This trend aligns with broader Industry 4.0 digital twin and lifecycle management initiatives.
Labor costs and installation time in hazardous area construction projects are driving demand for explosion proof cable glands with tool-free or single-wrench installation features. Modular gland systems that allow field adjustment of cable range without changing the gland body reduce inventory complexity and installation errors — a key consideration as the global skilled electrical trades workforce faces increasing capacity constraints.
Founded in 2006, Zhejiang Hongxiang Connector Co., Ltd. is rooted in Yueqing, Zhejiang — a national hub for precision electrical manufacturing in China. After nearly two decades of dedicated development, the company has evolved into a large modern industrial connectivity solutions provider integrating R&D and design, large-scale intelligent manufacturing, global sales, and one-stop services. It stands as a benchmark enterprise of considerable scale and influence in China's cable gland and connector industry, and a key player among national high-tech enterprises.
Boasting a modern intelligent manufacturing industrial park, the company operates a standardized production workshop of over 10,000 square meters, equipped with multiple high-precision automated production lines, CNC machining centers, and a full-process quality control laboratory, establishing an industry-leading large-scale manufacturing system. With a core team of more than 300 professionals — over 30% of whom are R&D and quality management personnel — its annual production capacity exceeds 80 million units.
The company is fully capable of handling large-volume orders, urgent custom projects, and long-term strategic supply partnerships for domestic and international clients, ranking among the industry's top tier in both production capacity and delivery efficiency.
Its core product portfolio includes metal cable glands, nylon cable glands, waterproof cable glands, explosion-proof connectors, conduit fittings, and various customized connecting accessories. These products serve high-end sectors such as industrial electrical equipment, new energy equipment, rail transit, shipbuilding and heavy industry, construction machinery, military supporting facilities, and communication & industrial control.
Adhering to stringent manufacturing standards and uncompromising quality requirements, the company has obtained a series of internationally recognized certifications, including ISO9001, IATF16949 automotive quality management system, CE, UL, ATEX explosion-proof certification, RoHS, and IP68 high-protection rating. Its core technologies and product performance have reached international advanced levels, with nearly 100 invention and utility model patents to its name, continuously driving technological upgrading across the industry.
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Nearly two decades of continuous innovation in explosion proof cable gland manufacturing
Yueqing Hoonsun Cable Gland Manufacturing Co., Ltd. founded — mainly producing waterproof brass cable glands for industrial electrical installations.
Factory relocated; new workshop area reached 2,000 m² — enabling scaled production of explosion proof cable gland product lines.
Company introduced numerical control equipment and automatic counting machines, guiding the company toward automated production technology for cable glands.
The company developed a new design of cable seal and applied for patent — Patent Number ZL201020530888.7 — marking the start of proprietary IP development in explosion proof sealing technology.
Honored to be selected as supplier of specialized waterproof cable glands for the Aircraft Carrier "Liaoning" — a landmark milestone demonstrating defense-grade manufacturing capability. Products recognized and exported globally.
Company focused on R&D and development of various new products in stainless steel, nylon, brass, and other materials — diversified production to meet different industrial electrical installation requirements.
Company employees expanded to 80 people, and the core of the business went international — exporting explosion proof cable glands to Europe, North America, and the Middle East.
Company relocated again with a new brand identity — more modern and international in appearance, reflecting the company's global ambitions in the explosion proof connector market.
The company was upgraded and the company name was changed to Zhejiang Hoonsun Cable Gland Co., Ltd — signaling a new era of scale and specialization.
The factory expanded to over 120 employees and 200+ production equipment. Vigorously expanded into new industries including the photovoltaic (solar) industry. Company name confirmed as Zhejiang Hoonsun Cable Gland Co., Ltd — annual capacity exceeds 80 million units.
The company currently has more than 120 employees, more than 200 production equipment, and is equipped with a professional sales and management team, committed to improving production efficiency and product quality.
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Certified solutions for every hazardous area industrial electrical installation requirement — from standard cable entries to specialized armored and corrugated cable applications
