Understanding Hydraulic Hose Fittings in Tunnel Boring Machines and Shield Tunneling
Hydraulic hose fittings are critical components used in the efficient operation of Tunnel Boring Machines (TBM) and shield tunneling equipment. These fittings enable the smooth transfer of pressurized hydraulic fluids to various cylinders, motors, valves, and actuators that control the TBM's complex functions including cutting, steering, and thrust. As the tunneling industry increasingly adopts automation and remote operation, the demand for reliable, rugged, and high-performance hydraulic hose fittings has surged significantly.
The tunnel boring industry is currently experiencing robust growth worldwide, fueled by expanding urban infrastructure, metro systems, water and sewer tunnels, and utility conduits. TBMs, often working in challenging geological conditions, require hydraulic components that maintain integrity under extreme pressures, vibrations, and abrasive environments. This has led to innovations in hose fitting design, materials, and manufacturing technologies to enhance wear resistance, sealing performance, and ease of maintenance.
Commercial & Industrial Landscape of Hydraulic Hose Fittings in TBM Applications
The global market for hydraulic hose and fittings used in TBM and shield tunneling is a specialized subsector of the overall hydraulic components industry. Increased infrastructure budgets and environmental regulations have encouraged the use of more sophisticated machinery. This progression results in growing demand for customized hydraulic hose fittings optimized for specific functions such as excavator rotary joints, cutter head actuators, and thrust cylinders.
Manufacturers like Shaanxi Kelong New Material have emerged as industry leaders by combining precision manufacturing with high-tech materials sourced globally. With R&D investments exceeding 5% of annual revenue and advanced equipment imported from Italy and Austria, they deliver products that exceed the typical endurance and safety requirements of tunneling operations.
Furthermore, the adaptability of hydraulic systems through OEM and ODM services allows TBM manufacturers and operators to tailor fittings that ensure compatibility with diverse machine models and hydraulic oils — including bio-degradable options increasingly favored for eco-compliance during urban tunneling projects.
Deeper Analysis of Application Scenarios
In TBM and shield tunneling, hydraulic hose fittings connect hydraulic hoses to pumps, cylinders, and tools — ensuring fluid doesn’t leak and pressure is maintained for effective machine operation. Key challenges include resistance to abrasive slurry, extreme temperature fluctuations in underground environments, and constant mechanical stress.
Industry-grade hose fittings must provide:
- Leak-proof sealing technology to prevent environmental contamination and maintain hydraulic system efficiency.
- High tensile strength to resist bursting under ultra-high hydraulic pressures common in shield machines.
- Corrosion and abrasion resistance for longevity in harsh underground conditions involving moisture, chemical exposure, and rocks.
- Modularity and ease of maintenance to support quick replacement and minimize TBM downtime during critical tunneling operations.
Emerging trends are moving towards integrating smart hydraulic fittings equipped with pressure and temperature sensors to enable predictive maintenance, reducing unexpected failures during continuous tunneling projects. Additive manufacturing (3D printing) techniques are also being explored to rapidly prototype specialized fittings tailored for unique ground conditions or TBM models.
Kelong New Materials - Leading Supplier for TBM Hydraulic Components
Shaanxi Kelong New Material Technology Co., Ltd., founded in 1996, integrates research & development, production, and sales to deliver cutting-edge sealing and hydraulic hose products. Serving markets across North America, Western and Eastern Europe, Asia, and Oceania, the company specializes in combined sealing products and high-pressure hydraulic hoses predominantly applied in coal and metal mining, as well as civil aviation, high-speed railway, and wind power sectors.
The company’s adoption of technology from Austria’s DMH company, alongside fully imported Italian hydraulic hose manufacturing equipment, ensures top-tier quality and annual production exceeding 15 million meters of hydraulic hose. With over 500 employees and a dedicated R&D center, Kelong is positioned as a high-tech enterprise with ISO and IRIS certifications.
| Main Market | North America, Western Europe, Eastern Europe, Eastern Asia, Oceania |
| Business Type | Manufacturer, Trading Company |
| No. of Employees | 300~500 |
| Annual Sales | $60,000,000 - $80,000,000 |
| Year Established | 1996 |
| Export P.C. | 30% - 40% |
| Customers Served | 100+ |
DMH Company Technology
Sealing products adopt equipment and production techniques from DMH Company in Austria, ensuring premium quality and durability.
Italian Equipment
Hydraulic hose production facilities utilize complete sets of advanced equipment imported directly from Italy for consistent product excellence.
Currently, Kelong’s total assets amount to 600 million RMB, with an annual output value reaching 300 million RMB. The company employs over 400 staff, of which nearly 180 are engineers and technical professionals. College graduates constitute more than 40% of the workforce, and R&D personnel represent 17.5%. Over the past three years, research and development investments have exceeded 7% of total yearly income.
Having established itself as a top three player in the domestic coal machine sealing industry, Kelong continues to grow with ambitions to also rank among the top three for high-pressure rubber hoses and frame-type handling vehicles within two years. The company commands an 8% market share domestically and prioritizes technological innovation to keep its products and technology at industry forefronts.
The company extends a sincere welcome for collaboration and visits with global enterprises focused on coal mining and hydraulics, aiming to co-create a brilliant future.
OEM/ODM Capabilities
Kelong New Material is a dynamic manufacturer and distributor of sealing solutions, providing an extensive range of standard and customized products worldwide. Our in-house R&D and technology centers enable us to tailor products to specific customer needs, adapting to diverse working environments and conditions.
