Our SAE Bolted Flange Fitting is a heavy-duty hydraulic connection solution engineered exclusively for high-pressure, high-flow hydraulic systems in mining machinery and extreme-duty industrial equipment.
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Manufactured to meet stringent SAE J518 and ISO 6162 global standards, this bolted flange fitting resolves critical connection challenges like loosening, leakage, and premature failure in high-vibration, shock-heavy operating environments. It is the preferred hydraulic connection component for mine operators, heavy machinery OEMs, and hydraulic system engineering teams, delivering reliable performance for large-diameter, high-flow hydraulic circuits that demand uncompromising holding power and sealing stability.
 Fiber weaving |  Steel wire winding |  Wire braiding machine |
 Friction testing machine |  High-speed joint venture |  Storehouse |
Our mining machinery hydraulic flange fitting adopts an advanced O-ring face seal (ORFS) design with a precision-machined flat face O-ring groove, creating a dual-sealing system of elastomer primary sealing and metal-to-metal backup support. This structure delivers exceptional resistance to vibration, pressure spikes, and thermal cycling, effectively eliminating leaks even in the harsh, shock-prone environments common in mining and heavy industrial operations.
Unlike traditional threaded fittings, our SAE J518 bolted hydraulic flange distributes clamping load evenly across the flange face via a 4-bolt mounting system, delivering superior holding power in high-flow, high-pressure hydraulic circuits. It is available in two industry-standard pressure ratings: SAE J518 Code 61 (standard pressure, up to 3000–5000 PSI, size-dependent) and Code 62 (high pressure, up to 6000 PSI for smaller sizes), adapting to diverse pressure requirements in heavy-duty applications.
Built from high-quality carbon steel with a corrosion-resistant zinc or chrome plating finish, with optional 304/316 stainless steel upgrades available for acidic, humid, or highly corrosive mining environments. This robust material build ensures long-term wear resistance, reduces unplanned maintenance downtime, and lowers total cost of ownership for your hydraulic systems.
We offer our high pressure hydraulic flange fitting in a standard size range from 1/2" to 3", with larger custom sizes available on request. Available configurations include straight, 45° elbow, and 90° elbow designs to accommodate complex hose routing needs in tight equipment spaces. We also provide full customization services, including material upgrades, custom angles, specialized plating, integrated hose ends, and complete bolt kit inclusion, all while maintaining full compliance with SAE J518 and ISO 6162 standards.
Our vibration-resistant SAE hydraulic flange fitting is purpose-built for extreme-duty hydraulic systems, with core industry applications including mining machinery (roadheaders, hydraulic supports, mining dump trucks, shearer loaders), heavy construction equipment (large excavators, crawler cranes, tunnel boring machines), industrial hydraulic systems (high-flow hydraulic presses, steel mill equipment, offshore drilling rigs), and oil & gas equipment (wellhead control systems, hydraulic fracturing equipment).
Parameter | Specification Details |
Compliance Standards | SAE J518 (Code 61/Code 62), ISO 6162 |
Standard Size Range | 1/2" to 3" (larger sizes available via custom order) |
Pressure Rating | Code 61: Up to 3000–5000 PSI (size-dependent); Code 62: Up to 6000 PSI (smaller sizes) |
Core Material Options | High-grade carbon steel (zinc/chrome plated); 304/316 stainless steel (optional) |
Available Configurations | Straight, 45° elbow, 90° elbow |
Primary Seal Type | O-ring face seal (ORFS) with metal-to-metal backup |
Compatible Fluids | Petroleum-based hydraulic fluids, synthetic hydraulic fluids, water-glycol fluids |
