The SAE 100R15 is a heavy-duty spiral wire hydraulic hose built for systems that demand constant high pressure, strong impulse resistance, and long service life. Kingdaflex manufactures R15 hose in both 4-wire and 6-wire spiral configurations, covering bore sizes from 3/8″ to 1-1/2″ with working pressures up to 420 bar (6,090 psi). Each hose is produced to SAE J517 specification and tested before shipment.
Standard dimensions and pressure ratings for Kingdaflex R15 hose. Contact us for full datasheets or non-standard sizes.
| Hose ID | OD (approx.) | Working Pressure | Burst Pressure | Min. Bend Radius |
|---|---|---|---|---|
| 3/8″ (10 mm) | 22 mm | 420 bar / 6,090 psi | 1,680 bar | 150 mm / 6″ |
| 1/2″ (12.5 mm) | 25 mm | 420 bar / 6,090 psi | 1,680 bar | 180 mm / 7″ |
| 5/8″ (16 mm) | 30 mm | 350 bar / 5,080 psi | 1,400 bar | 200 mm / 8″ |
| 3/4″ (19 mm) | 34 mm | 350 bar / 5,080 psi | 1,400 bar | 230 mm / 9″ |
| 1″ (25 mm) | 42 mm | 315 bar / 4,570 psi | 1,260 bar | 300 mm / 12″ |
| 1-1/4″ (31.5 mm) | 51 mm | 280 bar / 4,060 psi | 1,120 bar | 420 mm / 16.5″ |
| 1-1/2″ (38 mm) | 59 mm | 275 bar / 3,990 psi | 1,100 bar | 530 mm / 21″ |
Reinforcement: 4 or 6 spiral plies of high-tensile steel wire. Temperature: -40°C to +121°C. Fluid compatibility: petroleum-based hydraulic oil.
Excavators, wheel loaders, and hydraulic breakers generate sharp pressure spikes every time the working tool meets resistance. Standard braided hoses handle these peaks within design margins on lighter machines, but on larger equipment running continuous cycles, the R15’s spiral construction absorbs impulse loads more effectively and holds up longer between replacements.
Mining environments combine high system pressures with external abrasion from ore and rock particles, heavy vibration, and difficult replacement conditions. R15 hose is widely used on continuous miners, longwall equipment, and large hydraulic rock drills, where the thick outer cover and reinforced wall construction both contribute to extended service life.
BOP control systems, accumulator circuits, and high-pressure injection lines require hoses that hold rated pressure reliably over long intervals with no opportunity for in-service replacement. R15 is the standard choice in these applications. We supply full hydrostatic test certification and material traceability documentation on request.
We have been manufacturing hydraulic hose and fittings for over 20 years. Our R15 hose is produced on dedicated spiral winding lines with in-process dimensional checks and 100% hydrostatic pressure testing before dispatch. We supply OEMs, distributors, and MRO buyers across more than 30 countries, with consistent product quality across large and small order quantities.
4-wire for standard high-pressure applications; 6-wire for maximum working pressure and impulse resistance on smaller bore sizes.
Available in all standard SAE bore sizes from 3/8″ to 1-1/2″. Cut-to-length assemblies with swaged end fittings supplied to your specifications.
BSP, NPT, JIC, ORFS, DIN, and SAE flange connections available. Specify thread type, orientation, and ferrule style when requesting a quote.
Standard synthetic rubber cover for most applications. Abrasion-resistant cover compound available on request for installations with heavy external wear exposure.
Both are high-pressure spiral wire hoses with similar working pressure ranges. The R15 uses heavier wire plies and achieves higher working pressures on smaller bore sizes than the R13. The R13 is the dominant specification in European and DIN-aligned markets; the R15 is more common in North American OEM supply chains. In most applications, the two are technically interchangeable if pressure ratings are confirmed.
The SAE 100R15 standard covers petroleum-based hydraulic fluids as the primary application. For water-glycol or fire-resistant hydraulic fluids, confirm fluid compatibility with us before ordering, as the inner tube compound specification may need to be adjusted.
The working pressure should be matched to the maximum system pressure — not average operating pressure. Account for pressure spikes during load cycles. As a general rule, the hose working pressure rating should be at least equal to the system relief valve setting. For high-impulse applications, some engineers specify a hose rated 20–30% above system pressure for additional safety margin.
Yes. We supply R15 hose as bulk reel stock and as cut-to-length assemblies with swaged end fittings. Provide your bore size, overall assembly length, and fitting specifications when requesting a quote.
We supply hydrostatic pressure test certificates as standard. Material traceability documentation, third-party inspection reports, and factory audit support are available for oil and gas, mining, and OEM customers. Contact us to discuss your documentation requirements before placing an order.