Fuel Hose NBR 150 PSI – Ø38 mm / Ø51 mm (Oil-Resistant Reinforced Hose)

This high-strength NBR 150 PSI fuel hose is purpose-built for demanding fuel transfer applications on boats and in industrial settings. It features a multi-layer construction: the inner tube is made of black NBR (nitrile) rubber which is electrically conductive to dissipate static buildup – a crucial safety feature when transferring flammable fuels as it helps prevent static sparks. The NBR inner lining is formulated to resist gasoline, diesel, biodiesel, and fuel blends with high aromatic content (up to 50%) without hardening, swelling, or cracking. The hose’s reinforcement consists of tightly woven synthetic yarns of high tensile strength, combined with a spirally embedded steel wire helix – this combination gives the hose exceptional rigidity and collapse resistance, allowing it to maintain shape under vacuum (suction) or bending. Surrounding the reinforcement is the outer cover made of black CR (chloroprene, commonly known as neoprene). This outer layer is engineered to withstand marine and environmental conditions: it is abrasion-resistant (stands up to rubbing and dragging), ozone and UV resistant (won’t crack or degrade under sunlight exposure), and immune to damage from contact with oils, fuels, and many chemicals that would attack ordinary rubber. The neoprene cover is also flame-retardant, a key safety attribute for hoses routed through engine compartments – it will not propagate flame in the event of a fire. The hose is rated for a working pressure of 10 bar (150 PSI) and temperatures from -30°C to +80°C, covering the full range of marine fuel system demands. A safety factor of 3:1 (reducing to about 2.5:1 at the largest diameter) means the hose’s burst pressure and vacuum collapse limits are roughly three times higher than its working conditions, providing a substantial safety margin in operation.

Variants and Recommended Use:

• Ø38 mm inner diameter (1.5"): This size is a common standard for fuel deck fill hoses on many powerboats and smaller yachts. It is typically used to connect the deck fill fitting on the boat’s deck to the built-in fuel tank. We recommend the 38 mm hose for small to medium vessels (approximately 16–33 feet in length) where fueling flow rates are moderate. The Ø38 hose can also serve as a heavy-duty fuel feed line between a fixed tank and the engine (for example, for diesel engines on sailboats), or for connecting to fuel separators/filters. Its flexibility and strength make it suitable in locations with vibration – for instance, as a section between the tank outlet and rigid fuel lines on the engine, allowing movement without stress.
• Ø51 mm inner diameter (2"): The larger diameter is ideal for high-flow applications. It’s often employed on bigger yachts and workboats for fuel filling systems – the larger bore allows faster tank filling on large fuel tanks, reducing the chance of backsplash or overflow during refueling. The Ø51 mm hose is also well-suited for bulk fuel transfer on land – e.g. connecting a stationary diesel storage tank to a tanker truck or fuel pump, where both suction and delivery might be required. Additionally, thanks to the steel wire reinforcement, this hose can double as a marine wet exhaust hose for inboard engines (carrying cooling water and exhaust). It can handle the temperature of warm coolant water and exhaust gas pulsations while retaining flexibility and structural integrity. This makes it a versatile option for dual-purpose spares on a vessel.
• Installation and Tips: Both sizes are designed to meet marine standards and fit common marine hose barb fittings. When installing below the waterline or in critical fuel lines, we advise using double stainless steel hose clamps on each end for maximum security. These hoses conform to relevant marine certifications (e.g. ISO 7840 A1 for fixed fuel hoses), meaning they are approved for use in enclosed engine spaces in terms of fire resistance and fuel permeability. This ensures you meet regulations and safety norms. Periodically inspect the hoses for any signs of surface cracks, soft spots, or abrasion – the NBR/CR construction is built for long service life, but timely replacement at signs of wear ensures the safety of your vessel. By using these heavy-duty hoses in your fuel system, you’re investing in reliability, safety, and peace of mind during every voyage.