What Is DIN 73379 Type B?

DIN 73379 is a German standard that defines specifications for rubber hoses used in fuel delivery systems. Type B hoses, in particular, are:

– Designed for fuel lines with higher pressure resistance

– Reinforced with textile braiding

– Built to resist ethanol-blended fuels (E10, E85)

– Heat- and weather-resistant for under-hood applications

– Often used in injection systems and fuel return lines

Applications

– Passenger cars and light trucks

– Agricultural and construction equipment

– Motorcycles and scooters

– Marine fuel systems

– Stationary engines and generators

Key Features of Arg Flex Fuel Hoses

• Compliant with DIN 73379 Type B standards
• Suitable for gasoline, diesel, biodiesel, and fuel mixtures
• Working temperature range: -30°C to +100°C (short peaks to 125°C)
• High flexibility for easy routing in tight engine bays
• Textile reinforcement provides burst strength and kink resistance
• Smooth inner tube minimizes fuel absorption and vapor loss

Installation & Maintenance Tips

• Cut hoses cleanly using a sharp blade to avoid fiber fraying
• Use proper hose clamps to ensure leak-free operation
• Avoid contact with sharp edges and high-heat engine parts
• Replace hoses at signs of hardening, swelling, or cracking

Why Choose Arg Flex Ltd?

At Arg Flex Ltd, our DIN 73379 Type B fuel hoses are manufactured with precision to meet demanding automotive and industrial standards. We offer multiple diameters and lengths, along with guidance to help you choose the right fuel line solution for your application.

Conclusion

Fuel hoses are a critical component in delivering fuel safely and reliably to your engine. With DIN 73379 Type B-compliant hoses from Arg Flex Ltd, you can ensure optimal fuel flow, chemical resistance, and long-term performance even under demanding operating conditions.