Katerina Swanson
Diesel fuel hoses are used for the supply of oil-based products, including petroleum, gasoline, and diesel. They are designed to avoid leakage and the entry of foreign elements. When selecting a diesel fuel hose, it is important to consider the specific application and quality standards. The US Coast Guard (USCG) has rated four types of diesel fuel hoses: A1, A2, B1, and B2. The choice between these types depends on factors such as the location of the hose (above or below the deck) and fire resistance. Modern flexible hoses are designed to withstand blended gasolines and diesel fuels, but choosing the right hose has become more complex due to the makeup of modern fuels. Hose specifications, including the SAE number and material compatibility, should be carefully considered to ensure the hose can handle the fuel type and pressure requirements.
| Characteristics | Values |
|---|---|
| Hose Type | SAE 30R9, Submersible, Braided AN, Fabric-Reinforced, Low-Pressure Barrier |
| Hose Material | Fluoroelastomer, Chlorinated Polyethylene (CPE), Polytetrafluoroethylene (PTFE), Nitrile Rubber, Rubber, Butadiene Acrylonitrile Rubber |
| Hose Fittings | Stainless Steel, PVC, Fittings for PTFE Hose |
| Hose Applications | EFI Systems, Fuel Tanks, Marine, Fuel Extraction, Above Deck, Below Deck |
| Hose Maintenance | Regularly Check for Cracks, Rot or Sponginess, Wipe with Dry Rag, Check for Fuel Odor |
| Hose Safety | Rated for Specific Applications (USCG: A1, A2, B1, B2), Fire Resistant Type B Hose |
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What You'll Learn
Hose ratings and standards
US Coast Guard (USCG) Ratings:
The USCG has classified four types of diesel fuel hoses: A1, A2, B1, and B2. The Type B hose is recommended for all marine applications in the fuel pump and carburetor sections of the fuel line system to prevent fuel loss due to leakage. Type B hoses are also fire-resistant, reducing the risk of fire outbreaks.
American Boat & Yacht Council (ABYC) Recommendations:
The ABYC suggests using the Type B1 fuel hose for diesel-based applications. Type B1 hoses are designed to meet the specific requirements of diesel fuel systems.
SAE Standards:
The Society of Automotive Engineers (SAE) has developed standards for fuel hoses, with the SAE 30R9 hose being specifically designed for EFI systems with hose clamps and high working pressures. It can handle various fuels, including diesel, and resists fuel permeation. The SAE 30R7 hose is also rated for diesel applications but has a lower working pressure threshold.
EPA Permeation Standards:
The Environmental Protection Agency (EPA) has set standards for ultra-low permeation in fuel hoses to reduce fuel vapour emissions. Hoses that meet these standards are labelled A1-15 or B1-15, indicating both the fire rating and permeation rate of 15 g/m^2/day.
Hose Compatibility:
It is important to consider hose compatibility with modern fuel blends. For example, ethanol blends and additives can degrade rubber hoses, making them brittle and prone to leaks. Choosing a hose with an inner liner that can handle ethanol-blend fuels, such as the SAE 30R9 hose, is essential to prevent degradation and ensure long-term performance.
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Hose materials
Rubber Hoses: Traditionally, fuel hoses were made of rubber. While rubber hoses worked fine with older gasoline formulations, they are not always compatible with modern blended gasolines and diesel fuels. For example, ethanol blends and additives can dry out rubber hoses, making them brittle and prone to leaks. However, some modern rubber hoses, such as the Gates Barricade, are specifically designed to be compatible with diesel fuel and offer long-term reliability.
Nylon Hoses: Some diesel fuel hoses are made of nylon. However, over time, diesel fuel can leech through nylon, leading to a noticeable fuel smell.
Fluoroelastomer Hoses: The SAE 30R9 hose is designed for use with EFI systems and high working pressures. It features a fluoroelastomer inner liner that can handle diesel, gasoline, methanol, and ethanol-blend fuels. This type of hose also resists fuel permeation, making it emissions-legal.
Nitrile Hoses: Braided AN hoses with a nitrile rubber inner liner are commonly used, but they have similar issues with fuel permeation and compatibility with ethanol and gasoline additives as traditional rubber hoses.
Chlorinated Polyethylene (CPE): CPE synthetic rubber inner liners are not compatible with ethanol and ethanol-blend fuels.
Polytetrafluoroethylene (PTFE): Also known as Teflon, PTFE is a synthetic resin that offers excellent resistance to fuel permeation and compatibility with chemical additives. PTFE hoses can handle high pressure and have a high tolerance for heat. However, they are more expensive and require specific fittings.
Fabric-Reinforced Hoses: These hoses, made from butadiene acrylonitrile rubber (NBR/NBR), are designed specifically for use in fuel. They offer excellent resistance to abrasion, temperature, and heat. They are highly flexible and suitable for passenger cars.
When choosing a diesel fuel hose, it is essential to consider the specific application, fuel type, and environmental conditions. Additionally, it is important to follow safety standards and recommendations, such as those provided by the US Coast Guard (USCG) and the American Boat & Yacht Council (ABYC). Regular inspections and maintenance of fuel hoses are also crucial to ensure their longevity and safe operation.
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Hose fittings
When selecting hose fittings, it is important to ensure they are compatible with your diesel fuel hose and application. For example, the American Boat & Yacht Council (ABYC) recommends the Type B1 fuel hose for diesel-based applications, while the Type A1 hose is recommended for gasoline supply. Similarly, the United States Coast Guard (USCG) has specific standards for marine fuel hoses and fittings, and it is essential to choose products that meet these standards for safety and quality.
Different types of hose fittings are available depending on your specific needs. For example, the OilShield 3/4" Fuel Transfer Hose comes with MNPT fittings, designed for the safe transfer of gasoline, diesel, biodiesel, and kerosene. This hose includes a 1 Inch NPT End connection and a 1-inch NPT threaded fitting at the other end, with internal spring guards to prevent kinking.
Another option is to use "push-on" fittings that are simply pressed into the hose, providing a permanent attachment. However, it is important to beware of stainless steel and PVC-based fuel hose fittings. Additionally, when using a braided AN hose, it is important to check the specifications closely, as certain types of AN hose have issues with fuel permeation and compatibility with ethanol and gasoline additives. For example, hose with a chlorinated polyethylene (CPE) synthetic rubber inner liner is not compatible with ethanol and ethanol-blend fuels. Instead, look for an AN hose with a polytetrafluoroethylene (PTFE) inner liner, also known as Teflon, which can handle very high pressure and has a high tolerance for heat.
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Hose applications
Diesel fuel hoses are used for the supply of oil-based products, including petroleum, gasoline, diesel, and fuel oil. They are designed for suction and discharge, and are used with compatible fittings and couplings to prevent fuel leakage and the entry of foreign elements. Diesel fuel hoses are used for a variety of marine and fuel extraction applications.
When selecting a diesel fuel hose, it is important to consider the specific application and quality standards. The US Coast Guard (USCG) has rated four types of diesel fuel hoses: A1, A2, B1, and B2. For marine applications, the USCG recommends the use of the Type B hose at fuel pump and carburetor sections to prevent fuel loss. The Type B hose is also fire-resistant, reducing the risk of fire outbreaks.
The American Boat & Yacht Council (ABYC) recommends the Type B1 fuel hose for diesel-based applications. This type of hose is highly durable, heat-resistant, and can withstand high pressure without collapsing. To ensure long-term performance, it is crucial to purchase high-quality hoses and regularly inspect them for any signs of damage, such as cracks, rot, or sponginess.
Modern flexible hoses are designed to be compatible with blended gasolines and diesel fuels. However, it is important to select the appropriate type of hose to prevent issues with permeation, which is the evaporation of fuel vapour through the hose walls. Ethanol blends and additives can dry out rubber hoses, making them brittle and prone to leaks. Therefore, it is recommended to use hoses with a fluoroelastomer or polytetrafluoroethylene (PTFE) inner liner, commonly known as Teflon. These liners are compatible with various fuel types and can resist fuel permeation.
Additionally, fabric-reinforced tank fuel hoses are specifically designed for use in fuel pumps and tanks. They are made from butadiene acrylonitrile rubber (NBR/NBR), which offers excellent temperature and heat resistance, as well as flexibility. These hoses are suitable for passenger cars and are resistant to E10 and biodiesel.
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Hose suppliers
When it comes to hose suppliers for diesel fuel in Class 8, there are several options available. Here is some information on this:
Firstly, it is important to understand the characteristics of diesel fuel hoses. These are suction and discharge hoses specifically designed for the supply of oil-based products, including diesel, gasoline, and fuel oil. They are used with compatible fittings and couplings to prevent fuel leakage and the entry of foreign elements. Diesel fuel hoses are rated for specific applications using a combination of a number and a letter. For example, the US Coast Guard (USCG) has rated four types of diesel fuel hoses: A1, A2, B1, and B2. According to the USCG, marine applications should use the Type B hose at the fuel pump and carburetor sections of the fuel line system to prevent fuel loss. Type B hoses are also fire-resistant, reducing the risk of fire.
Now, let's discuss some of the leading hose suppliers:
Amazon Hose and Rubber Company
Amazon Hose & Rubber is a prominent supplier of hoses, fittings, and tubings, serving clients internationally. They offer a wide range of fuel hoses, including those suitable for diesel, gasoline, fuel oil, and other petroleum-based products. Amazon Hose and Rubber Company's products meet or exceed SAE standards and have received approval from the US Coast Guard. They provide hoses in various sizes, from 1/4" to 4", and can cater to low and medium pressure applications.
Gates
Gates is another reputable supplier of fuel hoses, offering environmentally-safe and fuel-efficient solutions. Their Barricade® Carburetion hose is designed to protect against aggressive fuel mixtures that can degrade basic rubber hoses. It features their patented five-layer Greenshield® technology, ensuring superior performance and fuel efficiency. Gates also offers the Barricade® Fuel Injection Hose, which is compatible with multiple fuel types, including gasoline, biodiesel, and diesel fuel. This hose utilizes their GreenShield® Barrier Technology to minimize fuel vapor loss.
Hose Centre
Hose Centre provides a range of fuel and multipurpose hoses suitable for various industries, including agriculture, construction, shipbuilding, and the oil and gas industry. Their hoses are designed for fuel and oil suction and delivery, with a focus on tank truck and general industrial applications. Hose Centre's products offer high tensile strength, crush resistance, and excellent abrasion resistance. Their Aggie Gas™ hose is specifically designed for dispensing gasoline, grease, kerosene, and petroleum oils.
When selecting a diesel fuel hose supplier, it is important to consider factors such as hose specifications, compatibility with diesel fuel, and the specific applications and regulations relevant to your use case.
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Frequently asked questions
Diesel fuel hoses are suction and discharge hoses designed for the supply of oil-based products, including petroleum, gasoline, diesel, and fuel oil. They are used with compatible fittings and couplings to prevent fuel leakage and the entry of foreign elements.
The US Coast Guard (USCG) has rated four types of diesel fuel hoses: A1, A2, B1, and B2. The Type B hose is fire-resistant and must be used for all marine applications at the fuel pump and carburetor sections of the fuel line system. The American Boat & Yacht Council (ABYC) recommends the Type B1 hose for diesel-based applications.
It is important to buy high-quality hoses to ensure long-term durability as petroleum products can cause significant wear and tear on fuel hoses. The hose should also be compatible with the type of fuel being used. For example, modern fuels with ethanol blends and additives can degrade rubber hoses, making them brittle and prone to leaks.
Amazon Hose & Rubber Company is a leading supplier of hoses, fittings, and tubing to international clients. They offer a variety of fuel hoses for different applications, including diesel, and provide fittings such as banding, crimping, and internally expanding options. Other suppliers include Gates, which offers fuel hoses with their patented five-layer GreenShield technology, and Amazon.com, which offers a range of diesel fuel hoses with customer reviews and ratings.
