Composite Hose | Chemical, Petrol Transfer Hose Manufacturer – Strongflex
In the industrial field, composite hoses are transmission elements composed of multiple layers, combining advantages such as pressure resistance, temperature resistance, corrosion resistance, and flexibility. They are not single-layer pipes, but rather achieve specific performance combinations through a combination of materials including an inner tube, reinforcing layers, and an outer cover.
Our composite hoses can transport various liquids and gases, such as hydrocarbons, chemicals, petroleum, fuel oil, and steam, and can withstand harsh environments including low temperatures, high temperatures, and corrosive conditions. They are widely used in the chemical, petroleum, food, pharmaceutical, and electronics industries.
Structure of Composite Hoses
First, the basic structure of a composite hose typically consists of three core parts: an inner liner, a reinforcing layer, and an outer sheath. The inner liner is the part in direct contact with the medium, preventing corrosion and minimizing friction between the medium and the hose wall. The reinforcing layer, located between the inner liner and the outer sheath, provides strength, tensile strength, impact resistance, and maintains flexibility at certain angles. The outer sheath is the outermost layer, providing protection, abrasion resistance, UV resistance, and improved durability. These three layers together determine the hose’s applicable media, operating pressure, operating temperature, and service life.
Composite Hoses Structure
Product Category
COMPOSITE HOSE | PETROL
Petroleum Composite Hose
Construction:
Inner Wire: Galvanized steel / Stainless steel
Outer Wire: Galvanized steel
Tube:Polypropylene / Polyamide
Cover:PVC Coating
Standard:EN 13765:2010
Temperature Range: -30℃+100℃
Safety Factor: 4:1
Vacuum: 0.9 bar
COMPOSITE HOSE | CHEMICAL
Chemical Composite Hose
Construction:
Inner Wire: Stainless Steel 316L
Outer Wire: Stainless Steel 316L
Inner Lining:PTFE/ Polypropylene
Cover: PVC Coated Polyester Cloth
Standard: EN 13765:2010
Temperature Range: -30℃ a +100℃
Safety Factor: 4 :1
Vacuum: 0.9 bar
COMPOSITE HOSE | CRYOGENIC
CRYOGENICCOMPOSITE HOSE
Construction:
Inner Wire: Stainless Steel 316L
Outer Wire:Stainless Steel 316L
Inner Lining:PTFE/Fiber Glass
Cover:PVC Coated Polyester Cloth
Standard:EN 13765:2010
Temperature Range:-30℃+240℃
Safety Factor:4:1
Vacuum:0.9 bar
Materials for Composite Hoses
For the inner tube, material selection is crucial in determining the hose’s chemical compatibility and hygienic performance. Common inner tube materials include fluoroplastics (such as polytetrafluoroethylene, PTFE), nitrile rubber, neoprene rubber, polyethylene, and polyurethane. Different materials exhibit varying degrees of corrosion resistance, temperature resistance, and self-cleaning properties.
For example, in the chemical and pharmaceutical industries, PTFE linings offer excellent chemical resistance and a wide temperature range, making them suitable for highly acidic and alkaline media and high-temperature applications; nitrile rubber linings, on the other hand, exhibit good resistance to hydrocarbon media and are relatively inexpensive. In high-end applications, some linings also employ coating or layering structures to improve surface smoothness and ease of cleaning, reducing media retention on the inner wall.
The reinforcing layer directly determines the pressure resistance, torsion resistance, bending resistance, and fatigue resistance of composite hoses. There are various ways to implement the reinforcing layer, commonly including spiral winding of metal wires or strips, braiding of synthetic fibers (such as polyester, nylon, and aramid), and composite material lamination. Metal spiral reinforcement is typically suitable for high-pressure and high-temperature applications, exhibiting good radial and radial resilience, as well as good chemical resistance; fiber braiding excels in flexibility and fatigue resistance, facilitating larger bending radii and lower resilience.
Some structures also employ multi-layer reinforcement, such as combining an inner fiber braid with an outer metal corrugation layer, to balance lightweight and strength. It is important to note that the structure and materials of the reinforcing layer must be selected based on the working pressure, temperature, type of medium, and installation method; incorrect combinations may increase the risk of failure.
The outer sheath primarily serves to protect against external environmental factors and enhance durability. Material selection typically considers properties such as abrasion resistance, weather resistance, oil resistance, and UV resistance. Common outer layer materials include EPDM (ethylene propylene diene monomer rubber), neoprene rubber, nitrile rubber, polyurethane, and EPDM rubber. High-temperature coatings or overlays are often added to enhance UV and aging resistance when necessary. The outer sheath must not only protect the inner lining and reinforcing layer but also withstand external mechanical wear, friction, and potential chemical penetration. Therefore, its selection must comprehensively consider factors such as handling frequency, ambient temperature, humidity, and corrosive substances in the industrial setting.
Besides the three core layers, the accessories and seals directly impact the actual connectivity and reliability of the composite hose. End types include flat ends, flanges, threaded ends, and quick-connect fittings, each catering to different connection requirements and application scenarios. The selection of end caps must consider the medium pressure, temperature, fluid viscosity, and compatibility with the system’s components. For example, chemical reactions or thermal expansion mismatches between metal end caps and lining materials should be avoided to prevent leaks.
Some high-pressure applications also employ end cap designs with sealing rings to enhance sealing. The end cap fixing method is also noteworthy; threaded or flanged connections have a significant impact on leakage risk and maintenance efficiency during field installation, and the manufacturer’s torque and seal selection guidelines must be followed during installation.
Composite Hose & Accessories
Strongflex Composite Hose Characteristics
1. Lightweight and Flexible, Easy to Handle and Operate: Composite hoses are 30% lighter than metal hoses and 40% lighter than rubber hoses of the same specifications, significantly reducing labor intensity. Their radius of curvature is only 1/3 that of rubber/metal hoses, maintaining a rounded shape even under extreme bending, preventing folding, inner wall detachment, or hose cracking. Suitable for confined spaces (such as tank trucks and docks) or frequent movement scenarios.
2. Strong Corrosion Resistance, Suitable for Various Media: The inner layer uses corrosion-resistant materials (such as PTFE, PE, and PP), resisting corrosion from acids, alkalis (sulfuric acid, nitric acid, sodium hydroxide), organic solvents (gasoline, diesel, toluene), oils, and other corrosive media. The outer layer material has chemical oxidation resistance, extending the overall service life of the hose. Suitable for chemical, food, and pharmaceutical industries.
3. Resistant to high and low temperatures, adaptable to extreme environments: The normal operating temperature range is -60℃ to 200℃, with some special models able to withstand temperatures from -200℃ (e.g., LNG transportation) to 800℃ (e.g., high-temperature hot oil). The hose will not become brittle or crack at low temperatures, nor will it soften or deform at high temperatures, making it suitable for extreme scenarios such as cryogenic storage and high-temperature chemical processing.
4. Excellent sealing performance, no leakage risk: Utilizing a multi-layer sealing structure (inner layer, reinforcing layer, and outer layer), combined with high-quality adhesives, ensures the hose is crack-free and leak-free; meeting the hygiene and safety standards of the food (FDA), pharmaceutical (GMP), and chemical industries, avoiding pollution or safety hazards caused by media leakage.
5. Anti-aging and durable, long service life: The outer material is coated with anti-UV and anti-ozone coatings, effectively resisting the erosion of the external environment (sunlight, rain, oxygen); under normal use, the service life can reach 5-10 years (far longer than the 2-3 years of traditional rubber hoses), reducing replacement frequency and maintenance costs.
6. Excellent Static Electricity Conductivity, Safe and Reliable: The inner spiral steel wires and outer steel wires form a closed circuit, effectively dissipating static electricity generated during the transport of flammable and explosive media (such as gasoline and diesel). Professional testing (e.g., aviation fuel standards) shows that the electrostatic potential value is far below the national safety threshold, effectively preventing fires or explosions.
7. Flexibility and Bending Fatigue Resistance: The pipe body is composed of multiple layers of composite materials, possessing excellent flexibility and bending fatigue resistance. It will not break under frequent bending (such as tank truck loading and unloading, dock handling), making it suitable for applications requiring repeated movement or twisting.
Applications of Composite Hose
Composite hoses are designed for safe and reliable transfer of oil, petrol, gases, and chemicals across a wide range of industries.
Composite Hose Application
1. Oil & Petroleum Industry
Used for loading and unloading fuels, diesel, gasoline, kerosene, lubricating oils, and crude oil from tank trucks, railcars, and marine tankers.
Common Types:
Fuel Composite Hose / Petroleum Composite Hose / Ship-to-Shore Hose
2. Chemical & Petrochemical Industry
Used for acid, solvent, and chemical transfer in chemical plants, refineries, and storage terminals.
Safely handles aggressive chemicals such as sulfuric acid, hydrochloric acid, ethanol, acetone, and toluene.
Common Types:
Chemical Composite Hose / Solvent Transfer Hose / Acid & Alkali Hose
3. Marine Industry
Used in ship-to-shore transfer systems, loading arms, and offshore platforms for oil, fuel, and chemical handling.
Common Types:
Marine Composite Hose / Offshore Composite Hose
4. Transport & Logistics Industry
Mounted on tank trucks, railcars, and container loading systems for the transfer of fuels, lubricants, and chemicals.
Common Types: Fuel Transfer Hose / Chemical Loading Hose
5. Industrial Manufacturing
Used in industrial plants, machinery, and process systems to transfer oils, coolants, and solvents.
Common Types: Industrial Composite Hose / Solvent Hose
6. Pharmaceutical & Food Industry (Optional Type)
For the transfer of non-contaminating liquids, alcohols, or light chemicals in controlled environments. (Hose meeting the relevant industry requirements can be used for transporting non-contaminating liquids, alcohols, or light chemicals.)
Industrial composite hoses are used in production
FAQs
What is a composite hose?
Which is better composite hose or rubber hose?
Composite hoses offer superior corrosion resistance, wear resistance, and high-temperature resistance, while ordinary rubber hoses offer good oil resistance, pressure resistance, and a price advantage.
What is the pressure rating for composite hose?