How to improve the durability and anti-aging performance of Low-Pressure PTFE Engine Oil Pipe?

Improving the durability and anti-aging performance of Low-Pressure PTFE Engine Oil Pipe is the key to ensuring its long-term stable operation. This requires starting from multiple aspects such as material selection, manufacturing process, structural design, and use and maintenance. The following is a detailed analysis and solution:

1. Material optimization
(1) PTFE material modification
Enhanced temperature resistance: By adding reinforcing materials such as glass fiber, carbon fiber or graphite, the mechanical strength and high temperature resistance of PTFE can be improved.
Improved wear resistance: The use of fillers (such as bronze powder or molybdenum disulfide) can significantly improve the wear resistance of PTFE and extend its service life.
Anti-aging additives: Adding antioxidants or UV stabilizers to PTFE can slow down the aging process of the material during long-term use.
(2) Outer protective material
Stainless steel braided layer: Adding a stainless steel braided layer outside the PTFE liner can improve the overall strength and resistance to external damage of the oil pipe.
Weather-resistant coating: Adding a weather-resistant coating (such as polyurethane or silicone) to the outer layer can prevent the corrosion of the oil pipe by ultraviolet rays, moisture and other environmental factors.
2. Manufacturing process improvement
(1) Liner uniformity
Extrusion process optimization: Ensure that the thickness of the PTFE liner is uniform during the extrusion process to avoid weak points caused by local thinness.
Heat treatment control: Perform appropriate heat treatment after PTFE molding to eliminate internal stress and improve the stability of the material.
(2) Interlayer bonding technology
Chemical bonding: Use high-performance adhesives to firmly bond the PTFE liner to the outer protective material to prevent delamination.
Hot melt lamination: Use hot melt lamination technology to make the inner and outer layers of materials tightly bonded at the molecular level to improve overall durability.
(3) Defect detection

Non-destructive testing: Use ultrasonic testing or X-ray testing technology to check whether the PTFE liner has bubbles, cracks or other defects.
Pressure test: Perform pressure test on the finished oil pipe to ensure that it has no leakage or deformation within the design pressure range.
3. Structural design optimization
(1) Wall thickness design
Based on actual working conditions, the wall thickness of the PTFE lining and outer protective material should be reasonably designed to balance flexibility, strength and durability.
In areas with frequent bending, the wall thickness should be appropriately increased to improve fatigue resistance.
(2) Bending radius
Consider the minimum bending radius of the oil pipe during design to avoid cracking of the PTFE lining or damage to the outer layer due to excessive bending.
(3) Joint design
Use high-quality joints (such as stainless steel ferrule joints) and ensure good sealing performance to avoid leakage problems caused by joint failure.
4. Anti-aging measures
(1) Anti-ultraviolet treatment
If the oil pipe is exposed to sunlight, an anti-ultraviolet coating can be added to the outer layer or covered with a protective sleeve to reduce the degradation of PTFE by ultraviolet rays.
(2) Anti-oxidation treatment
Special treatment is performed on the inner surface of the oil pipe (such as anti-oxidation coating) to prevent the oxides in the engine oil from corroding the PTFE.
(3) Anti-chemical corrosion
Ensure that the PTFE material can resist corrosion from additives (such as detergents, antioxidants) and high-temperature decomposition products in the engine oil.
5. Usage and maintenance recommendations
(1) Proper installation
Avoid excessive bending or stretching of the oil pipe during installation to prevent permanent damage to the PTFE lining.
Ensure that there is enough clearance between the oil pipe and other components to avoid friction or extrusion.
(2) Regular inspection
Regularly check the appearance and sealing performance of the oil pipe, and promptly detect and replace aging or damaged oil pipes.
Check whether there is looseness or leakage at the joints, and retighten or replace the joints if necessary.
(3) Use high-quality oil
Choose high-quality engine oil to avoid impurities or chemical components in inferior oil that accelerate the aging of PTFE.

Improving the durability and anti-aging performance of Low-Pressure PTFE Engine Oil Pipe requires comprehensive consideration from aspects such as material selection, manufacturing process, structural design, and use and maintenance. Through scientific design and strict production management, the service life of the oil pipe can be effectively extended and its reliability can be improved.