D.O.T AIR BRAKE- COPPER TUBING FITTINGS Manufacturers

Legines Industrial Machinery Inc. is China's leading D.O.T AIR BRAKE – COPPER TUBING FITTINGS manufacturer and supplier, focusing on the precision manufacturing of brass fittings, stainless steel fittings and air brake hose assemblies. The factory covers an area of 3,600 square meters, equipped with 45 fully automatic CNC machine tools, 35 semi-automatic CNC processing equipment and 3 sets of high-precision testing instruments, with an annual output of more than 2.5 million sets of various parts assemblies, and has strong batch delivery and quality assurance capabilities.

Copper materials naturally have excellent corrosion resistance, especially in commercial vehicles, engineering vehicles and trailer systems widely used in air brake systems, facing muddy water, salt spray, rain and snow, high humidity and other complex environments for a long time. A dense oxide film will form on the copper surface, effectively isolating external corrosion factors and extending the life of the material. Compared with iron or some alloy materials, copper will not rust due to exposure to moisture or salty air, which can ensure that the pipeline can maintain its sealing and connection strength under high-frequency use for several years.

For areas such as North America and Europe where there is rain and snow or road salting all year round, copper pipe fittings show long-term stability and maintenance economy far superior to other metal materials.

In the air brake system of commercial vehicles and trailers, air is transmitted in a compressed state, and the pipeline needs to withstand a working pressure of 6~12 bar for a long time, and some working conditions are even higher. Therefore, extremely high requirements are placed on the compressive strength and fatigue resistance of connecting pipe fittings.

Copper has excellent tensile strength and ductility. While maintaining strength, it has a certain plasticity, which can effectively prevent cracking and deformation of the pipe wall caused by impact or vibration. In the face of repeated start-stop, instantaneous high pressure changes, extreme climate temperature differences, etc., copper pipes can maintain good structural integrity and sealing.

Legines uses precision CNC processing technology to ensure that the copper pipe joints have high dimensional accuracy and fit tightly, further improving pressure resistance and system stability. This highly reliable pressure resistance is the key factor that makes copper pipe fittings widely used in heavy-duty vehicles. High-strength pressure resistance: The air brake system needs to withstand high-strength air pressure. Copper pipes have excellent deformation resistance and can maintain sealing and system stability for a long time. A large amount of heat may be generated during the air braking process. The good thermal conductivity of copper pipes can effectively help the system dissipate heat and avoid failures caused by excessive temperature.

The air brake system will generate a lot of heat during operation due to air compression, friction, frequent start and stop operations, etc. If the pipeline cannot dissipate heat in time, it may cause the joint to deform or the sealing material to age, causing leakage, slow braking response, affecting vehicle safety, overall system thermal decay, and reduced reliability. Copper is an excellent thermal conductor, and its thermal conductivity (about 400 W/m·K) is much higher than that of steel, stainless steel or aluminum. It can quickly conduct and diffuse heat from high-temperature points, reducing the risk of local overheating of the system. Especially under long-term slope braking and high-frequency braking conditions, the ability of copper pipes to quickly dissipate heat is crucial to ensuring braking performance. At the same time, the thermal expansion coefficient of copper pipes is moderate, and the connection of pipe fittings will not become loose or stuck due to temperature fluctuations, further improving the stability of the overall system.

The D.O.T standard has extremely high requirements for the size, wall thickness, and length of copper pipe fittings. Legines relies on advanced CNC equipment to ensure that the products comply with international regulations such as FMVSS571.106, CMVSS 106, and SAE J1402. As a key connecting component in the air brake system, D.O.T copper pipe fittings play the core role of connection, sealing, and air conduction. The product design meets the needs of rapid installation and maintenance, and can achieve rapid plug-in and replacement, thereby improving the maintenance efficiency of the entire vehicle. It has excellent high temperature and pressure resistance, maintains long-term stability in high-pressure and high-temperature use scenarios, and improves the safety level of the system. In the face of high-frequency vibration and impact generated during vehicle driving, copper pipes and accessories can maintain a firm connection without loosening, ensuring that the system does not release pressure. Copper materials naturally have a long service life, and combined with Legines' high-precision manufacturing, it can greatly reduce the frequency of after-sales and replacement, making it an ideal choice for commercial vehicles.