How to ensure that Oil Pipe Screws can effectively seal when connecting oil pipes to prevent oil leakage?

Ensuring that Oil Pipe Screws can effectively seal and prevent oil leakage when connecting oil pipes mainly depends on the design of the screws, material selection, precision control and the application of sealing technology. The following are some key measures and methods to ensure that the oil pipe screws achieve good sealing effect during use:

The thread of the oil pipe screw is the core part to ensure the sealing effect. The precision of the thread processing directly affects the tightness of the interface between the screw and the oil pipe. The size, shape, and matching tolerance of the thread should be strictly controlled to ensure that the connection between the screw and the oil pipe can fit tightly and avoid leakage. Generally, the tolerance and surface roughness of the thread need to meet the standard requirements to ensure the perfect matching of the sealing surface.
The design of the thread should take into account the use environment, such as temperature, pressure and type of medium. For example, the use of special sealing thread design, such as NPT (American pipe thread) or BSP (British pipe thread) can improve the sealing effect.

Sealing washers are often used to enhance the sealing effect at the connection between the oil pipe screw and the oil pipe. Sealing washers can effectively fill the tiny gaps in the threaded connection to prevent oil leakage. The material of the sealing gasket is usually rubber, PTFE (polytetrafluoroethylene), metal, etc. The specific choice depends on the pressure, temperature and medium type of the working environment.
O-ring is a common sealing element that can fill the gap of the connection part through elastic deformation to ensure that the liquid or gas does not leak. For the connection of the oil pipe screw, the O-ring is usually located on the outside or inside of the screw to ensure the sealing effect. The material of the O-ring should be selected according to the type and temperature of the oil, such as fluororubber, silicone, nitrile rubber, etc.
In order to further improve the sealing performance, multiple sealing designs are sometimes used, such as the combination of metal washers and O-rings to ensure that leakage can still be effectively prevented under extreme conditions.

The surface of the oil pipe screw can be coated, such as galvanizing, nickel plating, coating treatment, etc., to improve its corrosion resistance and wear resistance. In the high temperature and high pressure environment of the oil, the surface treatment can not only enhance the durability of the screw, but also effectively prevent leakage in the threaded part.
For some special applications, such as chemical pipeline systems, screws and threads are often coated with PTFE (polytetrafluoroethylene), which has excellent corrosion resistance and sealing properties, and can effectively prevent oil leakage.

Oil pipe screws need to withstand the long-term effects of oil and chemical media, so the material selection is crucial. Commonly used materials include stainless steel, alloy steel, galvanized steel, etc. These materials have good corrosion resistance and can prevent screw corrosion when oil leaks, thereby affecting the sealing effect.
Under high temperature and high pressure environments, oil pipe screws need to use materials with excellent high temperature and high pressure resistance, such as high temperature resistant alloy steel, titanium alloy, etc. These materials can ensure that the screws maintain stability in harsh working environments and avoid sealing failure.

The tightening force of the screw is crucial to the sealing effect. Overtightening or over-loosening will cause sealing failure. The screws need to be tightened according to the specified torque value. Over-tightening may damage the sealing performance of the sealing gasket or O-ring, while over-loosening cannot form enough pressure, resulting in leakage.
When installing oil pipe screws, using a dedicated torque control tool (such as a torque wrench) can ensure that the tightening force of each screw meets the specification requirements. This ensures the tightness of the screw connection and prevents leakage.

The sealing surface of the screw should be kept as smooth and flat as possible. Rough surfaces or defects such as burrs and cracks may cause the sealing gasket and O-ring to be loose, which in turn leads to leakage. Fine machining and polishing can ensure that the sealing surface is flat and smooth, thereby improving the sealing effect.
In addition to using gaskets and O-rings, the sealing surface of the screw can also be treated with special coatings, such as PTFE coating, to enhance the sealing performance and prevent leakage.

Ensure that the oil pipe screws are installed correctly to avoid leakage caused by improper installation (such as misalignment, over-tightening or loosening). During the installation process, the installation specifications provided by the manufacturer should be followed, and the status of the screws and seals should be checked to ensure correct installation.
The sealing performance of the oil pipe screw connection should be checked regularly, especially under high pressure, high temperature or harsh environment. Check whether the screws have signs of looseness, corrosion, damage, cracks, etc., and replace damaged screws and seals in time to prevent oil leakage.

In some high-demand applications, an intelligent sensor system can be equipped to monitor the sealing status of the oil pipe connection in real time. Sensors can detect parameters such as temperature, pressure, and vibration, detect sealing problems or leakage risks in time, and take repair measures in advance.

In order to ensure that the oil pipe screws can effectively seal and prevent oil leakage when connecting the oil pipe, it is necessary to optimize the thread design, sealing technology, material selection, surface treatment and other aspects. In addition, appropriate installation torque, regular inspection and maintenance, and the use of intelligent monitoring technology can further ensure the long-term sealing performance of the oil pipe screws in high pressure, high temperature, and harsh environments, thereby improving the safety of oil transportation and storage.