• The joint body is usually made of materials such as ductile iron, brass, or stainless steel. These materials possess excellent pressure resistance, corrosion resistance, and mechanical strength, enabling adaptation to the usage requirements of different media and environments.
• The connection ports at both ends of the body are processed to standard dimensions, with the inner diameter precisely matching the outer diameter of Type 65 pipes. The inner walls of the ports undergo precision machining to ensure tight fit with the outer walls of the pipes.
• Seals are the core components ensuring the joint’s sealing performance, mostly made of elastic materials like nitrile rubber or fluororubber. Seals of different materials are selected based on the properties of the conveyed medium (e.g., temperature, corrosiveness) to effectively prevent fluid leakage.
• Fastening parts include flanges, bolts, nuts, or clamps, which are used to firmly connect the joint to pipes or equipment, ensuring the stability of the connection part.

Design Features

• Standardized dimensions: It complies with relevant industry standards (such as GB/T or ISO standards), ensuring good interchangeability between Type 65 pipes and joints produced by different manufacturers, and reducing the difficulty of selection and replacement.
• Optimized structural strength: The structural strength of the joint body is optimized to withstand high working pressure, with a general applicable pressure range of 1.6MPa to 6.4MPa, meeting the pressure requirements of most industrial and civil pipeline systems.
• Multi-seal structure: In addition to the main seal, some joints are equipped with auxiliary sealing rings to further improve sealing reliability. Even under working conditions with vibration or pressure fluctuations, leakage can be effectively prevented.
• Detachable structure (for some models): Some Type 65 Single Joints are designed with a detachable structure, facilitating installation, maintenance, and replacement, and reducing the downtime of the pipeline system.

Working Principle

• During installation, the pipe is inserted into the joint’s connection port, making the outer wall of the pipe closely contact the inner wall of the joint. The seal is compressed between the pipe and the joint, forming the first sealing barrier to prevent fluid leakage from the gap.
• Appropriate pre-tightening force is applied through fastening parts to firmly connect the joint and the pipe, eliminating gaps at the connection part and further compressing the seal to enhance the sealing effect.
• When the pipeline system is in operation, fluid pressure acts on the seal, increasing the pressure between the seal and the contact surface to form a self-tightening seal. The higher the pressure, the more reliable the sealing effect. This self-tightening feature ensures the sealing stability of the joint under different working pressures.

Application Scenarios

• Industrial pipeline systems: It is often used in liquid or gas transmission pipelines in industries such as chemical engineering, petroleum, and metallurgy to connect equipment (e.g., water pumps, valves, heat exchangers) to the main pipeline. Its good corrosion resistance and pressure resistance allow it to adapt to the complex properties of industrial media.
• Municipal water supply and drainage systems: In the laying and maintenance of urban water supply pipelines and sewage treatment pipelines, the Type 65 Single Joint is used to connect pipes in different sections or link pipes to facilities such as water meters and valves, ensuring smooth water supply and drainage.
• HVAC systems: It is used for connecting air-conditioning water pipes and heating pipelines. Its excellent sealing performance and pressure resistance ensure efficient transmission of cold and hot media, reducing energy loss.
• Agricultural irrigation systems: In the laying of field irrigation pipelines, the Type 65 Single Joint can adapt to outdoor environments, enabling convenient connection and ensuring stable transmission of irrigation water.

Installation and Maintenance

Installation Requirements

• Before installation, check whether the connection ports of the joint and pipe are intact (free of scratches, deformation, or other defects), and clean impurities and oil stains on the port surface to ensure the sealing surface is clean.
• Ensure the coaxiality of the pipe and joint during installation; avoid forced installation to prevent deformation of the joint or pipe, which may affect the sealing effect.
• Apply pre-tightening force evenly to fastening parts; avoid over-tightening or under-tightening. Over-tightening may damage the joint or seal, while under-tightening will affect sealing performance.

Routine Maintenance

• Regularly check whether there are signs of leakage at the joint connection part; if leakage is found, fasten the parts or replace the seal in a timely manner.
• For long-term operating systems, replace seals regularly according to usage conditions to prevent seal failure due to aging.
• During pipeline system maintenance, follow the correct disassembly sequence to avoid damaging the joint and pipe.

Quality Standards

• Material requirements: The chemical composition and mechanical properties of the joint body material must comply with standard regulations, and verification through material test reports is required.
• Dimensional accuracy requirements: The tolerances of key dimensions (e.g., inner diameter, outer diameter, wall thickness) of the connection port must be controlled within the standard range, and detection using precision measuring tools is required.
• Sealing performance requirements: Sealing performance must be verified through pressure tests; no leakage is allowed at the joint under the specified test pressure.
• Other tests: In addition, pressure resistance tests and corrosion resistance tests are required to ensure the reliable operation of the joint under various working conditions.