The front card pipe fitting usually refers to the parts that play the main sealing role in the card sleeve pipe joint, which is an important part of the card sleeve pipe joint. 

 Structural characteristics: 

 The front card sleeve is generally table-shaped, including the small end and the large end. Its outer wall has a certain angle with the axis, usually 15°-25°, and the angle between the inner wall of the large end and the axis is generally 40°-60°. This structural design allows the front card sleeve to form a good sealing match with the joint body and pipe fittings after assembly. 

 Working principle: 

 The sleeve pipe joint is composed of the joint body, the front sleeve, the rear sleeve and the nut. When the sleeve and nut sleeve are inserted into the joint body on the steel pipe, when the nut is tightened, the rear sleeve will push the front sleeve along the axial direction, and at the same time exert a squeezing force on the pipe fittings along the radial direction, so that the front side of the front side of the front sleeve fits with the conical surface of the joint, and the inner blade evenly bites into the seamless steel pipe to form an effective seal. The front card sleeve is mainly used to seal the connection with the connector body and the outer diameter of the card sleeve. 

 Materials and specifications: 

 The materials of pre-manufacturing card pipe fittings are usually 304, 316, 20# steel, etc. In terms of specifications, the piping range is generally Φ4-Φ42 ordinary precision seamless steel pipes, and the specific specifications of different manufacturers may vary. 

 Performance advantages: 

 The front card pipe fittings are used together with the rear card pipe fittings, which have excellent gas sealing and card sleeve grip, good vibration fatigue resistance, can provide good support for the card sleeve, and are easy to install correctly.

Each process, each facility, and each environmental constraint has its own special requirements. Therefore, Dongyan offers a comprehensive range of products covering different performance levels, pressures, different functions and different materials.