The difference between double-card compression pipe fittings and single-card compression pipe fittin

The main differences between double-card compression pipe fittings and single-card compression pipe fittings lie in aspects such as structure, sealing performance, applicable scenarios, and advantages and disadvantages. Please provide the text you would like translated.

Structural differences:

1) Single compression fitting: A single compression fitting has only one compression ring, and the pipes are connected together through the rubber gasket of the compression ring.

2) Double compression fitting: A double compression fitting has two compression rings, and the pipes are connected together through the rubber gaskets of the two compression rings. 

1) Single compression fitting: The sealing performance of single compression fittings is relatively poor. They are prone to leakage under high temperature and high pressure conditions. Additionally, the single-sided sealing ring of single compression fittings is subject to uneven force, which can cause deformation or extrusion of the sealing ring, affecting the sealing performance.

2) Double compression fitting: Double compression fittings have better sealing performance. They use double compression rings and rubber gaskets, ensuring even force distribution on the sealing ring, which is less likely to deform and can maintain airtightness. The double compression design keeps the sealing ring from coming into contact with water, significantly improving durability. Moreover, the sealing ring is evenly compressed from both sides, preventing it from being extruded by water pressure from the side. 

Application scenarios differences:

1) Single-card compression fittings: Suitable for low-pressure, low-temperature, and general environment pipe connections, such as municipal water supply and drainage, industrial pipelines, etc.

2) Double-card compression fittings: Suitable for high-pressure, high-temperature, and special environment pipe connections, such as petrochemical, nuclear power plants, ships, etc. Double-card compression fittings are particularly suitable for high-rise buildings with high water pressure, featuring strong anti-pull-out ability, earthquake resistance, and better resistance to water hammer impact. 

Advantages and Disadvantages Comparison

I. Single-Card Compression Fittings:

1) Advantages: Simple connection method, easy operation, and fast connection speed.

2) Disadvantages: Poor sealing performance, prone to leakage, especially in high-temperature and high-pressure environments. 

II. Double-pressed Fittings:

1) Advantages: Good sealing performance, strong resistance to pull-out (1.8 times higher than single-pressed), excellent seismic and water hammer resistance, suitable for high-rise buildings and high water pressure structures.

2) Disadvantages: Complex structure, relatively cumbersome operation.