1. Press-type connection

It is divided into single press-type and double press-type. Double press type is the most stable connection method. The pipe fittings are clamped on the pipe by radial contraction external force (hydraulic clamp), and the connection effect is achieved through the water stop of the O-ring. It is easy to operate, has good sealing, and cannot be disassembled.

2. Expanding ring connection

The pipe fittings are clamped on the pipe by radial contraction external force (hydraulic clamp), and the connection effect is achieved through the water stop of the wide band rubber sealing ring. It is removable, and the pipe installation adds the process of rolling a convex ring on the pipe end; the sealing is general, and the cost of cast pipe fittings is high.

3. Welding connection

The hot melt process welds the two connectors to achieve the connection effect. The connection strength is high, and the gas protection of the weld seam of the on-site welding port is difficult to meet the standard, causing the weld seam to rust easily, which directly reduces the service life of the pipeline; the installation quality is highly dependent on the technology of the welding workers, and the quality is difficult to stabilize.

4. Self-locking connection

It was first used for small-diameter plastic hose connections, which can be installed quickly without using tools. The inside of the interface is prone to loosening and leaking, and the sealing is poor.

The connection methods for stainless steel water pipes include compression connection, expansion ring connection, welding connection, and self-locking connection.

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