large steel wire pipeThere are many kinds of connection, the mainstream compression type, ring pressure type, flange connection, groove connection, welding connection and taper thread connection. Each method has its own advantages and disadvantages, and it is necessary to find a suitable method according to the actual situation.

1. Crimping connection

The principle of connecting large steel wire pipes in this method is to clamp the stainless steel pipe on the pipe with hydraulic tongs, and at the same time use an O-ring to stop the water, so as to achieve the effect of connection. Although this method is convenient to operate, the pipe wall is very thin, and the connection strength is only about 1/3 of the pipe body strength. The tube cannot be removed. If the burr and flash of the stainless steel pipe mouth are not cleaned, it is easy to damage the rubber ring and water leakage.

2. Ring press connecting rod

The principle of ring pressure connection is to clamp the stainless steel pipe on the pipe with hydraulic pliers, and use a wide band rubber sealing ring to stop water to achieve a good connection effect. Since this method has one more pressure pit than the compression type, the connection strength is slightly stronger than the compression type. In addition, the pressure pit is annular, the pipeline is easy to rotate, affecting the overall sealing effect.

3. Flange connection

The principle of the flange connection method for large steel wire pipes is to connect the two connectors and the flange with fastening bolts, and then seal with a flat sealing plate to achieve the corresponding connection effect. The advantage is that the connection strength is high and stable, and the installation is convenient and detachable. The disadvantage is that the flange is costly.

4. Groove connection

　　large steel wire pipeThe principle of this method is to tighten the pipe fittings with nuts, axially compress the stainless steel pipe and the pipe fittings with a convex ring, and then use a tapered sealing ring to stop water to achieve the connection effect. The advantage is that it can be disassembled, but the disadvantage is that the process of rolling the concave ring at the pipe end is increased during the installation process. Casting fixtures are expensive and cannot be used for negative pressure pipes.

5. Welding connection

The connection principle of this method is to directly weld two connectors through a hot melt process to achieve connection. The advantage is that the connection strength is high, the disadvantage is that the weld gas protection of the field welded joint is difficult to meet the standard, the weld is easy to rust, and the service life of the pipeline is reduced. The installation quality largely depends on the technical level of the welder, so the quality stability is not stable. High.

6. Taper thread connection

The principle of connecting large steel wire pipes in this method is to directly tighten the stainless steel pipes, tighten the two joints of the inner and outer interfaces with tapered pipe threads, and use the pressure of the connecting threads to achieve a sealing effect to complete the connection. The advantages are convenient disassembly, the strength of the connected mouth reaches the strength of the pipe body, the installation is convenient and simple, the quality is reliable and stable, the pipe fittings are thinner, and the cost is lower. In addition, if the external thread interface is wound on PTFE tape, if liquid raw material tape is used, it needs to be added, which can basically ensure that the interface does not leak for a long time.

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