Three types of connection of spiral welded steel pipe

The connection of spiral steel pipe is mainly divided into three kinds.

1: Flange connection:

General flange connection is fast, convenient construction, simple tools, but in terms of safety, sealing can not meet most of the project requirements, the general pressure of low-pressure pipeline, often move the use of the pipeline is suitable for this type of connection, such as mud drainage pipeline, etc.

2: Trench connection:

Also known as clamp connection technology, has become the current liquid, gas pipeline connection of the first technology, although the development of this technology in the country later than abroad, but because of its advanced technology, quickly accepted by the domestic market. Groove fittings connection technology, so that the complex pipeline connection process has become simple, fast and convenient. Make the pipe connection technology a big step forward.

Groove connection fittings include two categories of products: ① connection sealing fittings with rigid joints, flexible joints, mechanical tee and grooved flange; ② connection transition fittings with elbows, tees, crosses, reducers, blinds, spiral welded pipe and so on. Connect the sealing role of the groove connection fittings are mainly composed of three parts: sealing rubber ring, clamps and locking bolts. Located in the inner layer of the rubber sealing ring is placed on the outside of the pipe being connected, and with the pre-rolled grooves coincide, and then in the rubber ring on the outside of the clamp, and then fastened with two bolts can be. Because of its rubber sealing ring and clamp with a unique sealing structure design, so that the groove connectors have a good sealing, and with the increase in fluid pressure in the pipe, its sealing is enhanced accordingly.

3: Clamp fittings connection:

As an advanced pipeline connection, it can be installed openly or buried, i.e. there are steel joints and flexible joints. Therefore, it has a wide range of application. It can be used in fire fighting water system, air conditioning hot and cold water system, water supply system, petrochemical piping system, thermoelectric and military piping system, sewage treatment piping system and so on.

The connection characteristics of spiral steel pipe, groove connection makes the pipe connection operation simple, conducive to construction safety, good system stability, easy maintenance, labor-saving and time-saving, so it has good economic benefits. The use of clamp connection, although the price of individual fittings of the clamp is higher, but the comprehensive benefit of the whole pipe network installation is higher than the flange connection.