Generally speaking, because the cost of anticorrosive steel pipes is relatively low, the connection method of anticorrosive spiral steel pipes is welding. Due to the limitation of construction period, construction conditions, geographical environment and other factors, some projects will also use other connection methods, such as screw connection, flange connection, socket connection, slot connection and so on.

1. Flange connection anticorrosive steel pipe generally has the advantages of fast speed, convenient construction, simple tools, etc., but it cannot meet most engineering requirements in terms of safety and tightness. Generally, low-pressure pipes are suitable for this connection, such as sludge pipes.

2. Grooved anticorrosive steel pipe: Also known as clamp connection technology, it has become the first technology to connect liquid and gas pipelines. Although this technology developed later in China than abroad, it was quickly accepted by the domestic market due to its advanced technology. The application of grooved pipe connection technology makes the complicated pipe connection process simple, fast and convenient. Pipe connection technology is a big step forward. Grooved connectors include two products:

1) rigid joints, flexible joints, mechanical tees and grooved flanges;

2) Elbows, tees, crosses, reducers, blind plates, spiral welded pipes, etc. The grooved connecting pipe fittings for connection and sealing are mainly composed of three parts: a sealing rubber ring, a clamp and a locking bolt. The rubber seal ring on the inner layer is placed outside the connecting pipe and coincides with the pre-rolling groove. Then tighten the clamp on the outside of the rubber ring, and then tighten with two bolts. Due to the special sealing structure design of the rubber sealing ring and the clamp, the groove connection has a good sealing performance. As the fluid pressure in the pipeline increases, its sealing performance also improves accordingly.

The trench connection makes the pipeline connection easy to operate, conducive to construction safety, good system stability, convenient maintenance, saving time and labor, and good economic benefits. When using a clamp connection, although the price of a single piece of the clamp is higher, the overall benefit of the entire pipe network installation is higher than the flange connection.

3. As a kind of advanced anti-corrosion steel pipe connection method, the clamp pipe fittings can be exposed or concealed, that is, steel joints or flexible joints. Therefore, it has broad application prospects. Suitable for firefighting water supply system, air-conditioning hot and cold water system, water supply system, petrochemical pipeline system, thermoelectric military pipeline system, sewage treatment pipeline system, etc.