The connection method of spiral pipes is generally welding because welded pipes are relatively low in cost. Some projects will also use other connection methods such as screw connection, flange connection, socket connection, groove connection, etc. due to factors such as construction period, construction conditions, and geographical environment.

The following is a detailed description of the characteristics of other connection methods:

1: Flange connection: Generally, flange connection is fast and easy to construct, and the tools are simple, but they cannot meet most engineering requirements in terms of safety and sealing. Generally, low-pressure pipelines and pipelines that are often moved are suitable for this connection method, such as mud discharge pipelines, etc.

2: Groove connection: Also known as clamp connection technology, it has become the first technology for connecting liquid and gas pipelines. Although this technology was 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 complex pipeline connection process simple, fast, and convenient. It has taken a big step forward in pipeline connection technology. Grooved pipe fittings include two major categories of products: ① Pipe fittings that play a connecting and sealing role include rigid joints, flexible joints, mechanical tees, and grooved flanges; ② Pipe fittings that play a connecting and transitioning role include elbows, tees, crosses, reducers, blind plates, spiral welded pipes, etc. Grooved pipe fittings that play a connecting and sealing role mainly consist of three parts: sealing rubber rings, clamps, and locking bolts. The rubber sealing ring located in the inner layer is placed on the outside of the connected pipe and matches the pre-rolled groove. Then the clamp is buckled on the outside of the rubber ring and then fastened with two bolts. Because the rubber sealing ring and clamp adopt a unique sealable structural design, the groove connector has good sealing performance, and its sealing performance increases accordingly with the increase of the fluid pressure in the pipe.

Groove connection makes the pipeline connection operation simple, which is conducive to construction safety, good system stability, convenient maintenance, labor saving, and time-saving, so it has good economic benefits. Although the price of a single accessory of the clamp is higher, the comprehensive benefits of the entire pipe network installation are higher than the flange connection.

3: Clamp pipe connection: As an advanced pipe connection method, it can be exposed or buried, with both rigid joints and flexible joints. Therefore, it has a wide range of applications. It can be used in fire water systems, air conditioning hot and cold water systems, water supply systems, petrochemical pipeline systems, thermal power and military pipeline systems, sewage treatment pipeline systems, etc.