The connection method used by the spiral steel pipe

Generally speaking, the connection method of spiral steel pipe is welding, because the cost of welded pipe is relatively low, and some projects will also use other connection methods due to factors such as construction period, construction conditions, and geographical environment. Connection, flange connection, socket connection, groove connection, etc.

1: Flange connection Generally, the flange connection speed is fast, construction is convenient, and tools are simple, but in terms of safety and sealing, it cannot meet most engineering requirements. Generally, pipelines with low-pressure and frequently used pipelines are suitable for this connection method. , such as sludge discharge pipes, etc.

2: Groove connection: Also known as clamp connection technology, it has become the first technology for liquid and gas pipeline connections. Although this technology was developed later in China than abroad, due to its advanced technology, it was quickly adopted. received in the domestic market. The application of grooved pipe connection technology makes complex pipe connection procedures simple, fast, and convenient. A big step forward in plumbing technology. Grooved connection pipe fittings include two major categories of products: ①The pipe fittings that play the role of connection and sealing include rigid joints, flexible joints, mechanical tee, and groove flange; ②The pipe fittings that play the role of connection transition include elbows, tee, Cross, reducer, blind plate, spiral welded pipe, etc. The groove connection pipe fittings that play the role of connection and sealing are mainly composed of three parts: sealing rubber ring, clamp, and locking bolt. The rubber sealing ring located on the inner layer is placed on the outside of the connected pipe and is in line with the pre-rolled groove, and then a clamp is fastened on the outside of the rubber ring, and then fastened with two bolts. Due to the unique sealable structure design of the rubber sealing ring and the clamp, the groove connection has good sealing performance, and with the increase of the fluid pressure in the pipe, the sealing performance is correspondingly enhanced. The groove connection makes the pipeline connection simple, which is beneficial to construction safety, good system stability, convenient maintenance, labor saving, and time-saving, so it has good economic benefits. With a clamp connection, although the price of a single part of the clamp is higher, the overall benefit of the entire pipe network installation is higher than that of a flange connection.

3: As an advanced pipe connection method, clamp pipe fittings can be either exposed or buried, including rigid joints and flexible joints. Therefore, it has a broad scope of application. It can be used in fire water systems, air conditioning cold and hot water systems, water supply systems, petrochemical pipeline systems, thermal power, military pipeline system, sewage treatment pipeline system, etc.