Three connection methods of large-diameter spiral steel pipes

Welding, flange connection:
Welding and flange connections belong to the traditional spiral steel pipe connection methods, which are far from meeting the market demand in terms of safety, sealing performance, cost space, and emergency repair efficiency. Scope of application: water pipeline connection, oil and gas pipeline connection, chemical pipeline connection, power pipeline connection

Grooved Fitting Connections
Groove pipe connection technology, also known as clamp connection technology, 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 by domestic companies. accepted by the market. The application of grooved pipe fittings connection technology makes the complex pipeline connection process simple, fast, and convenient. The pipeline connection technology has taken a big step forward. 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 tees, and grooved flanges; ②The pipe fittings that play the role of connection transition include elbows, tees, Cross, reducer, blind plate, spiral welded pipe, etc. The grooved connection pipe fittings used for connection and sealing are mainly composed of three parts: sealing rubber ring, clamp, and locking bolt. The rubber sealing ring on the inner layer is placed on the outside of the pipe to be connected and matches the pre-rolled groove, then buckle the clamp on the outside of the rubber ring, and then fasten with two bolts. Due to the unique sealable structural design of the rubber sealing ring and the hoop, the grooved joint has good sealing performance, and the sealing performance is enhanced correspondingly with the increase of the fluid pressure in the pipe. The groove connection makes the pipeline connection operation simple, which is conducive to construction safety, good system stability, convenient maintenance, labor and time saving, and thus has good economic benefits. With the clamp connection, although the price of a single piece of the clamp is relatively high, the comprehensive benefits of the installation of the entire pipe network are higher than that of the flange connection. Scope of application: liquid, gas pipeline connection

Clamp pipe connection
As an advanced pipeline connection method, the clamp pipe fitting connection can be either exposed or buried, with both rigid joints and flexible joints. Therefore, it has a wide range of applications. According to the system: it can be used in fire water systems, air conditioning hot and cold water systems, water supply systems, petrochemical pipeline systems, thermal power, military pipeline system, sewage treatment pipeline system, etc. According to the pipe material: it can be used to connect steel pipes, steel pipes, stainless steel, plastic-lined steel pipes, ductile iron pipes, thick-walled plastic pipes, and soft and valve parts with steel pipe joints and flange joints. Scope of application: water pipeline connection, oil, and natural gas pipeline connection, chemical pipeline connection, thermal power, and military pipeline connection