Connection Method Of Large Diameter SSAW Steel Pipe

Large diameter SSAW steel pipe is welded by bending the steel strip or steel plate into a tubular shape and is widely used for offshore construction. The common connection method for large diameter spiral steel pipe is welding, but in some projects threaded connection and method are also often used. Orchid connection, socket connection, groove connection and other forms. Next is a detailed introduction to the connection methods of large-diameter SSAW steel pipes.

1. Welding and flange connection

Welding and flange connection are traditional spiral steel pipe connection methods, which are far from meeting 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, electric power pipeline connection.

2. Grooved pipe fittings connection

Grooved pipe fitting connection technology, also known as clamp connection technology, has become the first technology for connecting liquid and gas pipelines. Although the technology developed later in China than abroad, it was quickly accepted by the market due to its advanced technology. The application of grooved pipe connection technology makes the complex pipe connection process simple, fast and convenient. Pipeline technology has taken a giant step forward.

Grooved pipe fittings include two major categories:

①?Pipe fittings that serve as connections and seals include rigid joints, flexible joints, mechanical tees and grooved flanges;

②?Pipe fittings that serve as connections and transitions include elbows, tees, crosses, reducers, blind plates, spiral welded pipes, etc. The grooved connection pipe fittings that serve as connections and seals are mainly composed of three parts: sealing rubber rings, clamps and locking bolts. Place the inner rubber sealing ring on the outside of the connected pipe, fit it into the pre-rolled groove, then tighten it with a clamp on the outside of the rubber ring, and then tighten it with two bolts. Due to the unique sealing structure design of its rubber seal ring and clamp, the groove connection has good sealing performance, and as the fluid pressure in the pipeline increases, its sealing performance also increases accordingly.

The groove connection makes the pipeline connection operation simple, which is beneficial to construction safety, has good system stability, is easy to maintain, saves labor and time, and therefore has good economic benefits. Using clamp connections, although the price of a single clamp component is higher, the overall efficiency of the entire pipe network installation is higher than that of flange connections.

Scope of application:

Liquid and gas pipeline connections.

3. Clamp pipe fittings connection

As an advanced pipe connection method, clamp pipe connections can be surface-mounted or buried, including both steel joints and flexible joints. Therefore, it has a wide range of applications.

According to the system: it can be used in fire water supply 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. According to pipe material

Can be used to connect steel pipes, steel pipes, stainless steel, plastic-lined steel pipes, ductile iron pipes, thick-walled plastic pipes and soft valves to steel pipe joints and flange joints.

Scope of application:

Water pipeline connection, oil and gas pipeline connection, chemical pipeline connection, thermal power and military pipeline connection.

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