Threaded connection seamless steel pipe

Seamless steel pipe is a kind of pipe material that is made of steel ingot or solid tube blank through perforation to form a capillary tube, and then processed through diameter expansion, cold drawing or hot rolling, cold spinning and other processes. So what is a wire-connected seamless steel pipe?

Seamless steel pipe threading is used to connect steel pipes by using special hydraulic tools to thread the openings of the steel pipes. The wire-coating process brings close contact between the steel pipe and the main pipe to ensure the sealing and tightness of the seamless pipe connection.

1. Tools used: special hydraulic tools, wrenches (screwdrivers)

2. Operation steps

(1) Weld the welding ring on the pipe and polish it smooth. Before installation, clean the inner wall of the pipe and remove rust; then put the pipe into the ditch or pit;

(2) Align the joint end of the special hydraulic tool with the center of the pipe mouth and press the pipe hard to deform it; then use a wrench to tighten the joint nut to complete the connection.

3. Precautions for connecting steel pipes with seamless pipe wires

(1) In order to prevent damage to the galvanized layer and protect the thread surface from damage, oxidation corrosion and other defects, this operation should be performed after the piping system is fully installed. If the piping system has not been installed yet, this operation cannot be carried out forcefully. (Note: If the construction site conditions permit, this operation can be performed after the installation is completed).

(2) When performing this work, a certain degree of strength and uniform pressure must be maintained and neither too loose nor too hard. (Be careful not to damage the galvanized layer on the thread surface), otherwise it will directly affect the strength and service life of the joint!

(3) Since this process is a pressure operation, it must be safely supervised by professionals before construction!

4. Advantages of wire-coated seamless pipes

(1) The tensile strength is high, generally above 600 MPa, so the ability to withstand pressure is also greatly enhanced. This type is widely used in many important engineering and construction fields, such as bridges, high-rise buildings and high-voltage transmission towers. pipeline.

(2) It is not easy to corrode because its material is carbon steel, and ordinary steel contains a certain amount of sulfur and oxygen, so it is prone to oxidation reactions. The carbon element has acid resistance and oxidation resistance, so this kind of pipe is not prone to rust.

(3) Long service life. Because the inner wall of this type of pipe is very smooth, its friction resistance is small, and it will not be affected by the external environment, so there will be no wear and tear during use, thus ensuring its service life. longer, thus reducing maintenance costs.

(4) It has strong plasticity. Since it is a pipe produced by extrusion, it is easy to achieve mechanization and automation during processing, and the production efficiency is high. At the same time, its surface is relatively smooth and can be easily installed using a variety of different connection methods.

(5) Easy to construct, because it does not need to go through tedious on-site construction operations like ordinary welded pipes. Instead, they can be directly installed in the construction ditch and used, which can save a lot of time.

Article source: https://article-realm.com/article/Business/52573-Threaded-connection-seamless-steel-pipe.html