Spiral corrugated pipe

Spiral pipe is one of the production methods of steel pipe. In fact, this pipe is made of steel and has a special shape of steel pipes. Spiral pipes are supplied in a spiral shape and are produced in different thicknesses. Spiral pipes are rolled and come in sizes from 5 to 120 inches.

Features of spiral corrugated pipe

Spiral pipe is most used in oil and gas industry. These steel pipes are produced with a high degree of flexibility and are a good option for use in various industries. Its special features such as uniformity of dimensions, good mobility, high flexibility, excellent strength and شناس are known. The use of spiral pipes is cost-effective in every way. Therefore, it is recommended for use in various industries. Today, spiral pipes are widely used in the oil and gas industry. Therefore, it is very important to obtain information and research on its performance. In fact, by recognizing the advantages and disadvantages of spiral pipes, one can have convincing and reasonable expectations from spiral pipes.

Background of spiral pipes

The history of spiral pipes can provide us with sufficient and comprehensive information about the manufacture and production of spiral pipes. Quality spiral steel pipe was produced in the mid-1960s. Before 1960, we also saw spiral products, but these pipes were not of the desired quality. The increase in quality production of spiral steel pipe coincided with the increase in pipe production in the world. The oil and gas industry needs transmission pipes to carry out processes and transfer materials. Today, in many parts of the world, spiral pipes are used to transport oil and gas. The development of spiral pipes in the oil and gas industry shows that these pipes are equal in strength to direct welded seam pipes and can be a good option for replacement. In the production of spiral, much attention has been paid to its quality. In fact, these pipes are produced according to international standards.

The advantage of using a spiral tube

Spiral pipes have high mechanical and motor properties. Therefore, they are a good option for use in the oil and gas industry. The spiral tube is produced with the same dimensions and has a good uniformity. Pipe uniformity is an important parameter in the oil and gas industry. They are affordable options and can save money. Sometimes we may need to bend during installation. Spiral pipe has the ability to bend and can meet the needs of industries. Spiral pipes for production and construction are affected by various factors such as welding and rolling of sheets, and this increases their resistance to various conditions and stresses. These pipes have good resistance and strength against breakage and cracking. The production and manufacturing process of the spiral is done by maintaining the flexibility of the pipe. In fact, pipes of different diameters can be produced from a sheet of fixed width. Sheets of different widths can also be used to produce pipes of the same diameter.

Production methods of spiral corrugated pipe

Different methods are used to produce spiral steel pipes. In this method, the steel plates are placed between several rollers. Placing between several rollers creates the necessary curvature in the plates. Then the final seam of the spiral steel pipe is welded. Pyramid rolling or roller bending can be practical methods for making spiral pipes. The O&U method is used to produce spiral steel pipe. The steel plates used to make the spiral are U-shaped and then appear O-shaped in the production process. The C&O method is very similar to the U&O method. The only difference between the two is that in the C&O method, more bending is done on the screen. In the spiral forming method, the steel sheet encloses a screw like a thread and eventually forms a tube. Welding is used to fill and connect the edges of the sheet. In the process of making direct welded seam pipes, a machine is used to produce the pipe. In this way, the metal sheet is transferred to the machine to become a pipe. The angle between the pipe and the axes of the tape is used to make spiral welded pipes or spiral pipes. The angle formed between the axes of the strip and the tube is called the forming or inlet angle. In method C2, welding between two halves of the pipe is considered. These semi-tubes are initially produced in a C shape. This is why this method is called the C2 method.

Welding of spiral pipes

Submerged arc method is used for spiral pipe welding. Submerged arc welding has principles and rules. These principles and rules were first considered in 1892. The principles of submerged arc welding were laid by Slavianov. The arc welding method is performed under a layer with the intervention of granular smelters. Sub-powder arc welding machine and sub-layered arc welding method were invented in 1927. In the sub-powder arc welding process, the method of hiding the welding with special powder or flux coating is used. This prevents oxygen from entering the arc and oxidizing the weld. Welding is done to make and produce a spiral steel pipe on both sides of the steel pipe (inside and outside the pipe). In general, the points that are welded in the spiral tube are about 180 degrees apart in terms of location. By performing sub-powder arc welding, we see significant residues that are obtained from welding on the pipe. Submerged arc welding shows significant residues even after hydrotest and cold operation. The results of research show that the welding residues in the spiral tube after hydrotest operation also changed by 40 to 80%.