Spiral Welded Pipes

Spiral welded pipes are produced from coils of steel that are unwound and flattened. The flattened strip is formed by angled rollers into a cylinder of the desired diameter. At the end of the coil, a new coil is butt-welded to the trailing edge of the pipe, forming a cross seam.

Spiral Welded Steel Pipes

A G Universal Limited is a supplier and manufacturer of high quality Spiral Welded Steel Pipes in India. We manufacture Spiral Welded Pipes in different sizes, grades and specification as per international guidelines as we also export our products in many countries. Spiral welded pipes are manufactured from coils of steel which are unwound and flattened. The flattened strip is formed by angled rollers into a cylinder of the desired diameter. Spiral welded pipes are available in sizes from 24 inches to 144 inches.

Spiral welded pipes are also known as helical welded pipes. They are mainly used for water distribution service. They are used in many types of industries such as tap water engineering, chemical industry, electric power industry, petrochemical industry, agricultural irrigation and construction.

Like ERW pipe, spiral welded pipe is also manufactured from steel coil but the only difference is that the coil is wound at an angle, so the weld runs around the outside of the pipe in the shape of a helix. Spiral welded pipes are also known as helical welded pipes. The manufacturing process of spiral welded pipe is one of the most cost-effective ways to produce steel pipes. It typically utilises a helical Double Submerged Arc Weld (DSAW), which is protected against outside contaminants in the air, thus keeping the welded steel purified. Our mill produces a wide range of pipe diameters and wall thicknesses.

Various steps in manufacturing process of a spiral welded pipe are:

1. First of all upon receipt of a coil, it is placed on a horizontal Un-coiler Mandrel and fed into the Straightener.
2. Then, the steel strip of coil is introduced into the flattener through a roll stand and the coil set is removed.
3. During movement through the straightener, the leading and trailing edges of the strip are trimmed in preparation for butt welding.
4. The edges of the coil are trimmed with carbide teeth to prepare for welding.
5. Then, the strip of coil enters the three roll apparatus composed of lead, buttress and mandrel roll sets. Now, the coil starts to form the spiral shape that will then become pipe.
6. Using a submerged arc welding process, the welding system welds the pipe, first along the inside diameter and then along the outside diameter.
7. Once the welding is complete, the finished pipe is visually inspected by Quality Control (QC)
8. Once the pipe reaches the desired length, the cut-off machine is engaged.

There are many advantages of spiral welded pipes as described below:

• The equipment used in manufacturing is light in weight.
• The cost of production has a lower initial investment.
• The welded tubes can be directly presented at the installation site where the pipeline is to be set.
• Spiral welded pipe puts less stress on the seam than its straight seam counterpart, thus allowing it to withstand more pressure.
• It is more flexible and customizable, thus allowing for larger diameters and longer lengths with varying levels.