Spiral knurling on steel pipes, Dnipropetrovsk region.

Spiral knurling on steel pipes A steel pipe is a metal product, without which it is simply impossible to fully build a residential or industrial building. There are a large number of varieties of similar products, so before you buy a steel pipe, you need to decide what parameters it should have and what class it belongs to.

According to the manufacturing method
Depending on the production technology, welded and rolled pipes are distinguished. The latter are made by the method of ingot rolling on specially equipped equipment that leaves a hole of any required shape in the central part of the product. In other words, initially a cast monolith is produced, which is characterized by high strength and unsurpassed wear resistance. The more common steel pipes are those that were made by the welding method, namely:(//tractor-service.com)

straight stitched The steel is heated and rolled in such a way that the seam runs along the entire length of the final product.
Spiral The tape is wound in a spiral, after which the edges of the product are welded.
All of them are distinguished by high strength, reliability and durability, however, they may differ in their technical characteristics depending on the intended field of application.