According to the manufacturing method, pipes can be welded or rolled. Rolled products can be cold or hot. The shape of the pipes can be round or square. If manufacturing standards are not violated, you can get a high-quality product. Welded pipes are divided into those with a straight seam and those with a spiral weld seam. Where are the pipes used? Square pipes are used in furniture making and agriculture. Round pipes are used to build water and gas supply systems. Pipes have a number of parameters by which they are distinguished. Among them, the main ones are the length and size, the cost of the pipes depends on them. According to the cross section, square and round pipes are distinguished. https://ukrstarline.ua/ru/chernyj-metalloprokat/stalnaya-truba