The spiral welding manufacturing unit on its own has three production lines for the production of steel pipes which allows the factory to produce various dimensions of pipes and production in large capacity. Additionally, the unit for coating of steel pipes is arranged through inner insulation and external insulation. Insulation is done with bitumen lacquer, epoxy resin, color metallic base, or in accordance with customer requirements. The unit for the production of metal constructions includes the assembly of metal construction from steel pipes and profiles (open and closed), manufacture and assembling emergency stairs and various billboards. Additionally, this unit produces reservoirs (horizontal and vertical volume up to 100m³) for water and fuel, as well as other non-standard products.