1 Hot rolled seamless steel pipes for general requirements (gas pipeline, steam line or seamless black pipe) 2 Hot rolled seamless steel pipes for increased requirements (manifolds and/or pipes for the power engineering industry etc.) 3 Hot rolled creep resisting pipes – boiler tubes (pipes for power plants and heat exchangers) 4 Hot rolled seamless and welded steel pipe with longitudinal weld with dimension suitable for thread cutting 5 Hot rolled seamless and welded steel pipe with longitudinal weld, with dimension suitable for thread cutting 6 Welded steel pipe with longitudinal weld, with dimension suitable for thread cutting (water pipes etc.) 7 Hot rolled and welded steel pipe with longitudinal weld, suitable for cutting 8 Hot rolled seamless steel pipes for special requirements (suitable for welding, with increased strength, medium alloy, suitable for nitriding etc.) 9 Manifold for crude oil production 10 Casing pipe for crude oil production, hot rolled, seamless 11 Welded steel pipe with longitudinal weld, of commercial quality (welded black pipe) 12 Welded steel pipe with longitudinal weld, for increased requirements (welded gas pipeline pipe) 13 Galvanised, hot rolled seamless and welded steel pipe with longitudinal weld 14 Seamless precise steel pipe, cold shaped 15 Cold drawn seamless, creep resistant steel pipe, boiler tube 16 Welded precise steel pipes with, longitudinal weld, cold shaped 17 Calibrated welded precise steel pipes with longitudinal weld 18 Welded steel pipes of square or angular section, cold shaped 19 Cold shaped welded structural steel sections, non-alloy, from fine-grained steels, non-alloy 20 Steel pipe bends (90°and 180), seamless 21 Adapters of steel pipes, seamless 22 Steel flanges 23 Convex bottom of the vessel of basket shape Calculation of tube weight Outside diameter mm Inside diameter mm Length mm Wall thickness mm Density of iron g/cm3 Tube weight kg Calculation of tube lenght Outside diameter mm Inside diameter mm Weight kg Wall thickness mm Density of iron g/cm3 Tube lenght kg