Manufacture of tubes, pipes, hollow profiles and related fittings, of steel (PKD 24.20.Z)

• production of seamless tubes and pipes with circular or non-circular cross-sections, obtained from semi-finished products with circular cross-section, for further processing by hot rolling, hot extrusion or another hot-working process, or from semi-finished products, which may be billets or blooms, obtained by hot rolling or continuous casting,
• production of seamless precision and non-precision tubes and pipes, obtained from hot-rolled or hot-extruded semi-finished products further processed by cold drawing or cold rolling of tubes and pipes with circular cross-section, as well as by cold drawing only of tubes and pipes with non-circular cross-section and hollow profiles,
• production of welded tubes and pipes with an external diameter exceeding 406.4 mm, cold-formed from hot-rolled flat products and welded longitudinally or spirally, including closed sections,
• production of welded tubes and pipes with an external diameter of 406.4 mm or less, with circular cross-section, by continuous cold or hot forming of rolled sheets and flat-rolled products, cold-rolled or hot-rolled products, cold-rolled and welded longitudinally or spirally, as well as with non-circular cross-section by cold or hot forming from cold-rolled or hot-rolled strips, welded longitudinally, including closed sections,
• production of welded, precision tubes and pipes with an external diameter of 406.4 mm or less, by cold or hot forming of cold-rolled or hot-rolled strips and welded longitudinally, as well as delivered as welded or further processed by cold drawing, cold rolling or shape forming of tubes and pipes with non-circular cross-section,
• production of flat flanges and flanges with forged rings by processing hot-rolled steel flat products,
• production of butt-welded fittings (for example elbows and reducers), by forging hot-rolled seamless steel tubes,
• production of threaded components and other steel pipe fittings.

• production of seamless tubes and pipes, of centrifugally cast steel, classified in 24.52.Z.

This group includes the manufacture of other products by cold working of steel.