There are the following subcategories: Square pipes, rectangular pipesand round pipes. Their abbreviations are Tvpt, TvdrandTvr.
Common steel grades: S235/355(JR)(JO)(J2)
Sizes: Rectangular pipes: 15x15x1.5 – 400x400x12.5 / Round pipes: 18x1.5 – 219x12.5
Scope of application: Steel products and steel structures, different types of frames, scaffolding, undercarriages, supports, gates, fences, sliding gates, masts, protections