Insulating materials. Industrial rigid round laminated tubes and rods based on thermosetting resins for electrical purposes. Specifications for individual materials. Sheet 2: Round laminated moulded tubes|Composite materials, Rigid pipes, Thickness, Straightness measurement, Thermosetting polymers, Dimensional tolerances, Dissipation factor, Reinforced materials, Industrial, Test specimens, Water absorption, Diameter, Electrical resistance, Electrical insulation, Dielectric strength, Solid electrical insulating materials, Pipes, Cohesion, Density, Bending stress, Designations, Polymers, Moulded materials, Plastics, Compressive strength, Laminates, Breakdown voltage, Electrical equipment, Circular shape, Thermal resistance, Permittivity