The plastic armored empty pipe is particularly suitable for laying concrete (rammed and vibrated concrete) and is used when high temperatures are involved. Technical data: highly slippery inner layer, compressive strength: 750 N/5 cm, impact strength: medium, 2.0 kg/100 mm, DIN EN 61386-1 (VDE0605-1), DIN EN61386-22 (VDE0605-22) and DIN EN 60423, flame-retardant, self-extinguishing and corrosion-resistant, classification 33332
