pipe with a peelable, contiguous thermoplastic additional layer on the outside of the pipe

pipe with smooth internal and external surface, having co-extruded layers on either or both the outside and inside of the pipe, where all layers have the same MRS rating

clearly defined homogenous mixture of base polymer with additives, e.g. antioxidants, pigments, stabilizers and others, at a dosage level necessary for the processing and intended use of the final product

pipe with smooth internal and external surface, extruded from the same compound formulation (3.1) throughout the wall

difference between the measured maximum and the measured minimum outside diameter in the same cross-sectional plane of the pipe