ISO/TC 138/SC 5/WG 22 - Thermoplastics pipes for the transport of fluids

This document specifies the values or options chosen for the test parameters (i.e. the impact energy, specimen dimensions, specimen type, specimen supports and test temperature) for both unnotched and notched specimens, for testing the impact resistance (pendulum method) of thermoplastics pipes of the following materials, in accordance with ISO 9854-1. It applies to pipes made of unplasticized poly(vinyl chloride) (PVC-U), high-impact poly(vinyl chloride) (PVC-HI), oriented unplasticized poly(vinyl chloride) (PVC-O), chlorinated poly(vinyl chloride) (PVC-C), acrylonitrile/butadiene/styrene (ABS), acrylonitrile/styrene/acrylate (ASA), propylene homopolymer (PP-H), propylene impact polymer (PP-B), propylene random copolymer (PP-R), propylene random copolymer with modified crystallinity (PP-RCT), and polyethylene (PE).

This document specifies two general test methods, Method A and Method B, to be used for the determination of the impact properties of unnotched and notched specimens cut from thermoplastics pipes for the transport of fluids. — Method A: unnotched method, for unnotched specimens cut from thermoplastics pipes for the transport of fluids. — Method B: notched method, for specimens cut from thermoplastics pipes for the transport of fluids, into which a notch has been machined. The use of Method A or Method B is determined by the relevant product standards. This document is not intended as a reference test method for the determination of the impact strength of pipes. ISO 3127, relating to the determination of the impact strength of pipes by means of a falling mass, is the reference test method. However, this document can be used for scientific research, materials testing or the examination of pipe when it is not possible to take measurements in accordance with the reference method. This document can be applied to either isolated batches or continuous production of pipe.