ISO 13953 pdf download

ISO 13953 pdf download.Polyethylene (PE) pipes and fittings — Determination of the tensile strength and failure mode of test pieces from a butt-fused joint 1 Scope This International Standard describes a test method for determination of the tensile strength and tensile failure mode of butt-fused polyethylene (PE) pipe assemblies. The method is applicable to butt-fused joints between PE pipes with a nominal outside diameter of not less than . The method may be used, together with other test methods, to evaluate the quality of the butt-fused joints. 2 Normative reference The following normative document contains provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the normative document indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 1 1 41 4:1 996, Plastics pipes and fittings — Preparation of polyethylene (PE) pipe/pipe or pipe/fitting test piece assemblies by butt fusion . 3 Principle A test piece machined from a butt-fused PE pipe joint to give a waisted section is subjected to a tensile stress at constant speed. When loading the test piece in a tensile-testing machine, the stress is concentrated through the jointed region and ultimate failure is in the vicinity of the joint. The failure mode and tensile strength are used as criteria for the evaluation of the butt-fused joint. 4 Apparatus 4.1 Room, which can be controlled at a temperature of . 4.2 Tensile-testing machine, capable of sustaining between its clamping jaws a constant speed of , and equipped with means for recording the consequent applied force, and a device to detect test piece failure. 4.3 Clamping device, equipped with bars fitting into traction holes machined in the test piece. 4.4 Measuring devices, capable of determining the width and thickness of the test piece to within (see 7.1 ). 4.5 Template with the geometry of the test piece (see Figures 1 and 2), to mark the shape of the test piece to be machined. 5 Test pieces 5.1 Sampling The pipes used to produce the test piece shall be obtained by sampling as specified in the product standard....