ISO INTERNATIONAL STANDARD 13802 Second edition 2015-06-01 Plastics Verification of pendulum impact-testing machines - Charpy, Izod and tensile impact-testing Plastiques - Verification des machines d'essai de choc pendulaire - Essais de choc Charpy, Izod et de choc-traction Reference number ISO 13802:2015(E) SO International Organization for Standardization @ IS0 2015 ng Institute of Standardization 5956617 vided by IHS under ted without license from IHS IS0 13802:2015(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2015, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISOcopyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org Intenatinair ganization for Standardization Not for Resale, 2015/8/7 05:32:50 etworking permitted without license from IHS IS0 13802:2015(E) Contents Page Foreword ..V 1 Scope ..1 2 Normative references 3 Terms and definitions 4 Measurement instruments. 5 Description of a pendulum impact-testing machine 5.1 Types of pendulum impact-testing machines. ..4 5.2 Testing machine components. 5.2.1 Machine frame - The base of the machine and the structure supporting thependulum 5.2.2 Pendulum 4 5.2.3 Test specimen anvils, supports, clamps and/or holders 5.2.4 Indicating equipment for absorbed energy (e.g. scale and friction pointer orelectronicreadoutdevice) .5 6 Procedure for verification and inspection of a pendulum impact-testing machine 6.1 Certification of machine design and manufacturer. .5 6.2 Field verification of the machine frame shall consist of determining the following items (see Table 4). .6 6.2.1 Installation .6 6.2.2 Levelness 6.2.3 Axial play of the pendulum bearings .6 6.2.4 Radial play of the pendulum bearings 6.2.5 Mechanism for holding and releasing the pendulum .6 6.2.6 Free hanging position 6.2.7 Contact between specimen and striking edge (Izod/Charpy) .6 6.2.8 Potential energy, E .7 6.2.9 Pendulum length, Lp .8 6.2.10 Impact length, L .9 6.2.11 Velocity of the pendulum at instant of impact, V, .9 6.3 Charpy testing machines .10 6.4 Izod testing machines. .11 6.4.1 Line of contact of the striker. ..11 6.4.4 Location of specimen and striker ..12 6.4.5 Vicefaces .12 6.5 Tensile impact testing machines (see IS0 8256) ..12 6.5.1 Specimen clamps for tensile impact test machines. ..12 6.5.2 Ciamps for tensile impact testing .13 6.5.3 Alignment. .13 6.5.4 Mass of crosshead. .13 6.6 Energy indicating system. ..13 6.6.1 Types of scale. ..13 6.6.2 Verification of analogue indicating equipment shall consist of the following examinations ..13 6.6.3 Errorin theindicated absorbed energy,Wi.on analogue indicating systems ...14 6.6.4 Verification of digital indicating equipment shall ensure that the following requirementsaremet ..14 6.7 Losses due to friction ..15 6.7.1 Types of loss. .15 6.7.2 Determination ofthe loss due tofriction in thepointer ..15 6.7.3 Determination of losses due to air resistance and friction in the pendulumbearings ..15 6.7.4 Calculation of the total energy lost due to friction ..15 Intemaional oganzation @sSa5 - All rights reserved iii nsee=Zhejiang Institute of Standardization 5956617 ed without license from IHS Not for Resale, 2015/8/7 05:32:5C