Develop discard criteria for non-spin wire ropes

Abstract

The initial project objective was to correlate the level of internal broken wire indications, obtained using a magnetic rope test instrument, with rope strength loss and then to propose a given indication level at which non-spin ropes are to be discarded. No experimental data became available during the course of the project and, therefore, relatively conservative discard were recommended, based on current practice and on discussions with rope inspectors and other parties concerned with rope safety. Two appendices to the report present recommended changes to the discard criteria and other changes to the code of practice for rope condition assessment (SABS0293) respectively. Where appropriate, background information is presented to facilitate a decision on how to implement these changes. A third appendix presents responses obtained when the draft version of this report was circulated.