The objective of this standard is to describe the requirements for the manufacture and testing of cast iron and composite brake blocks to be installed on:
The Standard sets out requirements and recommendations for the design and manufacture of brake blocks used on rolling stock. It focuses on areas such as testing processes, nominal performance requirements, and the quality of finished products.
The review introduces several updates that align the Standard with current methodologies, with only minor impact expected for rail organisations. Key changes include a revised title to better align with other brake component Standards. The Standard removes specific minimum and maximum coefficient of friction values and replaces them with nominal requirements. Improvements have also been made to the testing process, including correcting errors and clarifying wording to support compliance. In addition, the Standard now includes coefficient of friction values for five different types of brake blocks, providing clearer guidance for application.
The Standard manages several risks related to braking performance on rolling stock. These include the risk of brakes being inadequate while a train is moving, which could affect the ability to slow or stop safely. It also addresses risks when trains are stationary, ensuring braking remains effective in holding position. Other risks include excessive brake material friction, which can lead to wear or damage, and over-braking of vehicles or wheelsets. By addressing these risks, the Standard supports safe and controlled braking performance in a range of operating conditions.
The Standard provides clear requirements and recommendations for the design and manufacture of brake blocks used in rolling stock. It covers testing processes to confirm that brake blocks perform as intended, as well as nominal performance requirements to guide acceptable operation. The Standard also addresses the quality of finished products, helping ensure that brake blocks are fit for purpose. Together, these features provide a structured framework for organisations to specify, assess and procure brake blocks that meet consistent performance and quality expectations.
The Standard supports safety by ensuring that brake blocks, which are critical components of the braking system, are suitable for their intended application. It helps ensure that trains can be controlled and stopped as required, without causing damage such as wheel skidding. By promoting the correct selection and performance of brake blocks, the Standard reduces the risk of braking failures or unsafe conditions.
The Standard can be implemented by adopting it in full and updating internal standards to align with its requirements and revised title. This includes reviewing and updating any contractual arrangements with suppliers to ensure consistency. Organisations should avoid partial adoption, as this may reduce braking performance and weaken risk management. Existing internal standards, particularly those that specify different testing requirements, should be reviewed and risk assessed to confirm they provide equivalent or better control. Full adoption supports consistent application and helps ensure that braking risks are managed effectively.
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The objective of this Standard is to seek to achieve a common level of safety and performance across all operators, encourage good practice in human factors issues and achieve economies of scale by encouraging a reduction in the differences between the signalling equipment and materials used in the various rail networks in Australia.
