International Organization for Standardization (ISO)
Latest
ISO/PAS 22574:2007
Scope
Friction linings are composite materials with complex structure. Due to their composition and their production
process, visual appearance characteristics can occur which in a precisely defined design are to be regarded
as specific to the product. This International Standard defines visual aspect for the identification and
assessment of such product characteristics in quality assurance, as well as a basis for commercial and
technical agreements. The sequence of the product characteristics represents no order of priority. The brake
linings are inspected in the “as supplied” condition, meaning unused. In some characteristic features, there
are differences between brake linings with an effective lining pad surface < 120 cm2 and W 120 cm2. The
acceptance criteria within the International Standard do not allow any characteristics which could impair the
function and performance of brake linings and are applied unless there are other agreements between the
customer and the supplier.