This European Standard specifies:characteristics that suspension diaphragms achieves, together with applicable inspection and test methods tobe carried out for verification;approval procedure to be implemented byThe customer;guidelines for qualification of the product with specified requirements;quality monitoring of diaphragms in manufacture;supply requirements.This European Standard applies to suspension diaphragms designed to be fitted on railway vehicles and similarvehicles running on dedicated tracks with permanent guide systems, whateverThe type of rail andThe runningsurface.The European Standard does not detailThe other components of pneumatic suspension assemblies or controlsystems such as air reservoirs, frames, stiffeners, emergency suspension systems or elastic supports (such asseries springs), etc., which will affectThe diaphragm performance.