Hi everyone, Please assist me with your suggestions and answers on the following scenario. Hundreds of SCBA sets are placed in a wok location. None of these breathing Air cylinders are due for hydro test. As per industrial and safety standards, all BA cylinders to be hydro-tested every after 5 years. Old air stored in cylinders to be released before hydro test and fresh air to be filled after test. I hope, now it is clear that some of the unused BA sets used at above site may have air older than 4 years as the organisation do not have a track of last Air filling date for each cylinders. Please share your experiences and knowledge on hazards and risks associated with the inhalation of stored air from BA sets, Please consider all factors such as the ones given below. * Is there a need for Air quality test for all cylinders * What kind of air contamination can occur in case of internal corrosion of MS cylinder. * What all are the regulatory requirements related to breathing air storage Warm regards SeekNfo

BS 529:2005 states that in the case of compressed air for breathing apparatus ‘the volume flow and quality of the air should be thoroughly tested at intervals as specified by a competent person’. COSHH regulations state that ‘testing should be conducted at least once every 3 months and more frequently when the quality of the air supplied cannot be assured’. BS EN137 supersedes all of above for industrial BA I think Phil