On two separate rigs operated by the same contractor, identical failures occurred on rotary hoses that had both been in routine service for less than one year. During routine connection operations while picking up the kelly from the rat hole, the hose bodies separated from the swivel end steel connectors. Fortunately, both were caught and retained by the safety chain assemblies. No injuries or additional rig damages were incurred. Both of these were identical 4,000 psi 3” API Spec hoses. Both hoses were new when placed in service.