This International Standard specifies requirements for an internationally acceptable series of boiling flasks with conical ground joints for general laboratory purposes.
BS EN ISO 4797:2005 history
2016BS EN ISO 4797:2015 Laboratory glassware. Boiling flasks with conical ground joints
2005BS EN ISO 4797:2005 Laboratory glassware - Boiling flasks with conical ground joints
BS EN ISO 4797:2005 Laboratory glassware - Boiling flasks with conical ground joints has been changed from BS 6352:1983 Specification for flasks with ground glass joints.