Despite its synthetic relevance, ozonolysis is still an underused reaction in the synthetic chemistry industries. This can be attributed to safety issues while handling the ozone itself, alongside extra hazard related to unstable reaction intermediates. Flow chemistry is inherently safer as it involves a small volume of reagent at any given time. Here, to address safety and technical issues, we describe the design and testing of an ozone dosing line. A global risk assessment and the description of the setup, the analytics, are presented in detail. This new dosing line enabled the successful scale-up of β-pinene ozonolysis in flow, with a productivity of over 16 g/h.