HarsNet was the “Thematic Network on Hazard Assessment of Highly Reactive Systems" with its focus on batch and semi-batch reactors. It was a four-year European Community programme that started in September 1998 and initially involved 31 partners. Subsequently additional guest partners have joined HarsNet. One of its main purposes was to make available to Small and Medium sized Enterprises (SMEs) the best available advice for assessing and controlling the hazards of exothermic reactions. The HarsNet Thematic network was the European Community Project BET2-0572 funded in part by contract number BRRT-CT98-5066 (https://cordis.europa.eu/project/id/BRRT970041/results/es).

The results of HarsNet involved six areas: HarsMeth, HarsBase, HarsSMEs HarsWeb, HarsEdu, and HarsBook. The main objectives of introducing HarsNet are to share HarsMeth and HarsBook with all proffessionals involved in Chemical Process Safety.