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EN 12845

High Hazard Process Group 1 (HHP1)

EN 12845 classification for chemical plants and solvent handling.

Definition

HHP1 design density jumps to 7.5 mm/min over 260 m². Pump duty point and tank capacity typically double versus OH3. Combine with foam-water sprinkler systems (EN 13565) when handling flammable liquids.

Referenced in

  • EN 12845

Design it in FireTwin AI

Generate a compliant sprinkler layout, run the hydraulic calculation and export a priced bill of materials — checked against EN 12845 and NFPA 13.

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