Fire Water Demand Basis.docx

Fire Water Demand Basis This document outlines the general design basis for firewater demand for the LPG Facility

Reference NFPA 15

Water Spray Fixed Systems

API 2510

Design and Construction of LPG Installations

API 2510A

Fire Protection Considerations for the Design and Operation of LPG storage facilities

Hazardous Area Classification Zone 0 - Explosive atmosphere is or is likely to be permanently present Zone 1 - Explosive atmosphere is likely to be present in normal condition of operation Zone 2 - Explosive atmosphere is likely to be present in abnormal condition or during a short duration in normal condition.

Fire Zones

Fire Zone F LPG Storage Area ZONE 1

Fire Zone H LPG Loading Area ZONE 1 Fire Zone i Accommodation Area

Fire Zone E LPG Admin Area ZONE 2

ZONE 2 Fire Zone G IPP Area

Fire Zone A LPG Process Area

ZONE 1

Fire Zone C LPG Utility Area

Fire Zone D Warehouse Area ZONE 2

ZONE 2 Fire Zone B Diesel Area

ZONE 1

ZONE 1

Firewater Demand Basis The firewater system shall be designed to supply the quantity of water required for the single largest fire scenario (fire zone). Fire water demand (m3/hr.) = Surface Area (m2) x Application Rate (l/min/m2) Application Rate according to NFPA 15 Vessel – 10.2 l/min/m2 Package – 10.2 l/min/m2 Pumps – 20.4 l/min/m2 Compressors – 20.4 l/min/m2 Surface Area Calculation Horizontal Vessel = πDL + 0.75πD2 (Horizontal vessel at 75% liquid filled) Vertical Vessel = πDH + 0.5πD2 (Vertical vessel at 50% liquid filled) Package = 75% of Surface Area = 0.75 (L X D)

D = Diameter L = Length H = Height