Scope of Work

• Repair & upgrade of wet-pipe fire suppression system serving Switch Room, TCF Room, and UPS/Battery Room.

• System classified as Ordinary Hazard (UFC 3-600-01, Table 9-3) with density 8 mm/min (0.20 gpm/ft²) over 230 m² (2,500 ft²) for a 1-hour duration.

• Full hydraulic re-calculation, zoning, and pump/tank integration carried out.

• Designed for U.S. Army Corps of Engineers approval (AFCEE).

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Hydraulic Calculations

• Remote Area: 2,500 ft², ~20 sprinklers (Quick Response, K-8.0)

• End Sprinkler Flow: 26 gpm @ 10.6 psi

• Sprinkler Flow (Total): ~592.7 gpm

• Hose Allowance: 250 gpm

• Total System Demand: 842.73 gpm (~112% of rated pump capacity – UFC permits up to 140%)

• Residual Pressure at Supply: 61.95 psi

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Fire Pump & Water Supply

• Diesel Fire Pump: 750 gpm @ 65 psi (Peerless, UL/FM listed, USA)

• Jockey Pump: 10 gpm @ 75 psi (Grundfos, Europe)

• Fire Water Tank: 200 m³ GRP (10m × 5m × 4m, Hi-Tank, Korea)

• Pump House: 5m × 5m, ventilated & air-conditioned to NFPA 20 requirements

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System Materials & Equipment

• Sprinklers: Viking VK202-D, Concealed Pendent, K-115 (K=8.0), 68°C

• Valves & Fittings: Giacomini (Italy), Viking (USA), Nibco OS&Y with supervisory switch

• Steel Piping: ASTM A53 Sch 40 Black Steel (Al Jazeera – Oman)

• Underground Piping: Ductile Iron, AWWA C151/A21.51 (Saudi – SADIP)

• Accessories: Waterflow switches (Potter), Fire Dept. connection (Croker USA), Alarm Bell (Viking)

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Compliance & Outcome

• System complies with UFC 3-600-01, NFPA 13, NFPA 20, and NFPA 72.

• Hydraulic calculations confirmed adequate flow and pressure with ~12% safety margin.

• Full submittal package delivered: design drawings, hydraulic calc report, and equipment datasheets for AHJ/US Army approval.