Offshore petrol/gaz platformunda helideck helikopter inis kalkis alanidir. Jet A yakit dolu helikopter crash scenario buyuk yangin riski tasir. NFPA 418 (Standard for Heliports) ve CAP 437 (UK Civil Aviation) Deck Integrated Firefighting System (DIFFS) ve Foam Monitor kurallarini tanimlar. 2009 Cougar Crash Newfoundland sonrasi DIFFS zorunlu.
DIFFS Deck Integrated Foam
- Tasarim yogunlugu: 5.5 L/min/m2 (yuvalar) AFFF
- Deck alani: S-92 icin 25 m D-value
- Nozul: Flush-mount deck icine gomulu
- Aktivasyon: 15 saniyede full coverage
- Duration: 10 dakika (NFPA 418)
Foam Monitor (Fixed)
- Flow: 1500-3000 L/min per monitor
- Uzaklik: 50 m menzil
- Sayi: 2-4 monitor deck kenarinda
- Uzaktan kontrol: Joystick + auto sweep
- Fluor-free foam (F3): 2026 geçişi PFAS restrictions
CAP 437 ve ICAO Farki
- CAP 437 (UK): Cok siki - DIFFS zorunlu
- ICAO Annex 14: Minimum yarım - monitor yeterli
- NFPA 418: ABD - monitor + deck hybrid
- API RP 14G: ABD offshore - NFPA 418 referans
- Class H1-H3: Helicopter agirlik bazli (5-13 ton)
Firewater Ring Main
- Deniz suyu: Firewater pompa (jockey + main + diesel backup)
- Ring main: Platformun cevresi, iki kollu besleme
- Dry riser: Helideck seviyesi + accommodation
- Hiz: Monitor uygulama 2.5-5 m/s hat
Helideck Drainage
- Egim: 1-2 percent (yakit sivi kenarlara)
- Perimeter drain: 300 mm cap
- Fuel slop tank: Toplama tanki - oil-water separator
- Fire pump room: 2 saat firewall
- Fresh water rinse: Tuz korozyonunu azaltir - deniz suyu sonrasi
Helideck SprinkCalc ile
SprinkCalc offshore helideck icin NFPA 418 DIFFS AFFF debisi, monitor sayisi ve ring main hesabini yapar.
SprinkCalc'i App Store'dan indir
Kaynaklar & İleri Okuma
NFPA 418, CAP 437, ICAO Annex 14 Vol II, API RP 14G, API RP 2218. NFPA 418 Heliports kodu.