مبادئ ومواصفات تركيب حنفيات – فوهات الحريق

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نستعرض لحضراتكم فى هذه المقالة مواصفات ومبادئ تركيب حنفيات الحريق:

حنفيات(فوهات) الحريق الخارجية مواصفاتها ومبادي تركيبها
* يتم توزيع عساكر الحريق ( حنفيات الحريق الخارجية ) fire hydrant بحيث يغطي كل منها 30 m
* وتوجد حول المبني وهي حنفية ½2 ” وتعطي تدفق 250 gpm اي 946 لتر/ دقيقة وضغط 4.5 بار
* وهي تكون بمثابة خط دفاع ثاني حيث تكون مليئة بالماء طوال الوقت كونها مشبوكة مع الشبكة الرئيسية للمدينة .
*بحيث اذا فشلت عملية اطفاء الحريق من الداخل ياتي رجل الاطفاء ويقوم بالتوصيل بهذة الماسورة ويحاول اطفاء الحريق من خارج المبني .

س: ماهو ارتفاع حنفيات الحريق الخارجية fire hydrant ؟
يتراوح ارتفاع حنفيات الحريق fire hydrant بارتفاع بحد ادني 18″ وحد اقصي 36″
س:ماهي المحابس valves التي يتم تركيبها علي خط حنفيات الحريق الخارجية fire hydrants؟
يتم وضع صمام بوابة gate valve ويتم التوصيل بين صمام البوابة والبايب عن طريق فلانشة flange
*س: هل يمكن ان نقوم بتركيب صمام عدم رجوع non return valve علي خط حنفيات الحريق الخارجية fire hydrant ؟
لا يجب عدم تركيب صمام عدم رجوع non return valve مع حنفيات الحريق الخارجية fire hydrants
*س: ما هو الارتفاع المسموح لمركزالفوهة الخارجية القائمة fire hydrant عن الارض؟
من 45 :75 سم عن مستوي سطح الارض

س: ما هو عدد الفوهات الخارجية fire hydrants والمسافات بينهما من الاستخدام للخطورات التالية :
1- الخفيفة (مناطق سكنية)
2- المتوسطة ( مناطق تجارية )
3- العالية ( مناطق صناعية وتخزين )
ج:
1- عدد الفوهات=1 ، المسافة = 100-150 ، زمن الاستخدام 30 دقيقة .
2- عدد الفوهات=2 ، المسافة = 75-100 ، زمن الاستخدام 60 دقيقة
3- عدد الفوهات=4 ، المسافة = 60-75 ، زمن الاستخدام 90 دقيقة
*س: ما هي المسافة التي يبعدها خط حنفيات الحريق الخارجية fire hydrant عن المبني المطلوب حمايتة من الحرائق؟
يتم تركيب حنفيات الحريق الخارجية fire hydrants علي مسافة 40 قدم ( 12.2 متر) علي الاقل من المبني

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