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One more question. We have a wet riser system. water is charged direct from yard main. Standpipe is furnished with isolation valve. At each floor level we have hose cabinets with Landing valve. Do I need an additional isolation valve at each Branch line? Is it allowed acc. Acc. NFPA 14. In...

Thank you Devid for your detail explanation. Very helpful.

Yes.

Hallo all, According to NFPA 12 How much quantity of CO2 is neacessary to protect dry electrical hazards. How should i calculate, approxmately? Thank you for replys.

You are right but it is the requirement from local fire brigade. We have to implement.

I am responsible for plant safety.

Yes these heat detectors i have foreseen to intiate audio and visual alarming devices. not for extinguishing systems.

Hello all, What is a steam curtain ? how does it work. is there any NFPA standard? any one have some info abt this system. we want to install a steam curtain system around the furnace to stop flammable gases travelling towards heater. How does it functions? In case of fire how it will be...

Hello all, Thank you for replies. so here i describe a little more in detail. I want to design fire detection system for the complete plant. Its a chemical plant with hazardous liquids and gases. All the process area is open type construction. For gas detection I have chosen diff gas detectors...

Hello all, Placing Heat detectors in outdoor near to pumps with flammables makes any sense? Thank you.