Hi all,
Thanks again for your input,Cidona I too have experience with LPC Sprinkler Projects , in particular the use of orifice plates for balancing the roof and rack systems as you state, however these are Deluge Systems with a fixed area and density therefore the demand will not vary, my...
Travis,
Thanks for your reply, we used to call the short pieces of smaller diameter pipes "choker pipes" but it has been so long since I used them I never gave them a thought for this job!!...in essence they work in the same way as an orifice plate,as you state they eat up the excess...
Hi all,
Thanks for your replies, thanks for the short answer Sprinklerdesigner, but I still think there may be some clarification in the definition of balancing and the use of orifice plates, we are not hydraulically balancing systems that operate simultaneously, we are reducing pressure on...
Hi all,
Your considered advice would be welcome on the following:
We have Power Plant with a huge Gas Oil Storage Area with Cooling Systems giving a demand of around 25000 USGPM, this demand is supplied via 5 No. 20% Duty Fire Pumps.
Supplied from the same Underground Ring Main we have...
Hi All,
Could someone please advise if there any NFPA requirements for Hydrostatic Pressure Testing of the Fire Pump Suction Piping?
Is it subject to the same requirements as the "system side"?
I am aware of the code requirements regarding test pressures in NFPA13, but do these apply to the...
SD2,FP1,
Thank you for taking time to reply...SD2...I am from the UK and of a certain age that I too value the foot or yard as much as the centimetre or metre!The water storage tank is a simple NFPA 22 above ground tank giving positive suction conditions.
Unfortunately for me, you have both...
Gentlemen,
Your assistance would be appreciated please, the above clause in NFPA 20 states that the Jockey Pump stop point should equal the churn pressure of the Pump plus the minimum static supply pressure, I have a 10m High Fire Water Storage Tank, I have an 8" Outlet on the Tank and 8" Inlet...
Hi All,
Could someone please advise if it is a code requirement within NFPA 20 for the Jockey Pump and it's Controller to be located in the same room as the Fire Pumps.
As you can probably guess I have space issues!
Cheers
DTR
They are bringing one feeder from the Utility with the changeover from normal to alternate power taking place at the Generator rather than the Fire Pump Room. So we have 1 No. Cable per Electric Pump Controller and the Transfer Switch will sit there doing nothing!!
I have told them it is not...
Hi all,
Hope you can help me, I have clients engineer who I need to convince that we have to have a dedicated and separated power supply to our Auto Change Over Switches from the Alternate Supply, I know this and I have provided the details in figure A.10.8, question is:
Does it clearly state...
Hi all,
I have a requirement for a pressure booster Pump, I am protecting a large Tank Farm on a Power Plant with Foam Monitors and I require about 10 Bar at the Monitor. By the time I work out the losses I need about 13 Bar at the inlet of the Foam Proportioning Skid (I am using a FireDos...
I have a client who has requested a connection from our Fire Main to top up a water cooled heater circuit, I have told him that it's just not done, Fire Mains are for Fire Systems and it will affect the operation of the Pumps but I can't find anything in NFPA 24 that tell me it is...
Crushed stone within Transformer Pens is very common, I have been told that the crushed stone helps prevent any oil spills from "pooling" thus reducing the risk of large spill fires.
Because the stone is non absorbing, the Deluge System protecting the Transformer should also spray the floor at...
Can anyone please advise me if there is a restriction on the number of Fixed Fire Protection Systems (Deluge Waterspray)that can be supplied from a spur off a Yard Ring Main.
I thought there was something in NFPA 850 but I can't find it, my concern is the number of systems that may be isolated...
I have a client who is requesting a steam injection Fire Protection System to a storage silo.I think that what he actually means is a Deflegration Supression System. I have read NFPA 69 and I think I grasp the concept, however I have no experience in designing this type of system and I would...
