[Sprinklerforum] Re: Elbows in pump suction

Also if you look at - 4.15.6.3.3 Elbows and tees with a centerline plane perpendicular to the horizontal split-case pump shaft shall be permitted at any location in the pump suction intake - This says to me that the suction piping could be going up or down and your current configuration sounds like

[Sprinklerforum] Re: Elbows in pump suction

Todd, Your proposed configuration is allowed per NFPA 20 (2016) Figure A.4.15.6 bottom row. Ryan L. Hinson, PE*, SET** \ Burns & McDonnell Associate Fire Protection Engineer O 612-900-3755 \ M 763-688-4045 \ F 952-229-2923 rhin...@burnsmcd.com \ burnsmcd.com

[Sprinklerforum] Re: Elbows in pump suction

Your fire pump testing is allowed to be done at actual system demand if the water supply is not capable of providing water for full flow of the fire pump 14.2.6.2.4 Where the maximum flow available from the water supply cannot provide a flow of 150 percent of the rated flow of the pump, the fire p

[Sprinklerforum] Re: Elbows in pump suction

Todd, You’re right, sorry for not actually answering your question! IMO, splitting the distance over multiple straight lengths is fine. It’s all about actual travel distance from the illegal elbow to the suction flange. Either way, with 17psi missing, I’m pretty confident that this is not the

[Sprinklerforum] Re: [EXTERNAL] Re: Elbows in pump suction

You measure from the centerline of the offending elbow (the one in the direction you aren’t allowed to go) to the pump suction flange and you need those 10 pipe diameters, but you can go up or down as many times as you want to get the required length, as long as all the elbows you are measuring

[Sprinklerforum] Re: Elbows in pump suction

Todd, It mentions Flange to Flange, so I have always taken it as linear. R/ Matt Please rate our customer service Matthew J. Willis, CWBSP, CET Engineering Designer IV FERGUSON FIRE DESIGN, LLC A Wholly Owned Subs

[Sprinklerforum] Re: Elbows in pump suction

Eric, My main question is if the 10 diameter requirement can be split into 2 section or does it have to be one continuous length? The problem is that the suction pressure on the pump test goes to 0 psi at 1500 gpm. Based on my calculations, it should be around 17 psi. I kno

[Sprinklerforum] Re: Elbows in pump suction

Todd, Like Brett mentioned, going vertical to eat up pipe length is shown in the annex of NFPA 20, and I’ve seen/used that approach before. When you say there is a problem with the test, is this for a new fire pump installation? Are you not meeting your curve, and if so, are you off by a substa

[Sprinklerforum] Re: Elbows in pump suction

If you look at FIGURE A.4.15.6 Right and Wrong Pump Suctions, one of the diagrams does show something similar to what you are proposing. I will be on Holidays from August 12th to 21st, returning to work on Tuesday August 22nd Thanks Brett Peters General Manager Installation & Design Proudline Fi

[Sprinklerforum] Elbows in pump suction

I am working on a pump house that has a 1500 gpm pump with an 8” suction line (no reducer). There is an elbow in the suction line parallel to the pump shaft with a piece of pipe that is 38” from the suction flange and there is a problem with the test. We have to add