Clarity is there. I appreciate all of the help. Bobby Gillett Sr. Project Manager Key Fire Protection, Inc. (731) 424-0130 office (731) 424-9285 fax (731) 267-4853 cell www.keyfireprotection.com
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Thursday, October 25, 2012 1:10 PM To: [email protected] Subject: RE: Diesel Tanks NFPA 20 A low level alarm that meets NFPA 20-(2010) 12.4.1.4(7) is supposed to alarm at 2/3rds level. That is considered "low level". It's a required signal. Craig L. Prahl, CET Fire Protection CH2MHILL Lockwood Greene 1500 International Drive Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 CH2MHILL Extension 74102 [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Bobby Gillett Sent: Thursday, October 25, 2012 1:51 PM To: [email protected] Subject: RE: Diesel Tanks NFPA 20 Thank you Craig. Per 11.4.6.2 we plan on installing a sensor to determine when the tank is at the two-thirds level and that sensor will be wired to the controller as there is a receptor supplied. The owner wants to use this level as their low level so they will maintain this much fuel at all times. Does this sound acceptable? Bobby Gillett Sr. Project Manager Key Fire Protection, Inc. (731) 424-0130 office (731) 424-9285 fax (731) 267-4853 cell www.keyfireprotection.com -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Thursday, October 25, 2012 12:44 PM To: [email protected] Subject: RE: Diesel Tanks NFPA 20 Sight tubes cannot be used for determine fuel levels, (11.4.2.6.1) it must be a monitored signal device. With automatic run testing it could be months before someone actually went into a pump room and looked at the sight tube to see what the level is. 11.4.2.4 says you need to provide a device that will provide a signal, 11.4.6.2 says at what level the device needs to alarm. They go hand in hand. Craig L. Prahl, CET Fire Protection CH2MHILL Lockwood Greene 1500 International Drive Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 CH2MHILL Extension 74102 [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Thursday, October 25, 2012 12:05 PM To: [email protected] Subject: RE: Diesel Tanks NFPA 20 One is a switch and the other can be a sight glass. Ron Fletcher Aero Phoenix -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Johnson, Duane (NIH/OD/ORS) [C] Sent: Thursday, October 25, 2012 9:01 AM To: '[email protected]' Subject: Re: Diesel Tanks NFPA 20 Need both. ----- Original Message ----- From: Bobby Gillett [mailto:[email protected]] Sent: Thursday, October 25, 2012 11:55 AM To: [email protected] <[email protected]> Subject: RE: Diesel Tanks NFPA 20 Any thoughts at all? Bobby Gillett Sr. Project Manager Key Fire Protection, Inc. (731) 424-0130 office (731) 424-9285 fax (731) 267-4853 cell www.keyfireprotection.com -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Bobby Gillett Sent: Thursday, October 25, 2012 9:28 AM To: [email protected] Subject: Diesel Tanks NFPA 20 I know this is an NFPA 20 question, but I am hoping to get clear on something if anyone can help. NFPA 20: 11.4.2.4 A means shall be provided in the tank for low fuel level signal initiation. 11.4.2.6.2 A fuel level indicator shall be provided to activate at the two-thirds tank level. If I am correct, 11.4.2.6.2 is requiring an indicator to activate when the tank is 1/3 below its capacity, and I assume that this is so they can maintain a minimum amount of fuel at all times (if they react when notified). Wouldn't this also act as the low fuel level signal that 11.4.2.4 is requiring? Thank you, Bobby Gillett Sr. Project Manager Key Fire Protection, Inc. 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