NFPA 31 8.7.4 Fuel Supply and Return Piping Maximum Pressure
Can anyone shed light on this requirement? I need to run 18 psi to operate burner correctly.
Seems like there may be an exception not requiring AHJ approval. Which edition are you working with?
NFPA 31 Fuel Oil Piping, Installation and Testing Chapter 8 Fuel Piping Systems and Components
8.5.2 The pressure at the oil supply inlet to an oil-burning appliance shall not exceed 3 psig (gage pressure of 21 kPa). Exception: An appliance that is approved for a higher inlet pressure.
Ok, working with 2011 version.
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Here is what I think the 3psi in NFPA 31 was coming from. Others viewing this may have other insights.
Excerpt from An Engineering Guide to Modern Fuel Systems by Critical Fuel Systems, division of BFS Industries, LLCwww.criticalfuelsystems.com
Do not know if this helped for your particular situation.
Oil pump with pressure regulating valve.
Yes. I believe it is.
The first generic diagram is applicable to the setup we have. Need 18 PSI to inlet of boiler pumps according to the boiler manufacturer. Diagram shows 0 to 3 PSI.
In the previous post I thought you said the burners required 18 psi ["I need to run 18 psi to operate burner correctly."]. In this case, the boiler mounted mounted pumps will need to provide that pressure and the duplex pump transferring fuel piping from the storage tank must have the pressure regulated not to exceed 3psi remembing the title of the section of NFPA 31 "Fuel Supply and Return Piping Maximum Pressure"
Now I am too confused to go on with this discussion. I would contact the boiler's engineering support and see what the fuel transfer pump and piping arrangement will need to comply with NFPA 31.
I was needing some advice regarding a fire system. I failed a fire inspection due to the fact that said fire system is not functioning. I have leased the same building for the past 13 years and not once was I ever required to have the fire system operating. I have tried to locate city codes/ordinances that dictate when such a system is required but I have not been able to find anything for my city. Most other info I come across state that a fire system is only required if the building is two stories high or over 5000 sq ft. We are technically a welding school so I could understand why as a school it might be a requirement but once again this was never a problem or issue in the past. Any insight on your behalf would be greatly appreciated. Thanks!
This is different subject than the post. You may want to post it under another subject line.
Looks like this may be a existing business occupancy in accordance with NFPA 101, Life Safety Code. However, the life safety and fire codes normally require installed systems to be maintained even though the fire alarm system is not required by the codes for existing buildings.
Let's see what the Life Safety Code says.
Excerpt from 2009 NFPA 101:
18.104.22.168 No existing life safety feature shall be removed or reduced where such feature is a requirement for new construction.
22.214.171.124* Existing life safety features obvious to the public, if not required by the Code, shall be either maintained or removed.
A.126.96.36.199 Examples of such features include automatic sprinklers, fire alarm systems, standpipes, and portable fire extinguishers. The presence of a life safety feature, such as sprinklers or fire alarm devices, creates a reasonable expectation by the public that these safety features are functional. When systems are inoperable or taken out of service but the devices remain, they present a false sense of safety. Also, before taking any life safety features out of service, extreme care needs to be exercised to ensure that the feature is not required, was not originally provided as an alternative or equivalent, or is no longer required due to other new requirements in the current Code. It is not intended that the entire system or protection feature be removed. Instead, components such as sprinklers, initiating devices, notification appliances, standpipe hose, and exit systems should be removed to reduce the likelihood of relying on inoperable systems or features.
Applying Section 188.8.131.52 and looking at Section 184.108.40.206 New Business Occupancies - General. A fire alarm system in accordance with Section 9.6 shall be provided in all business occupancies where any one of the following conditions exists:
(1) The building is three or more stories in height.
(2) The occupancy is subject to 50 or more occupants above or below the level of exit discharge.
(3) The occupancy is subject to 300 or more total occupants.
If the above conditions (1) - (2) does not apply to your existing building according with Section 220.127.116.11, then a fire alarm system is not required. In terms of the Life Safety Code Section 18.104.22.168 you have the option of maintaining or removing the system.
The requirements of the Life Safety Code are typically followed by the ICC codes, or they typically could be used as a basis for equivalencies to the ICC codes per the AHJ approvals.
According you must have approval from the local AHJ if you plan to remove the system as your plan of correction for the citation.
I greatly appreciate your help. A local fire Lieutenant stated to us earlier that our city follows the 2012 International Fire codes so does what you stated still apply to us?? He directed us specifically to chapter 9 of the 2012 IFC but we are uncertain under what group we fall into.
Allied Skills Training Center2045 Les Mauldin Rd., Ste. BBrownsville, TX 78521Tel: 956-548-2100Fax:956-548-2105Email: email@example.com
On Thursday, June 21, 2018 02:04:39 PM CDT, milt.werner <firstname.lastname@example.org> wrote:
Re: How was 3 psi maximum pressure derived?
reply from Milton Werner in Building & Life Safety - View the full discussion
Applying Section 22.214.171.124 and looking at Section 126.96.36.199 General. A fire alarm system in accordance with Section 9.6 shall be provided in all business occupancies where any one of the following conditions exists:
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Yes if those conditions do not exist in the building in accordance with Section 907.2.2 of the IFC:
Excerpt for the IFC:
You may want to personally contact the building department and see if removal of the fire alarm system can be approved since the new construction codes do not require the fire alarm system. You will most likely need to get a permit to remove it anyway. Take as much building data that you can to the reviewer at the building department. Floor plans are very helpful. If possible have the fire inspector attend that meeting so he is involved.
What if the fire sprinkler system was not working when we started working in the building since 13 years ago and it has never been an issue before until last year when they failed us for not having a working fire system
Here again if not required by the adopted building code or life safety code for new construction, the code should have the option of maintaining or removing the system. Contact you local building department with the new code requirements in hand and see what your options are.
Boiler feed pumps need 18 psi entering. They then take the burner feed pressure to 174 psi. Same scenario as diagram #1 except regulator would be set at 18 psi which exceeds the 3 psi code pressure.
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