Second Revision No. 20-NFPA 14-2015 [ Section No. 1.4 ] · Second Revision No. 20-NFPA 14-2015 [ Section No. 1.4 ] 1.4* Equivalency. Nothing in this standard is intended to prevent

Second Revision No. 20-NFPA 14-2015 [ Section No. 1.4 ]

1.4* Equivalency.

Nothing in this standard is intended to prevent the use of systems, methods, or devices of equivalent orsuperior quality, strength, fire resistance, effectiveness, durability, and safety over those prescribed by thisstandard.

1.4.1

Technical documentation shall be submitted to the authority having jurisdiction to demonstrateequivalency.

1.4.2

The system, method, or device shall be approved for the intended purpose by the authority havingjurisdiction.

Supplemental Information

File Name Description

New_Annex_A.1.4.docx

Submitter Information Verification

Submitter Full Name: Chad

Organization: [ Not Specified ]

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Submittal Date: Wed Apr 08 13:10:45 EDT 2015

Committee Statement

CommitteeStatement:

It is not the intent that portions of a future standard be selectively applied, only a completeedition of that future standard. See new annex A.1.4.

ResponseMessage:

Public Comment No. 22-NFPA 14-2014 [New Section after 1.4]

National Fire Protection Association Report http://submittals.nfpa.org/TerraViewWeb/ContentFetcher?commentPara...

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A.1.4 It is the intent of the Committee to recognize that future editions of this standard are a further refinement of this edition and earlier editions. The changes in future editions will reflect the continuing input of the fire protection community in its attempt to meet the purpose stated in this standard. Compliance with all requirements of a future edition could be considered as providing an equivalent level of system integrity and performance of the system.


2.4 References for Extracts in Mandatory Sections.

NFPA 13, Standard for the Installation of Sprinkler Systems, 2016 edition.

NFPA 24, Standard for the Installation of Private Fire Service Mains and Their Appurtenances, 2016edition.

NFPA 25, Standard for the Inspection, Testing, and Maintenance of Water-Based Fire ProtectionSystems, 2014 edition.

NFPA 101®, Life Safety Code®, 2015 edition.

NFPA 241, Standard for Safeguarding Construction, Alteration, and Demolition Operations, 2013 edition.

NFPA 1002, Standard for Fire Apparatus Driver/Operator Professional Qualifications, 2009 2014 edition.

NFPA 5000®, Building Construction and Safety Code®, 2015 edition.


Submitter Full Name: CHAD DUFFY

Organization: NATIONAL FIRE PROTECTION ASSOC

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Submittal Date: Tue Apr 21 08:27:28 EDT 2015

Committee Statement

Committee Statement: Editorial revision.

Response Message:


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Second Revision No. 17-NFPA 14-2015 [ New Section after 3.3.3.2 ]

3.3.4 Construction Types.

3.3.4.1 Type I and Type II Construction.

Those types in which the fire walls, structural elements, walls, arches, floors, and roofs are of approvednoncombustible or limited-combustible materials.

3.3.4.2 Type III Construction.

That type in which exterior walls and structural elements that are portions of exterior walls are ofapproved noncombustible or limited-combustible materials and in which fire walls, interior structuralelements, walls, arches, floors, and roofs are entirely or partially of wood of smaller dimensions thanrequired for Type IV construction or are of approved noncombustible, limited-combustible, or otherapproved combustible materials.

3.3.4.3 Type IV Construction.

That type in which fire walls, exterior walls, and interior bearing walls and structural elements that areportions of such walls are of approved noncombustible or limited-combustible materials. Other interiorstructural elements, arches, floors, and roofs are constructed of solid or laminated wood or cross-laminated timber without concealed spaces within allowable dimensions of the building code.

3.3.4.4 Type V Construction.

That type in which structural elements walls, arches, floors, and roofs are entirely or partially of wood orother approved material.




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Committee Statement

CommitteeStatement:

The definitions for construction types has been added to aid in the application of section6.1..2.

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Second Revision No. 2-NFPA 14-2015 [ Section No. 4.1.4 ]

4.1.4

The materials or devices listing instructions shall identify and specify the existing system components,including the fluids conveyed, with which the newly listed materials, devices, or components arecompatible.




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Committee Statement

CommitteeStatement:

Delete this section. Compatibility is a complex subject that cannot be codified in a single section.The majority of the issues that the industry has encountered in regards to compatibility relate toCPVC. NFPA 13 has added language and the labs are working towards some compatibilityprotocols. NFPA 14 should wait to add compatibility language once the 13 Committee and the labshave landed in a more defined place.

ResponseMessage:

Public Comment No. 4-NFPA 14-2014 [Section No. 4.1.4]


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Second Revision No. 23-NFPA 14-2015 [ Section No. 4.4.2.4.2 ]

4.4.2.4.2

The minimum throat thickness shall be not less than the thickness of the pipe, the thickness of the weldingfitting, or 3⁄16 in. (4.8 4.5 mm), whichever is least. [13:6.5.2.4.2]




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Second Revision No. 24-NFPA 14-2015 [ Section No. 5.2.1.1 ]

5.2.1.1 Pressure Gauges.

Approved pressure gauges conforming in accordance with Section 5.5 shall be connected as follows:

(1) On the water side and air side of the dry pipe valve

(2) At the air pump supplying the air receiver where one is provided

(3) At the air receiver where one is provided

(4) In each independent pipe from air supply to dry pipe system

(5) At quick-opening devices

[13:7.2.1]




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Second Revision No. 25-NFPA 14-2015 [ Section No. 5.2.1.4.3.1 ]

5.2.1.4.3.1

Connection pipe from the air supply to the dry pipe valve shall not be less than 1⁄2 in. (15 mm) in diameterand shall enter the system above the priming water level of the dry pipe valve. [13:7.2.6.4.1]




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5.2.1.4.3.2

A check valve shall be installed in this the air line filling connection , and a listed or approved shutoffvalve of either the renewable disc type or ball valve type shall be installed on the supply side of thischeck valve and shall remain closed unless filling the system. [13:7.2.6.4.2]




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5.2.1.4.6

Where the air compressor supplying the dry pipe system has a capacity less than 5.5 ft3/min (156 160L/min) at 10 psi (0.7 bar), no an air receiver or air maintenance device shall not be required.[13:7.2.6.6.2]




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5.2.1.4.12

In addition to the standard hydrostatic test, an air pressure leakage test at 40 psi (2.8 2.7 bar) shall beconducted for 24 hours. Any leakage that results in a loss of pressure in excess of 11⁄2 psi (0.1 bar) for the24 hours shall be corrected. [13:25.2.2.1]




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5.2.2 Auxiliary Systems.

A wet standpipe system shall be permitted to supply an auxiliary dry standpipe system, provided the watersupply is capable of supplying the system demand. [ 13: 7.1.3]




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6.1.2 Protection of Aboveground Piping.

6.1.2.1*

Standpipe system piping shall be protected from mechanical damage and fire damage in accordance withthis section .

6.1.2.2*

Feed mains, standpipes, horizontal standpipes, and branch lines supplied by standpipes shall be locatedin enclosed exit stairways or shall be protected by a degree of fire resistance equal to that required forenclosed exit stairways in the building in which they are located Standpipe systems shall be protected inaccordance with Table 6.1.2.2 .

Table 6.1.2.2 Protection of Aboveground Piping

High - Rise Buildings Non - High - Rise Buildings

ConstructionType

SprinklerProtection

Standpipe Horizontal a Branchline Standpipe Horizontal a Branchline

I AS b √ N/A N/A √ N/A N/A

I NS c √ √ √ √ N/A N/A

II AS √ N/A N/A √ N/A N/A

II NS √ √ √ √ N/A N/A

III, IV , & V AS/NS √ √ √ √ N/A N/A

Notes:

a Refers to either a horizontal standpipe or the horizontal portion of any standpipe such as a feed main.

b AS = fully sprinklered building in accordance with NFPA 13

c NS = nonsprinklered or partially sprinklered building

6.1.2.2.1

In buildings equipped with an approved automatic sprinkler system, horizontal standpipes, feed mains,and branch lines shall not be required to be protected. Protection shall consist of one of the followingmethods:

(1) Enclosure in a fire-rated exit stairway

(2) Enclosure in fire-rated construction with such rating equal to that of the enclosed fire rated exitstairway

(3) Listed fire wrap or other insulating material applied directly to the pipe with such rating equal to thatof the enclosed fire-rated exit stairway

6.1.2.2.2

Piping connecting standpipes to 1 1⁄2 in. (40 mm) hose connections shall not be required to beprotected. Where exit stairways are not required to be enclosed in fire-rated construction, standpipesystems shall not be required to be protected.

6.1.2.2.3

Where exit stairways are not required to be enclosed in fire-rated construction, standpipe systems shallbe permitted to be installed without the fire resistance required by 6.1.2.2 Class II standpipe systems arenot required to be protected .

6.1.2.2.4

Where additional standpipes are needed to meet travel distance requirements in non-high-rise buildings,protection of piping is not required.

6.1.2.2.5

Seismic bracing, where required, shall be in accordance with NFPA 13 .


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6.1.2.2.6

Piping subject to mechanical damage shall be protected by steel posts, concrete barriers, or otherapproved means.

6.1.2.3

Where standpipe system piping that is normally filled with water passes through an area subject tofreezing temperatures, it shall be protected to maintain the temperature of the water in the piping between40°F and 120°F (4.4°C and 48.9°C).

6.1.2.3.1

Antifreeze solutions shall not be used to protect standpipe system piping from freezing.

6.1.2.3.2

Listed heat tracing shall be permitted to be used for protection from freezing.

6.1.2.3.2.1

Heat tracing shall be installed and insulated in accordance with the manufacturer’s specifications.

6.1.2.3.2.2*

Where heat tracing is utilized, it shall be specifically listed for use on fire suppression systems.

6.1.2.3.2.3

Where heat tracing systems are used, they shall be supervised by one of the following methods:

(1) Central station, proprietary, or remote station signaling service

(2) Local signaling service that will cause a signal at a constantly attended location

6.1.2.4

Where corrosive conditions exist or piping is exposed to the weather, corrosion-resistant types of pipe,tube, fittings, and hangers or protective corrosion-resistive coatings shall be used.

6.1.2.5

Where standpipe systems are required to be protected against damage from earthquakes, standpipesystems shall be protected in accordance with NFPA 13.



NFPA_14_Protection_of_Pipe_task_Group_Draft_Final_Report_-_1.docx




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Committee Statement

CommitteeStatement:

Based on committee input #87 the task group on protection of pipe provided the new attachedlanguage which was reviewed and agreed upon by the technical committee on standpipes at the2nd draft meeting. Clarification for protection of was necessary in order to provide under whatcircumstances standpipe system piping requires protection and when it does not.

ResponseMessage:


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Final Report - Protection of Pipe Task Group

Replace Section 6.1.2 with text as shown below.

6.1.2 Protection of Aboveground Piping.

6.1.2.1* Standpipe system piping shall be protected from mechanical and fire damage in

accordance with this section.

A.6.1.2.1 Standpipes should not be installed in non-sprinklered areas of combustible

construction.

6.1.2.2* Standpipe systems shall be protected in accordance with Table 6.1.2.2.

A.6.1.2.2. Where pipes that supply combined systems in areas or buildings that are

sprinklered, or are installed in non-sprinklered, combustible buildings or areas the piping

should be protected. Protection of pipe should also be provided in any area of a

structure or building that poses a degree of hazard greater than that normal to the

general occupancy of the building or structure. This includes areas for the storage or

use of combustibles or flammables; toxic, noxious, or corrosive materials; and heat-

producing appliances.

Table 6.1.2.2 - Protection of Aboveground Piping

High Rise Non High Rise

Construction Type

Sprinkler Protection

Standpipe Horizontal1 Branchline Standpipe Horizontal1 Branchline

I AS2 √ N/A N/A √ N/A N/A

I NS3 √ √ √ √ N/A N/A

II AS √ N/A N/A √ N/A N/A

II NS √ √ √ √ N/A N/A

III, IV & V AS / NS √ √ √ √ N/A N/A

1 - Refers to either a horizontal standpipe or the horizontal portion of any standpipe such as a feed main. 2 – AS = fully sprinklered building in accordance with NFPA 13 3 – NS = non sprinklered or partially sprinklered building

6.1.2.2.1 Protection shall consist of one of the following methods:

a.) Enclosure in a fire rated exit stairway.

b.) Enclosure in fire rated construction with such rating equal to that of the

enclosed fire rated exit stairway.

c.) Listed fire wrap or other insulating material applied directly to the pipe with

such rating equal to that of the enclosed fire rated exit stairway.

Final Report - Protection of Pipe Task Group

6.1.2.2.2 Where exit stairways are not required to be enclosed in fire rated construction,

standpipe systems shall not be required to be protected.

6.1.2.2.3 Class II standpipe systems are not required to be protected.

6.1.2.2.4 Where additional standpipes are needed to meet travel distance requirements

in non-high rise buildings, protection of piping is not required.

6.1.2.2.5 Seismic bracing, where required, shall be in accordance with NFPA 13.

6.1.2.2.6 Piping subject to mechanical damage shall be protected by steel posts,

concrete barriers or other approved means.

Remainder of Section 6.1 is unchanged.


6.3.3

Listed indicating-type valves shall be provided at the standpipe for controlling branch lines where thedistance to the remote hose station exceeds 20 40 ft (6 12 m) measured along the pipe.




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Committee Statement

CommitteeStatement:

On horizontal standpipe systems in a mall, the 20'-0" limitation would be too restrictive and thischange would require control valves for every hose valve. Granted the 40' number is arbitrary butI believe more realistic.

ResponseMessage:



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Second Revision No. 18-NFPA 14-2015 [ New Section after 6.3.6.1.3 ]

6.3.6.1.3.1

The location of the T-wrench shall be acceptable to the AHJ.




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Committee Statement

Committee Statement: Moved requirement to separate section. Renumber 6.3.6.1.3.1 to 6.3.6.1.3.2.

Response Message:

Public Comment No. 7-NFPA 14-2014 [New Section after 6.3.6.1.3]


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Second Revision No. 19-NFPA 14-2015 [ Section No. 6.3.6.1.3 [Excluding any

Sub-Sections] ]

Where a post-indicator valve cannot be used, an underground valve with an approved roadway box,complete with T-wrench and where acceptable to the AHJ, shall wrench, shall be permitted.




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Committee Statement

CommitteeStatement:

Added a space (editorial) and removed language in regards to the AHJ approval of the wrenchlocation. Another comment will add that language as a subsection

ResponseMessage:

Public Comment No. 6-NFPA 14-2014 [Section No. 6.3.6.1.3 [Excluding any Sub-Sections]]


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6.4.2

A listed check valve shall be installed as near as practicable to the point where the fire departmentconnection piping connects to the system main piping in each fire department connection and shall belocated in an accessible location. [ 13: 8.17.2.5.1] .

6.4.2.1

The requirements of 6.4.2 shall apply to manual dry systems. The check valve shall be installed as closeas possible to the fire department connection inlets.

6.4.2.1.1

The check valve shall be located where it is not subjected to freezing conditions.

6.4.2.2

The requirements of 6.4.2 shall apply to manual dry systems.




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Committee Statement

CommitteeStatement:

In areas not subject to freezing temperatures, it is very common for the FDC check valve to beinstalled above ground at the FDC inlet assembly. This avoids costly underground vaults and greatlyfacilitates Inspection, testing, and maintenance. The proposed change better correlates with therequirements of NFPA 13 and expresses the committees intent to keep as much of the FDC pipingas wet as possible.

ResponseMessage:



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6.4.5.2.2.1

The sign in 6.4.5.2.2 shall not be required when the system demand pressure is less than 150 psi(10.3 bar).




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CommitteeStatement:

Since signs have a significant probability of getting lost or stolen, it is important for the firefighters tohave the sign indicating the pressure required at the FDC for the standpipe system. A FDC without asign should be indicative of only 2 conditions (1) it is an older system installed prior to the time whenNFPA 14 started to require the sign, or (2) the sign is missing. An inspector upon seeing a FDC for astandpipe system without a sign can investigate as to whether or not the sign is required. For thosewho attempt to draw a similarity with sprinkler systems, please consider that firefighters must operatethe standpipe system inside the building on floors well above ground level. The pump operator shouldNOT be in a position to guess what pressure to use at the FDC and wait for the firefighters to call formore pressure thereby making firefighting a trial and error operation.

ResponseMessage:

Public Comment No. 27-NFPA 14-2014 [Section No. 6.4.5.2.2.1]


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Second Revision No. 7-NFPA 14-2015 [ Section No. 7.3.2.2.1 [Excluding any

Sub-Sections] ]

Hose connections on one side of a horizontal exit shall not be required where another outlet on that sideof the horizontal exit can reach the portions of the building on the other side of the Where all floor areasare reachable from an exit stairway hose connection on the same side of a horizontal exit within thedistances required by 7.3.2.2.1.1 or 7.3.2.2.1.2that would have been protected by the outlet that was asapplicable, the hose connection on the other side of the horizontal exit shall be permitted to be omitted.



A.7.3.2.2.1_2016_Horizontal_Exit.pdf Figure A.7.3.2.2.1




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Committee Statement

CommitteeStatement:

The attached language is proposed to correlate NFPA 14 with the IBC. As currently written,NFPA 14 is opposite of the building code. A revised annex diagram is part of this change as well.

ResponseMessage:

Public Comment No. 23-NFPA 14-2014 [Section No. 7.3.2.2.1 [Excluding any Sub-Sections]]


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7.3.2.5*

A single hose connection shall be permitted to be installed in the open corridor or open breezewaybetween open stairs that are not greater than 75 ft (23 m) apart.




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Committee Statement

CommitteeStatement:

The language has been modified to indicate that the corridors and breezeways are open. Thelocation of the hose valve has been clearly identified in the addition of annex language fromPC#17. Fire operations will utilize the standpipe outlet on the level below the fire floor.

ResponseMessage:

Public Comment No. 25-NFPA 14-2014 [Section No. 7.3.2.5]


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Second Revision No. 9-NFPA 14-2015 [ Section No. 7.6.2 [Excluding any Sub-Sections]

]

Standpipes that are part of a combined system in a building that is partially sprinklered shall be at least 6in. (150 mm) in size.




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Committee Statement

Committee Statement: This modification is based on the Committee Rejection Statement for PI #96.

Response Message:

Public Comment No. 9-NFPA 14-2014 [Section No. 7.6.2 [Excluding any Sub-Sections]]


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8.3.1.5 Valves.

Specific friction loss values or equivalent pipe lengths for alarm valves, dry pipe valves, deluge valves,strainers, pressure-regulating device, backflow preventer, and other devices shall be made available tothe authority having jurisdiction. [13:14 23 .4.3.3]




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Second Revision No. 10-NFPA 14-2015 [ Section No. 10.1 [Excluding any Sub-Sections]

]

The volume water flow rate and pressure of a public water supply shall be determined from waterflow testdata or other approved method. [ 24: 5.1.2]




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Committee Statement

Committee Statement: Volume uses units of gallons. The correct reference is water flow rate - gpm

Response Message:

Public Comment No. 28-NFPA 14-2014 [Section No. 10.1 [Excluding any Sub-Sections]]


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11.4.1* General.

All new systems, including yard piping and fire department connection piping, shall be testedhydrostatically at not less than 200 psi (13.8 bar) or 50 psi (3.5 bar) in excess of the system workingpressure, whichever is greater, and shall maintain that pressure at ±5 psi (±0.35 bar) for 2 hours .




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CommitteeStatement:

The +/- 5 psi should apply only to the hydrostatic test of the underground fire main. This is coveredin 11.4.3. It is not difficult to maintain the hydrostatic test pressure without leakage for theaboveground piping portion of the standpipe system. If temperature changes result in pressurefluctuations, the test should be conducted during a time when the change in ambient temperature isminimal (i.e., avoid sunrise and sunset). Contractors who have a difficult time maintaining thehydrostatic test pressure need to improve their workmanship practices. NFPA 14 should not be amechanism to compensate for poor workmanship practices.

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Second Revision No. 12-NFPA 14-2015 [ New Section after 11.5.1 ]

11.5.1.1

The test required by 11.5.1 shall be permitted to be waived where acceptable to the AHJ.




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Committee Statement

CommitteeStatement:

The practice of flowing the entire system demand at the remote hose locations has been in thestandard a long time. While it can prove that water is getting to the roof, is it necessary? The pump(s)are required to be tested. Usually these are in locations that make disposal of the thousands ofgallons of water practical. By requiring the test on the roof, that water has to go somewhere. Therehave been multiple occurrences of a standpipe test discharge causing a roof leader drain to fail andflooding a building out at CO. All standpipes are required to be hydraulically calculated. If plans andcalculations are performed and the system is installed to those plans, why are we not trusting themath? Do we require a bucket test for the remote area of a sprinkler system? If the committee cannotbear to lose this test, they should require a permanent drain adjacent to the remote standpipecapable of handling the flow for the acceptance.

ResponseMessage:

Public Comment No. 11-NFPA 14-2014 [New Section after 11.5.1]


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Second Revision No. 13-NFPA 14-2015 [ Section No. 11.5.2 [Excluding any

Sub-Sections] ]

For a manual standpipe, a fire department pumper, or portable pump of a capacity to provide the requiredflow and pressure shall , or other approved means shall be used to verify the system design by pumpinginto the fire department connection.



New_Annex_A.11.5.2.docx New annex A.11.5.2

Standpipe_Flow_Test_Methods.pdf Figure A.11.5.2




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Committee Statement

CommitteeStatement:

It is not always necessary to use a pump to test a standpipe system. The proposed Annex materialshows 3 test methods, the last of which does not use a pump. Consider where one provides 750gpm at 75 psi at the FDC inlet resulting in 25 psi available at the hydraulically most remote standpipeoutlet. If the standpipe required 100 psi at the hose valve, then adding 75 psi to both the FDC inletpressure (75 psi) and the remote hose valve pressure (25 psi) means that if the FDC were suppliedat 150 psi (75 psi + 75 psi), then 100 psi (25 psi + 75 psi) would be available at the hose valve outlet.

Relying on the hydraulic calculations to demonstrate that the standpipe system will perform ascalculated is dangerous. In testing numerous standpipe systems, I have experienced from 5 psi to 20psi additional pressure over what the hydraulic calculations indicated.

Testing of the standpipe is necessary in order to provide firefighters with the proper flows to fight afire. The standpipe system represents the last chance at effecting extinguishment of the fire. Astandpipe system that fails in a fire can result in firefighter injury or death. NFPA 14 should ensurethat the system performs adequately when the system is new. Consider that standpipe trainingconducted by many fire departments includes how to use the standpipe assuming the supply fromthe FDC is inoperative. Many fire departments do not trust standpipe systems because they havehad many problems.

ResponseMessage:

Public Comment No. 20-NFPA 14-2014 [Section No. 11.5.2 [Excluding any Sub-Sections]]


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A.11.5.2. It is not always necessary to use a pump to test a standpipe system. See Figure A.11.5.2(a),

Figure A.11.5.2(b), and Figure A.11.5.2(c) for examples of possible test methods. When using the

method shown in Figure A.11.5.2(c) it is necessary to flow the system demand while observing the

pressures at the FDC inlet and the hydraulically remote standpipe hose valve. While the standpipe test

may indicate that a greater pressure is required at the FDC inlet than what was indicated in the hydraulic

calculations, this is not necessarily a cause for failing the test. This greater pressure, if acceptable to the

AHJ based on the ability of the fire apparatus to provide the additional pressure, needs to be

incorporated into the standpipe sig required at the FDC by Section 6.4.5.2.2.

Standpipe Flow Test Methods

Test with pump through FDC

250 gpm

250 gpm

100 psi

250 gpm

150 psi

Figure A.11.5.2(a)

http://www.emergencyclipart.com/album.asp?pic=truck2.jpg&cat=Fire/Fire Trucks


Test by Re-Circulating Water

250 gpm 150 psi

100 psi

250 gpm

250 gpm No Hydrant

No Water Discharge

In-Line Flow Meter

Figure A.11.5.2(b)



Test through FDC Without Pump

250 gpm 250 gpm

25 psi

250 gpm

75 psi

FDC Valve

Test 75 25

ADD 75 75

Total 150 100

Flow 750 gpm

750 gpm

Figure A.11.5.2(c)



11.5.7.4

In addition to the standard hydrostatic test, an air pressure leakage test at 40 psi (2.8 2.7 bar) shall beconducted for 24 hours. Any leakage that results in a loss of pressure in excess of 11⁄2 psi (0.1 bar) for the24 hours shall be corrected. [13:25.2.2.1]




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11.8.4

One set of instruction manuals for all major components of the standpipe system shall be provided to thebuilding owner. The manual shall contain the following:

(1) An explanation of the operation of the component

(2) Instructions Manufacturer's instructions for routine maintenance

(3) Instructions Manufacturer's instructions concerning repairs

(4) Parts Manufacturer's parts list and identification for serviceable components

(5) A copy of the current edition of NFPA 25




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Committee Statement

CommitteeStatement:

Section 11.9 indicates that the manufacturer's instructions are to be provided. 11.8.3 wouldallow the contractor to provide handwritten instructions.

ResponseMessage:



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12.2 Fire Department Connections.

The standpipes shall be provided with conspicuously marked and readily accessible fire departmentconnections on the outside of the building at the street level at a location approved by the local firedepartment and shall have at least one standard hose outlet at each floor . [241:8.7.4.2.1]




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Second Revision No. 33-NFPA 14-2015 [ Section No. A.4.4.2.4.1 ]

A.4.4.2.4.1

Partial penetration welds on outlet fitting connections are considered adequate, since there is nosignificant load on the joint other than that caused by pressure internal to the pipe (see FigureA.4.4.2.4.1). [13: A.6.5.2.4.1]

The load due to the internal pressure can be accommodated with a weld that has a conservative weldthroat thickness that can be calculated as follows:

[A.4.4.2.4.1]

where:

P = rated system gauge pressure (psig psi )

D = outside diameter (OD) of the fitting (in.)

[13:A.6.5.2.4.2]

For example: If you assume a pressure of 300 psig psi (21 bar) and the OD [outside diameter] of theoutlet fitting of 3 in. (75 mm) , the result of the thickness calculation is 0.0315 in. (0.8 mm) . Whencompared to the minimum throat thickness of 3⁄16 in. (0.18 in. 5 mm ), there is a factor of more than 5 timesthe calculated thickness value. [13:A.6.5.2.4.2]

Figure A.4.4.2.4.1 Weld Descriptions. [13:Figure A.6.5.2.4.1]




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Second Revision No. 34-NFPA 14-2015 [ Section No. A.5.2.1.4.2 ]

A.5.2.1.4.2

The compressor should draw its air supply from within the operating criteria allowed by the manufacturerof the compressor. Air piping should not be attached to the intake of the compressor unless acceptable tothe compressor manufacturer. Damage, air reduction, or reduced life expectancy can result if guidelinesare not followed. [ 13: A.7.2.6.3]




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Second Revision No. 15-NFPA 14-2015 [ New Section after A.7.3.2.2 ]

A.7.3.2.5

Paragraph 7.3.2.1 requires that a standpipe be provided in each required exit stairwell. Onearrangement that might be found in certain residential buildings is that two remotely located exit stairsprovide the occupants two distinct means of egress. This section allows a single hose connection to belocated anywhere between the exit stairs, provided the exit stairs are open and are located within 75 ft(23 m) of each other. (See Figure A.7.3.2.5 ) .

Figure A.7.3.2.5 Single Hose Valve in Open Stairs/Corridors/Breezeways.



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NFPA_14_Single_Hose_Valve_in_Open_Breezeway.pdf Figure A.7.3.2.5




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Committee Statement

CommitteeStatement:

This section and figure is being submitted on behalf of the Horizontal Exit task group. The taskgroup was assigned the task to create an annex figure for section A.7.3.2.5.

ResponseMessage:

Public Comment No. 17-NFPA 14-2014 [New Section after A.7.3.2.2]


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Second Revision No. 16-NFPA 14-2015 [ Section No. A.7.10.1.2 ]

A.7.10.1.2

See Section 14.4 of NFPA 13.

When performing a hydraulic design, the hydraulic characteristics of each water supply need to be known.The procedure for determining the hydraulic characteristics of permanent water supplies, such as pumps,is fairly straightforward and is described in NFPA 20. The procedure for determining the hydrauliccharacteristics of fire apparatus supplying a standpipe system are similar. Lacking better information aboutlocal fire apparatus, a conservative design would accommodate a 1000 gpm (3785 L/min) fire departmentpumper performing at the level of design specifications set forth in NFPA 1901. NFPA 1901 specifies thatfire department pumpers must be able to achieve three pressure/flow combinations. These are 100percent of rated capacity at 150 psi (1034 kPa) net pump pressure, 70 percent of rated capacity at 200 psi(1379 kPa) net pump pressure, and 50 percent of rated capacity at 250 psi (1724 kPa) net pumppressure. Therefore, a 1000 gpm (3785 L/min) pumper can be expected to deliver no less than 1000 gpm(3785 L/min) at 150 psi (1034 kPa), 700 gpm (2650 L/min) at 200 psi (1379 kPa), and 500 gpm (1893L/min) at 250 psi (1724 kPa). Residual supply pressure on the suction side of a pump from a municipal orother pressurized water supply can also be added. The 150 psi (1034 kPa) suggested pressure is alsofound in NFPA 13E . It also states that this is the pressure to be provided unless the sign at the firedepartment connection states otherwise. It is not the intent of this standard to limit the maximum pumperpressure at the fire department connection inlet for manual or automatic standpipes to 150 psi (1034kPa).

To perform a hydraulic design, one should determine the minimum required pressure and flow at thehydraulically most remote hose connection and calculate this demand back through system piping to eachwater supply, accumulating losses for friction and elevation changes and adding flows for additionalstandpipes and sprinklers at each point where such standpipes or sprinklers connect to the hydraulicdesign path. When considering fire apparatus as a water supply, flows are calculated from system pipingthrough the fire department connection and back through connecting hoses to the pump. If the pressureavailable at each supply source exceeds a standpipe system's pressure demand at the designated flow,the design is acceptable. Otherwise, the piping design or the water supply needs to be adjusted.

The intent of the standard is to require that each vertical standpipe serving two or more hose connectionsbe capable of individually flowing 500 gpm (1893 L/min) and 250 gpm (946 L/min) at each of the twohydraulically most demanding connections at the required residual pressure. Given the requirement in7.10.1.1.3 for the hydraulically most remote standpipe to supply this pressure and flow rate and given theminimum standpipe sizes in Section 7.6, the ability of standpipes that are not hydraulically most remote tosatisfy this requirement is implicit and should not require additional hydraulic calculations.




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Committee Statement

CommitteeStatement:

During the first draft, the committee made it clear that even with automatic standpipes, a calculationto the fire department connection is required. Many AHJ's refer to NFPA 13E which is arecommended practice and cite section 4.3.4 and limit the maximum pressure at the FDC inlet to150 PSI for calculation purposes. This language makes it clear that the 150 psi is not a maximum.


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ResponseMessage:

Public Comment No. 12-NFPA 14-2014 [Section No. A.7.10.1.2]


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Second Revision No. 35-NFPA 14-2015 [ Section No. A.8.2.3 ]


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A.8.2.3


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See Figure A.8.2.3(a) , Figure A.8.2.3(b) , Figure A.8.2.3(c), and Figure A.8.2.3(d) for copies of typicalforms.

Figure A.8.2.3(a) Summary Sheet. [13:23.3.5.1.2(a)]

Figure A.8.2.3(b) Graph Sheet. [13:23.3.5.1.2(b)]


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Figure A.8.2.3(c) Supply and Node Analysis Sheet. [13:23.3.5.1.2(c)]


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Figure A.8.2.3(d) Detailed Worksheet. [13:23.3.5.1.2(d)]


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Committee Statement: Forms are extracted from NFPA 13 and need to align with the current edition.

Response Message:


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Documents

Second Revision No. 20-NFPA 14-2015 [ Section No. 1.4 ] · Second Revision No. 20-NFPA 14-2015 [ Section No. 1.4 ] 1.4* Equivalency. Nothing in this standard is intended to prevent