Adopts With Amendments:

NFPA 13, 2016

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25.1 Approval of Sprinkler Systems and Private Fire Service Mains

Amendment
This section has been amended by the state, county, or city.
The installing contractor shall inspect and test the installation in accordance with the procedures of this chapter prior to scheduling an inspection.

25.2.1.1

Amendment
This section has been amended by the state, county, or city.
Unless permitted by 25.2.1.2 through 25.2.1.5, all piping and attached appurtenances subjected to system working pressure shall be hydrostatically tested at 200 psi (13.8 bar) and shall maintain that pressure without loss for 1 hour.
Portions of systems normally subjected to system working pressures in excess of 150 psi (10.3 bar) shall be tested as described in 25.2.1.1, at a pressure of 50 psi (3.4 bar) in excess of system working pressure.
Where cold weather will not permit testing with water, an interim air test shall be permitted to be conducted as described in 25.2.2. This provision shall not remove or replace the requirement for conducting the hydrostatic test as described in 25.2.1.1.
Modifications to existing piping systems shall require testing at system working pressure.

25.2.1.4.1

Amendment
This section has been amended by the state, county, or city.
Where modification is made to an existing system affecting more than 20 sprinklers, the new portion shall be isolated and tested at not less than 200 psi (13.8 bar) for 1 hour.
Modifications that cannot be isolated, such as relocated drops, shall require testing at system working pressure.
The test pressure shall be read from a gauge located at the low elevation point of the system or portion being tested. The pressures in piping at higher elevations shall be permitted to be less than 200 psi (13.8 bar) when accounting for elevation losses. Systems or portions of systems that can be isolated shall be permitted to be tested separately.
Additives, corrosive chemicals such as sodium silicate, or derivatives of sodium silicate, brine, or similar acting chemicals shall not be used while hydrostatically testing systems or for stopping leaks.

25.2.1.7

Amendment
This section has been amended by the state, county, or city.
Piping between the exterior fire department connection and the check valve in the fire department inlet pipe shall be hydrostatically tested in the same manner as the balance of the system. After repair or replacement work affecting the fire department connection, the piping between the exterior and the check valve in the fire department inlet pipe shall be isolated and hydrostatically tested at 200 psi (13.8 bar).
When systems are being hydrostatically tested, tests shall be permitted to be conducted with pendent or horizontal sidewall sprinklers or plugs installed in fittings. Any plugs shall be replaced with pendent or horizontal sidewall sprinklers after the test is completed.
When deluge systems are being hydrostatically tested, plugs shall be installed in fittings and replaced with open sprinklers after the test is completed, or the operating elements of automatic sprinklers shall be removed after the test is completed.
Provision shall be made for the proper disposal of water used for flushing or testing.
Test blanks shall have painted lugs protruding in such a way as to clearly indicate their presence.
The test blanks shall be numbered, and the installing contractor shall have a recordkeeping method ensuring their removal after work is completed.
When subject to hydrostatic test pressures, the clapper of a differential-type valve shall be held off its seat to prevent damaging the valve.
In addition to the standard hydrostatic test, an air pressure leakage test at 40 psi (2.7 bar) shall be conducted for 24 hours. Any leakage that results in a loss of pressure in excess of 11/2 psi (0.1 bar) for the 24 hours shall be corrected.
Modifications to existing systems shall be tested for air leakage using one of the following test methods:
  1. An air pressure test at 40 psi (2.7 bar) shall be performed for 2 hours.
    1. The system shall be permitted to lose up to 3 psi (0.2 bar) during the duration of the test.
    2. Air leaks shall be addressed if the system loses more than 3 psi (0.2 bar) during this test.
  2. With the system at normal system air pressure, the air source shall be shut off for 4 hours. If the low pressure alarm goes off within this period, the leaks shall be addressed.
Where systems are installed in spaces that are capable of being operated at temperatures below 32°F (0°C), air or nitrogen gas pressure leakage tests required in 25.2.2 shall be conducted at the lowest nominal temperature of the space.
Waterflow detecting devices including the associated alarm circuits shall be flow tested through the inspector's test connection and shall result in an audible alarm on the premises within 5 minutes after such flow begins and until such flow stops.
A working test of the dry pipe valve shall be made by opening the inspector's test connection.
Where a quick opening device is present, the trip test described in 25.2.3.2.1 shall be sufficient to test the quick opening device as long as the device trips properly during the test.
The test shall measure the time to trip the valve and the time for water to be discharged from the inspector's test connection. All times shall be measured from the time the inspector's test connection is completely opened.
Dry systems calculated for water delivery in accordance with 7.2.3.6 shall be exempt from any specific delivery time requirement.
The results shall be recorded using the contractor's material and test certificate for aboveground piping (see Figure 25.1) and the general information sign (see Figure A.25.6).
The automatic operation of a deluge or preaction valve shall be tested in accordance with the manufacturer's instructions.
The manual and remote control operation, where present, shall also be tested.
The main drain valve shall be opened and remain open until the system pressure stabilizes.
The static and residual pressures shall be recorded on the contractor's material and test certificate (see Figure 25.1) and the sprinkler system general information placard (see Figure A.25.6).
Operating Test for Control Valves. All control valves shall be fully closed and opened under system water pressure to ensure proper operation.
Each pressure-reducing valve shall be tested upon completion of installation to ensure proper operation under flow and no-flow conditions.
Testing shall verify that the device properly regulates outlet pressure at both maximum and normal inlet pressure conditions.
The results of the flow test of each pressure-reducing valve shall be recorded on the contractor's material and test certificate (see Figure 25.1).
The results shall include the static and residual inlet pressures, static and residual outlet pressures, and the flow rate.
The backflow prevention assembly shall be forward flow tested to ensure proper operation.
The minimum flow rate shall be the system demand, including hose stream allowance where applicable.
Operating tests shall be made of exposure protection systems upon completion of the installation, where such tests do not risk water damage to the building on which they are installed or to adjacent buildings.

25.3 Circulating Closed Loop Systems

Amendment
This section has been amended by the state, county, or city.

25.3.1

Amendment
This section has been amended by the state, county, or city.

25.3.2

Amendment
This section has been amended by the state, county, or city.

25.3.3

Amendment
This section has been amended by the state, county, or city.

25.3.4

Amendment
This section has been amended by the state, county, or city.
The installing contractor shall provide the property owner or the property owner's authorized representative with the following:
  1. All literature and instructions provided by the manufacturer describing proper operation and maintenance of any equipment and devices installed
  2. NFPA 25
The installing contractor shall identify a hydraulically designed sprinkler system with a permanently marked weatherproof metal or rigid plastic sign secured with corrosion- resistant wire, chain, or other approved means. Such signs shall be placed at the alarm valve, dry pipe valve, preaction valve, or deluge valve supplying the corresponding hydraulically designed area.

25.5.2

Amendment
This section has been amended by the state, county, or city.
The sign shall include the following information:
  1. Location of the design area or areas
  2. Discharge densities over the design area or areas
  3. Required flow and residual pressure demand at the base of the riser
  4. Occupancy classification or commodity classification and maximum permitted storage height and configuration
  5.  
The installing contractor shall provide a general information sign used to determine system design basis and information relevant to the inspection, testing, and maintenance requirements required by NFPA 25.
Such general information shall be provided with a permanently marked weatherproof metal or rigid plastic sign, secured with corrosion-resistant wire, chain, or other acceptable means.
Such signs shall be placed at each system control riser, antifreeze loop, and auxiliary system control valve.

25.6.2

Amendment
This section has been amended by the state, county, or city.
The sign shall include the following information:
  1. Name and location of the facility protected
  2. Occupancy classification
  3. Commodity classification
  4. Presence of high-piled and/or rack storage
  5. Maximum height of storage planned
  6. Aisle width planned
  7. Encapsulation of pallet loads
  8. Presence of solid shelving
  9. Flow test data
  10. Presence of flammable/combustible liquids
  11. Presence of hazardous materials
  12. Presence of other special storage
  13. Location of auxiliary drains and low point drains on dry pipe and preaction systems
  14. Original results of main drain flow test
  15. Original results of dry pipe and double interlock preaction valve test
  16. Name of installing contractor or designer
  17. Indication of presence and location of antifreeze or other auxiliary systems
  18. Where injection systems are installed to treat MIC or corrosion, the type of chemical, concentration of the chemical, and where information can be found as to the proper disposal of the chemical
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