NFPA 1965 Fire Hose Appliances

This standard shall cover the requirements for fire hose appliances up to and including 6 in. (150 mm) nominal dimension designed for connection to fire hose, fire appara­tus, and fire hydrants and intended for general fire service use in controlling or conveying water.

1.2 Purpose. The purpose of this standard shall be to provide minimum performance and operational requirements for fire hose appliances and to specify the design verification tests for fire hose appliances.

1.3* Application. This standard shall apply to fire hose appli­ances up to and including 6 in. (150 mm) manufactured after the effective date of this standard. Fire hose appliances shall include the following:

• Portable valves, including gate valves, ball valves, piston valves, butterfly valves, clappered valves, and pressure re­lief valves
• Portable monitors, ladder pipes, and break-apart moni­tors
• Miscellaneous hose appliances, including wyes, siameses, elbows, water curtains, water thieves, and manifolds

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

1.5* Units of Measurement. In this standard, values for mea­surement in U.S. customary units are followed by an equiva­lent in SI units. Either set of values can be used, but the same set of values (either U.S. customary or SI units) shall be used throughout.

Referenced Publications

• The documents or portions thereof listed in this chapter are referenced within this standard and shall be con­sidered part of the requirements of this document.
• NFPA Publications. National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169-7471.
• Other Publications.
• ASTM Publications. ASTM International, 100 Barr Har­bor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959.
• Other Publications.
• References for Extracts in Mandatory Sections.
• The definitions contained in this chapter shall apply to the terms used in this standard. Where terms are not defined in this chapter or within another chapter, they shall be defined using their ordinarily accepted meanings within the context in which they are used. Merriam-Webster’s Collegiate Dictionary, 11th edition, shall be the source for the ordinarily acceptecl meaning.
• NFPA Official Definitions.

3.2.1* Approved. Acceptable to the authority having jurisdic­tion.

3.2.2* Authority Having Jurisdiction (AHJ). An organization, office, or individual responsible for enforcing the require­ments of a code or standard, or for approving equipment, materials, an installation, or a procedure.

• Indicates a mandatory requirement.
• Indicates a recommendation or that which is advised but not required.

General Definitions.

• Break-Apart Monitor. See3.5.1.
• Fire Hose Appliance. A piece of hardware (excluding nozzles) generally intended for connection to fire hose to con­trol or convey water.
• Ladder Pipe. A monitor that attaches to the rungs of a vehicle-mounted aerial ladder.
• Maximum Operating Pressure. The maximum pressure at which the device is designed to be operated.
• A device designed to hold and direct a nozzle while being fed by one or more hose lines or by rigid piping.
• Break-Apart Monitor. A monitor that can be con­verted for use either in stationary mode on a fire apparatus or in portable mode on a separate ground base.
• Portable Monitor. A monitor that can be lifted from a vehicle-mounted bracket and moved to an operating po­sition on the ground by not more than two people.

3.3.6* Nozzle. A constricting appliance attached to the end of a fire hose or monitor to increase the water velocity and form a stream.

• Portable Monitor. See 3.3.5.2.
• Portable Valve. See 3.3.11.1.
• Shutoff Valve. See3.11.2.
• Slow-Operating Valve. See3.11.3.

3.3.11.1 Portable Valve. A fire hose appliance that includes at least one valve and has fire hose connections on both inlet(s) and outlet(s).

3.3.11.2* Shutoff Valve. A valve whose primary function is to operate in either a fully shutoff or a fully open condition.

3.3.11.3 Slow-Operating Valve. A valve that has a mecha­nism to prevent movement of the flow-regulating element from the fully closed position to the fully opened position or vice versa in less than 3 seconds. [1901, 20091

Operational Design Requirements for All Fire Hose Appliances

4.1* Maximum Operating Pressure. The maximum operating pressure shall be a minimum of 200 psi (13.8 bar).

4.2 Appliance Connectors.

4.2.1 All fire hose couplings on the appliance shall meet the requirements of NFPA 1963, Standard for Fire Hose Connections.

4.2.2* All fire hose connectors on an appliance shall conform to NFPA 1963, Standard for Fire Hose Connections. If the hose threads or connectors used by the fire department do not con­form to NFPA 1963, the authority having jurisdiction shall be permitted to designate the hose threads or connectors that shall be used.

4.2.3 If the hose connector(s) on the appliance is equipped with a full-time swivel, the force required to rotate the swivel shall not exceed 30 lb_f (133.4 N) when tested in accordance with Section 6.1.

Manually Operated Shutoff Valves.

• Shutoff valves or appliances equipped with a lever- operated handle shall indicate the closed position when the handle is perpendicular to the hose line it is controlling.
• If an appliance has more than two valves with lever- operated handles, the two outside handles shall indicate their closed position as described in3.1.
• If the design of the appliance does not permit the intervening handle(s) to indicate the closed position perpen­dicular to the hose, it shall be permitted to indicate the closed position when the handle(s) is at the 2 o’clock position when viewed from the single hose connection side.
• Any valve arranged as permitted in 4.3.2.1 shall be per­manently marked to indicate the open and closed positions.
• Shutoff valves equipped with a U-shaped handle shall indicate the closed position when the handle is closer to the discharge end of the valve.
• Operating a shutoff valve shall require a force of no more than 40 lb, (180 N) and no less than 3 lb, (13 N) to open or close the valve when tested in accordance with Section 6.2.
• Any 3 (76 mm) or larger shutoff valve on an appli­ance shall be a slow-operating valve.

4.4* Relief Valves. If the appliance has a relief valve, the relief valve shall meet the requirements of this section.

• The relief valve shall be on the intake side of the shutoff valve.
• The relief valve shall relieve to atmosphere.
• The relief valve shall be field adjustable.
• The manufacturer shall mark the range of pressure ad­justment on the relief valve.
  • • If the appliance is equipped with a shutoff valve on the discharge side of the appliance, the appliance shall not de­velop in excess of 12 drops/min (Vi mL/min) through the discharge orifice of the valve when tested in accordance with Section 6.3.
    • There shall be no leakage through any part of the ap­pliance other than the discharge orifice of a shutoff valve on the discharge side of the appliance when tested in accordance with Section 6.3.
  • Rough Usage.
    • Section 4.6 shall not apply to portable monitors.
    • The appliance shall be capable of operation after being subjected to the rough usage tests in Section 6.4.
    • Any operating force shall not increase more than 10 percent from that allowed before the test.
    • Following performance of the test to confirm compli­ance with 4.6.3, the test sample shall again be subjected to the leakage test defined in Section 6.3.

OPERATIONAL DESIGN REQUIREMENTS FOR ALL FIRE HOSE APPLIANCES

• The leakage shall not increase by more than 10 percent from that allowed before the test.

• Requirements for Portable Monitors.

4.7.1* A portable monitor, except a portable ladder pipe, shall have an attachment for at least one tiedown.

• Portable ladder pipes shall have rung attachment mechanisms with multiple motion-locking devices.
• The monitor shall be provided with stops to prevent it from being lowered to an angle of discharge or rotated to a point where the monitor becomes unstable.
• A locking methods) shall be provided that will hold the elevation of the monitor in any position allowed by the manu­facturer.
• A locking method shall be provided that will hold the rotation of the monitor in any position allowed by the manu­facturer.
• Any shutoff valves incorporated in a monitor shall meet the requirements of Section 4.3.
• All swivel hose connections 3’/2 in. (90 mm) or larger shall have a full-time swivel.
• Force to Operate.
• The force to rotate a monitor shall be not less than 3 lb, (13 N) nor more than 40 lb, (180 N) when measured as defined in Section 6.5.
• The force to elevate the stream of a monitor shall be not more than 40 lb, (180 N) when measured as defined in Section 6.6.
• The monitor shall be capable of operation through all positions of elevation and rotation allowed by the manufac- turerwithout any movement of the monitor’s feet when tested in accordance with Section 6.7.
• Rough Usage.
• The monitor shall remain operational and not leak or come apart after being subjected to the rough usage test described in Section 6.8.
• Any operating force shall not increase by more than 10 percent from that allowed before the test.
• Following performance of the test to confirm com­pliance with 4.7.10.2, the test sample shall again be subjected to the leakage test described in Section 6.3. The leakage shall not increase by more than 10 percent from that allowed be­fore the test.
• The rated flow of the monitor shall be permanently identified on the monitor in conformance with 4.9.1 and near the marking of the maximum operating pressure.
  • Connections for Large-Stream Devices.

4.8.1 * Primary Inlet. At least one inlet connection on each fire department large-stream device equipped with multiple pri­mary inlets (other than devices piped permanently to a pump) shall be fitted with at least one female swivel connection, which shall have 2.5-7.5 NH standard thread as shown in Fig­ure 4.8.1 (a) and Figure 4.8.1 (b). An adapter shall be permit­ted to be provided to meet this intent.

4.8.2* Subsequent Connecdons and Nozzles.

4.8.2.1 The discharge end of large-stream devices designed to flow from 400 gpm to 1250 gpm (1600 L/min to 5000 L/min)

shall have the 2.5-7.5 NH thread for attaching straight tip nozzle tips or spray nozzles.

• If stacked straight tip nozzles are used, one of the tips shall have the 1.5-9 NH thread as shown in Figure 4.8.1 (a).
• Straight tip nozzles and spray nozzles designed to flow from 400 gpm to 1250 gpm (1600 L/min and 5000 L/min) shall have 2.5-7.5 NH thread on their inlet.
• The discharge end of large-stream devices designed to flow more than 1250 gpm (5000 L/min) but less than 3000 gpm (12,000 L/min) shall have the 3.5-6 NH thread for attaching straight tip nozzles or spray nozzles.
• A 3.5-6 NH female x 2.5-7.5 NH male reducer fitting or a stacked tip having the male 2.5-7.5 NH thread as an integral component as shown in Figure 4.8.1 (b) shall be provided.
• Straight tip nozzles and spray nozzles designed to flow more than 1250 gpm (5000 L/min) but less than 3000 gpm (12,000 L/min) shall have 3.5-6 NH thread on their inlet.

Stacked tips 1% in., 1 Vz in., 1% in. (34.9 mm, 38 mm, 44 mm)

• Subsequent connections, straight tip nozzles, and spray nozzles on large-stream devices designed to flow 3000 gpmm

Markings.

• Each fire hose appliance shall be permanently identi­fied with the following information using numerals and letters not less than Vie in. (4.8 mm) in height:
  • Name of manufacturer
  • Unique product or model designation
  • Maximum operating pressure
  • For monitors, maximum rated flow
• The information on the maximum operating pressure shall be visible to the operator when the appliance is in its normal operating position.

Construction Materials

• Hydrostatic Strength.
• The appliance shall withstand a hydrostatic gauge pres­sure of 900 psi (62.1 bar) or three times the maximum operat­ing pressure, whichever is higher, when tested in accordance with Section 6.9.
• Following the test, no part of the appliance shall be cracked or ruptured, and the appliance shall be fully capable of operation.
• Operating forces and leakage shall not increase by more than 10 percent from that allowed before the test.
• High and Low Temperature Exposure. The appliance shall be capable of operation and there shall be no cracks or broken sections after it has been tested to a high temperature of 135°F (57°C) and then to a low temperature of -25°F (-32°C) in accordance with Section 6.10.
• Corrosion Exposure.

5.3.1* All appliances shall be capable of operation after they have been subjected to a salt spray test in accordance with Section 6.11.

5.3.2 If the appliance has a valve(s), operating forces and leakage shall not increase by more than 10 percent from that allowed before the test.

• Ultraviolet Light and Water Exposure of Nonmetallic Ap­pliance Components.
• An appliance with exposed nonmetallic parts shall have those components subjected to the ultraviolet light and water test as described in Section 6.12.
• Cracking or crazing of the nonmetallic components shall indicate failure of the test.
• Aging Exposure of Nonmetallic Appliance Components.
• An appliance with nonmetallic components other than rubber gaskets where an appliance connects to a hose line shall be subjected to the air-oven aging test as described in Section 6.13.
• The appliance shall then be subjected to a rough usage test in accordance with Section 6.4 if the appliance is not a portable monitor or in accordance with Section 6.8 if the ap­pliance is a portable monitor.
• At the conclusion of the test, the appliance shall be inspected for cracking or crazing.
• Cracking or crazing shall indicate failure of the test.
• Moist Ammonia-Air Stress Cracking.
• Appliances or components made from copper alloys containing more than 15 percent zinc shall be tested in accor­dance with Section 6.14.
• The appliance or component shall show no evidence of cracking when examined using 25X magnification following exposure to the moist ammonia-air mixture.
• Rubber Sealing Materials.
• A rubber material or synthetic elastomer used to form a seal shall have the properties described in 5.7.1.1 through 5.7.1.4 in the as-received condition.
• Silicone rubber (rubber having polyorganosiloxane as its characteristic constituent) shall have a tensile strength of not less than 500 psi (3.45 MPa) and at least 100 percent ulti­mate elongation, determined in accordance with Section 6.15.
• Material other than silicone rubber shall have a ten­sile strength of not less than 1500 psi (10.34 MPa) and at least 200 percent ultimate elongation.
• A tensile set of the material shall not be more than 19 percent, determined in accordance with Section16.
• A compression set of the material shall not be more than 25 percent, determined in accordance with Section17.
• A rubber material or synthetic elastomer used to form a seal shall have not less than 80 percent of the as-received ten­sile strength and 50 percent of the as-received ultimate elon­gation after it has been through the accelerated aging test in accordance with Section 6.18.

Full-Time Swivel Test.

• An appliance equipped with a full-time swivel on the hose connection shall be tested while it is dry.
• The appliance shall be mounted in a device capable of holding the appliance stationary.
• The coupling shall have a hook or other device added in a manner that will allow an attached dynamometer to apply force tangentially.
• The force required to rotate the coupling shall be ap­plied tangentially with a dynamometer, which records the maximum force reading.
• The force shall be recorded.

Test of Handles on Manually-Operated Shutoff Valves.

• The appliance or the valve used with the appliance shall be mounted in a device capable of holding the appliance or valve stationary.
• A dynamometer, which records the maximum force read­ing, shall be attached to the outermost point of the handle.
• With the valve in the closed position, an inlet gauge pressure of 100 psi (6.9 bar) shall be applied to the valve.
• The dynamometer shall be used to measure the force to move the handle from the fully closed position to the fully open position, and the maximum force shall be recorded.
• The inlet pressure shall be adjusted to a gauge pressure of 100 psi (6.9 bar) while the valve is in the fully open position.
• If the outlet of the valve is 1 in. (25.4 mm) or less, the flow shall be whatever flow rate is achieved with the inlet pres­sure at 100 psi (6.9 bar).
• If the outlet of the valve is greater than 1 in. (25.4 mm), the flow shall be at least 250 gpm (946 L/min) with the inlet pressure at 100 psi (6.9 bar). A nozzle or restricting orifice shall be permitted to be used downstream of the valve to regulate the flow.
• The dynamometer shall be used to measure the force to move the handle from the fully open position to the fully closed position, then back to the fully open position.
• The maximum force measured in both directions shall be recorded.
• The valve shall be fully closed without any inlet pressure on the valve.
• The dynamometer shall be used to measure the force to move the handle from the fully closed position to the fully open position.
• The maximum force measured in both directions shall be recorded.
• Leakage Test.
• The appliance shall be connected to a source of water.
• If the appliance is equipped with a shutoff valve on the discharge side of the appliance, the valve shall be closed and all the air bled out.
• If the appliance is not equipped with a shutoff valve on the discharge side of the appliance, the discharge side of the appliance shall be capped and all the air bled out.
• The appliance shall be pressurized to a gauge pressure of 800 psi (55.2 bar) or 1 Vi times the maximum operating pressure, whichever is higher, and held for a period of 1 minute.
• The leakage, if any, shall be measured.
• Rough Usage Test.
• A cap shall be attached to each male threaded connec­tion on the appliance to protect the exposed threads.
• If the appliance weighs less than 10 lb (4.54 kg), the appliance shall be dropped from a height of 6 ft (2 m) onto a concrete surface so that it impacts directly or squarely on each side and on the top and the bottom (a minimum of six drops).
• If the appliance weighs 10 lb (4.54 kg) or more, the appliance shall be dropped from a height of 3 ft (1 m) onto a concrete surface so that it impacts directly or squarely on each side and on the top and the bottom (a minimum of six drops).
• Force-to-Rotate Test.

6.5.1 The monitor shall be mounted in a device capable of holding its base stationary. A dynamometer, which records the maximum force reading, shall be attached to the monitor where a person would normally grab the monitor to rotate it.

• The monitor shall be (lowing water at its maximum rate of flow at a nozzle discharge pressure of 100 psi (6.9 bar) through a smooth bore tip.
• The dynamometer shall be used to measure the force when the monitor is rotated first in one direction and then in the other direction. The maximum force in both directions shall be recorded.
• Force-to-Elevate Test.
• The monitor shall be mounted in a device capable of holding its base stationary. A dynamometer shall be attached to the monitor where a person would normally grab the moni­tor to elevate it.
• The monitor shall be flowing water at its maximum flow rate at a nozzle discharge pressure of 100 psi (690 kPa) through a smooth bore tip.
• The dynamometer shall be used to measure the force when the monitor is elevated from its lowest position to its maximum elevation. The maximum force shall be recorded.
• Stability Test for Portable Monitors.
• Test Setup.
• The monitor shall be set up in accordance with the manufacturer’s instructions on a concrete surface with a broom finish.
• The position of the feet shall be marked on the sur­face so that any movement can be detected.
• The monitor shall be attached to asecure tiedown point with an attachment that has approximately 6 in. (150 mm) of slack.
• The attachment shall have a rated strength of at least twice the maximum test reaction force.
• The hose supplying the monitor shall be charged and any slack removed from the hose.
• The monitor shall be equipped with a smooth bore nozzle that is capable of flowing the rated flow of the monitor at 100 psi (6.9 bar) discharge pressure.
• The monitor shall be positioned to discharge the stream at the maximum elevation position.
• Test Procedure.
• A water flow shall be established at a nozzle discharge pressure of 150 psi (10.4 bar).
• The monitor shall then be operated through all posi­tions of elevation and rotation allowed by the manufacturer.
• The monitor shall be operated for a minimum of 3 minutes.

6.8.1 The assembled monitor shall have caps and plugs in­stalled to protect any threaded connection.

• The legs shall be extended and die monitor shall be dropped from a height of 3 ft (1 m) onto a concrete surface so that it impacts directly on a support leg.
• The monitor shall continue to be dropped from a height of 3 ft (1 m) onto a concrete surface until it has been dropped on each supporting leg.
• The monitor shall then be dropped from the same height onto the discharge end and the intake end of the appli­ance.
• If the monitor is of a break-apart design, it shall be disassembled and each piece dropped on the break-apart point.
• Following these drops, the monitor shall be inspected to be sure that it will still rotate and elevate and that all com­ponents are still attached and operational as designed by the manufacturer.
• The monitor shall be flow tested and shall remain op­erational and not leak or come apart.
• Hydrostatic Test.
• The appliance shall be connected to a hydrostatic test pump capable of exerting a gauge pressure of 900 psi (62.1 bar) or three times the maximum operating pressure, which­ever is higher.
• Test caps capable of withstanding the required hydro­static pressure shall be attached to the appliance openings, and all valves shall be placed in the fully open position.
• All air shall be bled out of the system.
• The gauge pressure shall be increased by 50 psi (3.5 bar) increments and held for 30 seconds at each pressure up to the maximum pressure for which the appliance is being tested.
• This maximum pressure shall be held for 1 minute.
• High and Low Temperature Test.
• The appliance shall be conditioned in a heating cham­ber to 135°F (57°C) for 24 hours.
• Immediately after being removed from the heating chamber, all adjustments and controls on the appliance shall be operated.
• There shall be no binding of any adjustment or con­trol.
• The appliance shall then be conditioned in a cooling chamber to -25°F (-32°C) for 24 hours.
• Immediately after being removed from the cooling chamber, all adjustments and controls on the appliance shall be operated.
• There shall be no binding of any adjustment or control.
• Within 3 minutes after being removed from the cool­ing chamber, the appliance shall be subjected to the rough usage test.
• All appliances other than portable monitors shall be tested in accordance with Section 6.4.
• Portable monitors shall be tested in accordance with Section 6.8.

6.10.8 The appliance shall then be hydrostatically tested in accordance with Section 6.9.

• Salt Spray Test. A test sample shall be supported verti­cally and exposed to salt spray (fog) for 120 hours, following the procedures specified byASTM B117, Standard Practice for Operating Salt Spray (Fog) Apparatus.
• Ultraviolet Light and Water Test.
• The test components shall be exposed to ultraviolet light and water for 720 hours using the process described in either 6.12.2 or 6.12.3.
• The test components shall be inspected for cracking and crazing after 360 hours.
• If no cracking or crazing is apparent, the exposure shall continue for the full 720 hours.
• Carbon-Arc Lamp Source.
• Ultraviolet light shall be obtained from two station­ary enclosed carbon-arc lamps.
• The arc of each lamp shall be formed between two vertical carbon electrodes, ^XA in. (12.7 mm) in diameter, lo­cated at the center of a revolving vertical metal cylinder 31 in. (787 mm) in diameter and 17% in. (451 mm) in height.
• Each arc shall be enclosed with a number 9200 PX clear Pyrex™ glass globe.
• The test components shall be mounted vertically on the inside of the metal cylinder and revolved continuously around the stationary arcing lamps at 1 rpm.
• A system of nozzles shall be provided so that, dur­ing each operating cycle, the samples shall be exposed to the light and to water spray for 3 minutes and to only the light for 17 minutes (total 20 minutes).
• The air temperature within the revolving cylinder of the apparatus during the test shall be 145°F ± 9°F (63°C ±5°C).
• Xenon-Arc Lamp Source.
• The ultraviolet light exposure shall be obtained in accordance with ASTM D2565, Standard Practice for Xenon Arc Exposure of Plastics Intended for Outdoor Applications.
• The source of radiation shall be a 6500 W, water- cooled xenon-arc lamp with borosilicate inner and outer opti­cal filters.
• The wattage to the lamp shall be controlled automati­cally to provide spectral irradiance of 0.0325 W/ft² (0.35 W/m²) at 0.000014 in. (340 nm).
• The samples shall be mounted vertically on the in­side of a 38 in. (97 cm) diameter cylinder, facing the arc, and the cylinder shall be rotated about the arc at 1 rpm.
• During each operating cycle of 120 minutes, each sample shall be exposed to light for 102 minutes and to light and water spray for 18 minutes.
• The black-panel temperature during the dry portion of the light-on cycle shall be regulated to 145°F ± 9°F (63°C ± 5°C).
• At the conclusion of the test, the components shall be inspected for cracking or crazing.
• Air-Oven Aging Test. A sample appliance (s) shall be sub­jected to air-oven aging for 180 clays at 212°F (100°C) and then allowed to cool at least 24 hours in air at 74°F (23°C) at 50 percent relative humidity.
• Moist Ammonia-Air Stress Cracking Test.
• A sample appliance shall be subjected to the physical stresses normally imposed on or within the appliance as the result of assembly with other components or a coupling.
• Such stresses shall be applied to the sample prior to the test and maintained during the test.
• The sample shall be connected to a mating coupling and tightened to the minimum torque necessary to produce a leaktight assembly.
• The sample shall be degreased, supported by an inert tray in a glass chamber with a glass cover 1 14 in. (38 mm) above an aqueous ammonia solution, and then continuously exposed for 240 hours in a set position to a moist ammonia- air mixture.
• Approximately 0.16 gal (600 ml) of aqueous ammo­nia having a specific gravity of 0.94 shall be maintained in the glass chamber per cubic foot of container volume.
• The moist ammonia-air mixture in the chamber shall be maintained at atmospheric pressure and at a tempera­ture of 93°F (34°C).
• Tensile Strength and Ultimate Elongation Tests.
• Tensile strength and ultimate elongation shall be de­termined in accordance with ASTM D412, Standard Test Meth­ods for Vulcanized Rubber and Thermoplastic Elastomers — Tension, Method A.
• If a specimen breaks outside the benchmarks, or if either the measured tensile strength or the ultimate elongation of the specimen is less than the required value, an additional specimen shall be tested, and those results shall be final.
• Results of tests for specimens that break in the curved portion just outside the benchmarks shall be permitted to be accepted if the measured strength and elongation values are within the minimum requirements.
• Tensile Set Test.
• Tensile set shall be determined in accordance with ASTM D412, Standard Test Methods for Vulcanized Rubber and Ther- moplastk Elastomers — Tension, Method A, except that the elonga­tion shall be maintained for only 3 minutes, and the tensile set shall be measured 3 minutes after release of die specimen.
• The elongation of the specimen for a tensile set deter­mination shall be such that the 1 in. (25.4 mm) spacing of the benchmarks increases to 3 in. (76.2 mm).
• Compression Set Test.
• Type I specimens of the material shall be prepared and the test conducted in accordance with ASTM D395, Standard Test Metlwds for Rubber Property— Compression Set, Method B.
• The specimens shall be exposed for 22 hours at 70°F ± 2°F (21°C ± 1°C).

Accelerated Aging Test.

• Specimens shall be prepared in the same manner as for tensile strength and ultimate elongation tests, except that benchmarks spaced 1 in. (25.4 mm) apart shall be stamped on the specimens after the test exposure.

Compliance Testing

7.1* Certification. Performance of the appliance to the re­quirements of this standard shall be certified by a testing labo­ratory or by the manufacturer.

• Sample Selection.

7.2.1 A minimum of one completely assembled appliance shall pass each required test.

7.2.2* Multiple appliances shall be permitted to be used dur­ing the testing process.

• If the appliance is equipped with a shutoff valve(s), the same appliance that is initially used to evaluate the re­quirements of Section 4.3 shall be used for the rough usage evaluation (see Section 4.6 and 4.7.10).
• The same appliance that is used to test the high tem­perature exposure shall be used to test the low temperature exposure following the procedures defined in Section10.

7.2.3 Any appliance or appliance components that have been subjected to the destructive tests to prove compliance with the requirements of this standard shall be considered unsuitable for in-service use.

• Test Results.
• The manufacturer shall keep the test results on file.
• Copies shall be provided to the purchaser when re­quested by the purchaser.
• Design Changes. Any changes to the design of the appli­ance or in the materials of construction shall be cause for retesting.