1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMay 5, 20171UL 246BOutline of Investigation for Tamper Resistant Features of Hydrants forFire-Protection ServiceIssue No. 2May 5, 2017Summary of TopicsThis second issue of the Outline of Investig
2、ation for Tamper ResistantFeatures of Hydrants for Fire-Protection Service, UL 246B, coversTransition from Carbon Arc to Xenon Arc.ULs Outlines of Investigation are copyrighted by UL LLC. Neither a printed norelectronic copy of an Outline of Investigation should be altered in any way. All ofULs Outl
3、ines of Investigation and all copyrights, ownerships, and rights regardingthose Outlines of Investigation shall remain the sole and exclusive property of ULLLC.COPYRIGHT 2017 UL LLCUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMAY 5, 2017UL
4、246B2No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .42 Components 43 Units of Measurement .44 Undated References 4CONSTRUCTION5 Design Features 5PERFORMANCE6 Attack Test .57 Normal Operation Te
5、st 68 Variable Ambient Test .69 Corrosion Exposure Tests 69.1 General .69.2 Salt spray (fog) .69.3 Moist hydrogen sulfide (H2S) air mixture 79.4 Moist carbon dioxide (CO2)-sulfur dioxide (SO2) air mixture 710 Ultraviolet Light and Water Exposure Test 711 Gaskets and Seals used in Tamper Resistant Fe
6、atures 812 Dust Test .813 Humidity Test .814 Endurance Test 915 External Icing Test .9MARKING16 General 10MAY 5, 2017 UL 246B 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 This Outline covers requirements for evaluati
7、ng the tamper resistant features of fire hydrants thathave been evaluated and comply with all applicable requirements of the Standard for Hydrants for FireProtection Service, UL 246.2 Components2.1 Except as indicated in 2.2, a component of a product covered by this Outline of Investigation shallcom
8、ply with the requirements for that component.2.2 A component is not required to comply with a specific requirement that:a) Involves a feature or characteristic not required in the application of the component in theproduct covered by this Outline of Investigation; orb) Is superseded by a requirement
9、 in this Outline of Investigation.2.3 A component shall be used in accordance with its rating established for the intended conditions ofuse.2.4 Specific components are incomplete in construction features or restricted in performance capabilities.Such components are intended for use only under limite
10、d conditions, such as certain temperatures notexceeding specified limits, and shall be used only under those specific conditions.3 Units of Measurement3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory orapproximate information.4 Undated References4.1 An
11、y undated reference to a code or standard appearing in the requirements of this standard shall beinterpreted as referring to the latest edition of that code or standard.MAY 5, 2017UL 246B4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONSTRU
12、CTION5 Design Features5.1 Tamper resistant features of a hydrant shall be designed such that they do not result in a significantdelay of the intended operation of the hydrant or allow access by breaching the body. See clause 7,Normal Operation Test and clause 6, Attack Test.PERFORMANCE6 Attack Test6
13、.1 A hydrant with tamper resistant features shall, for a period of 5 minutes:a) For Wet Barrel Hydrants, not permit removal of the caps and not permit operation of thehydrant to begin; or permit making a hole opening in any surface of the hydrant using the toolsspecified in 6.4 and 6.5, orb) For Dry
14、 Barrel Hydrants, not permit removal of the caps and not permit operation of thehydrant to begin or; not permit making a hole opening in any surface of the hydrant using thetools specified in 6.4 and 6.5 and not permit operation of the hydrant to begin.6.2 A hole size opening referenced in 6.1 is de
15、fined as an opening that is 1 inches (25.4 mm) in diameteror larger, or an opening through which a 1 inch (25.4 mm) diameter sphere would pass.6.3 Several separate attacks shall be permitted to be conducted against the hydrant. The attacks arepermitted to be directed against the caps, the body, the
16、locking mechanism, and any part of the hydrantabove the indicated “bury” line.6.4 The hand tools permitted to be used in the attack tests include hammers, chisels, pry bars, punches,screwdrivers, and wrenches (adjustable, socket and fixed open and closed-end type). The hammers shallnot exceed 3 poun
17、ds (1.36 kg) in head weight, and no hand tool is to exceed 18 inches (457 mm) inlength.6.5 The power tool permitted to be used in the attack tests shall be a variable speed electric drill withcarbide tip and high-speed drill bits not exceeding 1/4 inch (6.4 mm) diameter.6.6 The hydrant shall be posi
18、tioned as intended for use, and the attack performed by one operator whois familiar with its construction. Only the components in the location above the indicated “bury line” of thehydrant shall be subjected to the attack procedure.6.7 After being subjected to the conditions described in 6.2 6.6, a
19、hydrant shall not be required tofunction.MAY 5, 2017 UL 246B 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL7 Normal Operation Test7.1 The hydrant with tamper resistant features shall be able to be operated as intended using the hydrantwrenc
20、h provided by the manufacturer from the fully closed position to the fully opened position and backto the fully closed position without delaying operation of the hydrant in excess of 30 seconds. Anyindividual hydrant cap shall be able to be removed without a delay in excess of 30 seconds.7.2 The hyd
21、rant shall be mounted in the intended manner, in accordance with the manufacturersinstallation instructions.8 Variable Ambient Test8.1 A hydrant shall comply with the Normal Operation Test, clause 7, after the tamper resistant featuresare exposed to ambient temperatures of minus 35 and plus 66C (min
22、us 31 and plus 151F).8.2 A sample device shall be conditioned at the temperatures specified in 8.1 for a minimum of 4 hoursand subjected to the Normal Operation Test.9 Corrosion Exposure Tests9.1 General9.1.1 A hydrant shall comply with the Normal Operation Test after the tamper resistant features a
23、reexposed to the Salt Spray (fog) described in 9.2, the Moist hydrogen sulfide (H2 S) - air mixture in 9.3and the Moist carbon dioxide (CO2)-sulfur dioxide (SO2)-air mixture in 9.4 for 30 days.9.1.2 One sample hydrant or the tamper resistant assembly shall be individually exposed to each of thefollo
24、wing atmospheres. If tamper resistant assemblies are used, they shall be re-installed in a hydrantprior to the Normal Operation Test.9.2 Salt spray (fog)9.2.1 The apparatus for salt spray (fog) testing is to consist of a fog chamber having inside dimensionsof 48 by 30 by 36 inches (1.2 by 0.8 by 0.9
25、 m), a salt-solution reservoir, a supply of conditionedcompressed air, a dispersion tower that produces a salt fog, constructed in accordance with the Standardfor Method of Salt Spray (Fog) Testing, ASTM B117, sample supports, provision for heating the chamber,and necessary means of control.9.2.2 Th
26、e dispersion tower is to be located in the center of the chamber and shall be supplied withhumidified air at a pressure of 17 to 19 psig (117 to 131 kPa) so that the salt solution is aspirated as afine mist or fog into the interior of the chamber.9.2.3 The salt solution is to consist of 5 percent by
27、 weight of common salt sodium chloride (NaCl) anddistilled water. The pH value of the collected solution shall be between 6.7 and 7.2, at a specific gravityof 1.0255 to 1.0400 at 25C (77F). The temperature of the chamber shall be maintained at 35 plus 1 orminus 2C (95 plus 2 or minus 3F) throughout
28、the test.MAY 5, 2017UL 246B6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL9.2.4 Drops of solution that accumulate on the ceiling or cover of the chamber shall be diverted fromdropping onto the samples and drops of solution that fall from sam
29、ple are not to be re-circulated but areto be removed by a drain located at the bottom of the chamber.9.3 Moist hydrogen sulfide (H2S) air mixture9.3.1 The test sample shall be supported in a closed chamber having openings for gas inlet and outlet.9.3.2 Hydrogen sulfide (H2S) shall be supplied to the
30、 test chamber from a commercial cylinder containingthis gas under pressure. An amount of hydrogen sulfide equivalent to 1 percent of the volume of the testchamber shall be introduced into the chamber each working day, but prior to the introduction of the gaseseach day, the gas remaining from the pre
31、vious day is to be purged from the chamber. A small amount ofwater shall be maintained at the bottom of the chamber for humidity. The chamber shall be maintained atroom temperature during the test period.9.4 Moist carbon dioxide (CO2)-sulfur dioxide (SO2) air mixture9.4.1 The test sample shall be su
32、pported in a closed chamber having openings for gas inlet and outlet.A water jacket and a thermostatically controlled heater shall be provided to maintain a temperature of 351C (95 3F).9.4.2 Sulfur dioxide (SO2) and carbon dioxide (CO2) shall be supplied to the test chamber fromcommercial cylinders
33、containing these gases under pressure. An amount of sulfur dioxide equivalent to 1percent of the volume of the test chamber, and an equal volume of carbon dioxide shall be introduced intothe chamber each working day; but prior to the introduction of the gases each day, the gas remaining fromthe prev
34、ious day is to be purged from the chamber. A small amount of water shall be maintained at thebottom of the chamber for humidity.10 Ultraviolet Light and Water Exposure Test10.1 Polymeric materials and rubber compounds used in the tamper resistant features of a hydrant thatis subject to direct exposu
35、re to outdoor environments shall be subjected to the exposure 10.2 10.4, andshall comply with the Normal Operation Test.10.2 Five samples shall be subjected to ultraviolet light and water spray for 720 hours as described in10.3 and 10.4.10.3 The apparatus used is to provide ultraviolet light from tw
36、o enclosed electric arcs formed betweenvertical carbon electrodes 1/2 inch (12.7 mm) in diameter, located at the center of a revolving verticalmetal cylinder, that is 31 inches (787 mm) in diameter and 17-3/4 inches (451 mm) high. The currentthrough the arcs is to be approximately 15 to 17 amperes A
37、C and the potential across the arcs is to beapproximately 120 to 145 volts. The arcs shall be enclosed by clear globes of No. 9200-PX Pyrex glass.10.4 The samples are to be mounted vertically on the inside of the cylinder, facing the arcs, and thecylinder is to be rotated around the arcs at one revo
38、lution per minute. A system of nozzles is to beprovided so that each sample is sprayed in turn with water as the cylinder revolves. During each20-minute operating cycle, each sample shall be exposed only to light from the arcs for 17 minutes andto both water spray and light for 3 minutes. The temper
39、ature within the cylinder while the apparatus is inoperation shall be 63 5C (145 9F).MAY 5, 2017 UL 246B 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL10.5 As an alternate to the test in sections 10.2-10.4, the test samples are to be expose
40、d for 1000 hoursto light and water in accordance with 10.6.10.6 Specimens are to be exposed to ultraviolet light and waterspray by using a Xenon-arc lamp inaccordance with the Standard Practice for Exposing Nonmetallic Materials in Accelerated Test DevicesThat Use Laboratory Light Sources, ASTM G151
41、, and the Standard Practice for Operating Xenon ArcLight Apparatus for Exposure of Nonmetallic Materials, ASTM G155. The spectral power distribution of thexenon lamp shall conform to the requirement in Table 1 in ASTM G155 for a xenon lamp with daylightfilters. A programmed cycle of 120 minutes cons
42、isting of a 102-minute light exposure and an 18-minuteexposure to water spray with light shall be used. The apparatus shall operate with a spectral irradiance of0.35 W/m2nm at 340 nm and a black-panel temperature of 63 3C (145.4 5.4F).11 Gaskets and Seals used in Tamper Resistant Features11.1 Gasket
43、s and seals used on the tamper resistant features of a hydrant shall comply with therequirements for Elastomeric Parts specified in the Standard for Hydrants for Fire Protection Service, UL246.12 Dust Test12.1 A hydrant shall comply with the Normal Operation Test after the tamper resistant features
44、areexposed to dust as described in 12.2.12.2 To determine compliance with the requirement in 12.1, a sample in its intended mounting positionshall be placed in an airtight chamber having an internal volume of at least 3 cubic feet (0.085 m3).Approximately at 2 ounces (0.06 kg) of cement dust, mainta
45、ined at 20 50 percent relative humidity andcapable of passing through a 200 mesh screen, is to be circulated for 1 hour by means of compressed airor a blower so as to completely envelop the sample in the chamber. The airflow shall be maintained at anair velocity of approximately 50 feet per minute (
46、0.25 m/s).12.3 Following the exposure to dust, the tamper resistant features shall be removed from the chamberand mounted in its intended position, and subjected to the Normal Operation Test, clause 7.13 Humidity Test13.1 A hydrant shall comply with the Normal Operation Test after the security featu
47、re is exposed for 24hours to air having a relative humidity of 85 5 percent and a temperature of 30 2C (86 3F).MAY 5, 2017UL 246B8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL14 Endurance Test14.1 A hydrant shall comply with the Normal Oper
48、ation Test after the tamper resistant features are cycledas specified in 14.2 and 14.3.14.2 The tamper resistant features of a hydrant are to be operated as intended by completely removingthe feature from the hydrant and re-installing it to the locked position for 1000 cycles.14.3 The tamper resista
49、nt features of a hydrant shall be cycled at a rate not exceeding 4 cycles perminute.15 External Icing Test15.1 A hydrant shall comply with the Normal Operation Test after the hydrant, complete with the tamperresistant features, without functional damage to the hydrant or the tamper resistant features after beingexposed to the conditions in 15.2 except that the delay in operation or removal of the caps shall notexceed 60s.15.2 The hydrant shall be mounted in a test chamber capable of being conditioned at minus 7C (20F).The hydrant shall be positi
