1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMay 6, 20161UL 299COutline of Investigation for Fire Extinguishing Dry Chemical for SpecialApplicationsIssue Number: 3May 6, 2016Summary of TopicsThis third issue of the Outline of Investigation
2、for Fire Extinguishing DryChemical For Special Applications, UL 299C, includes labelingrequirements and editorial revisions.ULs Outlines of Investigation are copyrighted by UL. Neither a printed norelectronic copy of an Outline of Investigation should be altered in any way. All ofULs Outlines of Inv
3、estigation and all copyrights, ownerships, and rights regardingthose Outlines of Investigation shall remain the sole and exclusive property of UL.COPYRIGHT 2016 UL LLCUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMAY 6, 2016UL 299C2No Text o
4、n This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .42 Components 43 Units of Measurement .44 Undated References 55 Glossary .5CONSTRUCTION6 General 5PERFORMANCE7 General 58 Elevated Temperature Test 69 Hygr
5、oscopicity Test .610 Packed Chamber Test 611 Application Density Test 7MARKING12 General .713 Identification of Contents 8INSTRUCTIONS14 Installation and Design Instructions 8Annex AMAY 6, 2016 UL 299C 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION
6、 FROM ULINTRODUCTION1 Scope1.1 These requirements cover evaluation of dry chemical for physical properties and for fire fightingcapabilities intended for Class B hazards for application in extinguishers and extinguishing systems thatare outside the scope of current installation standards due to spec
7、ial hazard characteristics.1.2 The dry chemical covered by this outline is intended to be applied to extinguish special hazard firesthat are outside the scope of current installation standards. The dry chemical may be distributed throughfixed piping and nozzles, portable fire extinguishers, or other
8、 methods suitable to the Authority HavingJurisdiction. The mass of the dry chemical applied over the area to be protected is to be determined andpublished.2 Components2.1 Except as indicated in 2.2, a component of a product covered by this outline shall comply with therequirements for that component
9、.2.2 A component need not comply with a specific requirement that:a) Involves a feature or characteristic not needed in the application of the component in theproduct covered by this outline, orb) Is superseded by a requirement in this outline.2.3 A component shall be used in accordance with its rec
10、ognized rating established for the intendedconditions of use.2.4 Specific components are recognized as being incomplete in construction features or restricted inperformance capabilities. Such components are intended for use only under limited conditions, such ascertain temperatures not exceeding spe
11、cified limits, and shall be used only under those specific conditionsfor which they have been recognized.3 Units of Measurement3.1 When a value for measurement is followed by a value in other units in parentheses, the second valuemay be only approximate.MAY 6, 2016UL 299C4UL COPYRIGHTED MATERIAL NOT
12、 AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL4 Undated References4.1 Any undated reference to a code or standard appearing in the requirements of this outline shall beinterpreted as referring to the latest edition of that code or standard.5 Glossary5.1 For the purpos
13、es of these requirements, the following definitions shall apply.5.2 DESICCATOR A suitable airtight vessel used to dry samples.5.3 FRIABLE Dry Chemical that has agglomerated (formed lumps, hardened or caked) due to packingor moisture that is able to have the agglomerated broken into particles or the
14、unagglomerated state aftertesting.5.4 STRATIFIED Dry chemical that has formed layers of specific particle size(s).5.5 TUBULAR THIEF A multi-chambered tube with a pointed end used to obtain a representativesample dry chemical from a large quantity.CONSTRUCTION6 General6.1 The hand-portable extinguish
15、er used in the Application Density Test, Section 11, and PackedChamber Test, Section 10, shall consist of a cartridge-operated extinguisher.PERFORMANCE7 General7.1 Representative samples of dry chemical extinguishing agent are to be subjected to the testsdescribed in these requirements.7.2 When subj
16、ected to the tests specified in 7.3 and 7.4, the dry chemical shall be free flowing at alltemperatures in the range from the minimum storage and use temperature to 66C (140F), except thatshould there be any tendency to lump, harden, or cake, such portions shall be friable when dropped froma height o
17、f 100 5 mm (4 in) onto a smooth, hard surface.7.3 Prior to the tests, all dry chemical samples are to be conditioned in a desiccator containing sufficientanhydrous calcium chloride to cover the bottom of the desiccator, for 48 hours at room temperature.7.4 The samples required are to be taken from a
18、 container of dry chemical of approximately 23 kg (50 lb)size that has been rolled or tumbled vigorously through at least 20 revolutions in each of two differentdirections. The individual samples are to be taken using a tubular “thief” intended to prevent the caking ofa stratified sample.MAY 6, 2016
19、 UL 299C 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL8 Elevated Temperature Test8.1 The apparatus to be used in checking for caking in the elevated temperature test at 60C (140F) isto consist of seamless tinned steel cups approximately 75
20、 mm (3 in) in diameter and 50 mm (2 in) deep0.24 L (8 oz) capacity with closely fitting flanged covers, and a thermostatically controlled oven.8.2 A 100 25 g sample of the dry chemical is to be placed in the cup, completely filling the cup, and thenfitted with its cover. The sample is to be placed i
21、n an oven maintained at 60C (140F). After a minimumof 168 h (1 week), the sample is to be removed from the oven, allowed to cool for a minimum of 72 h (3days), and then examined for evidence of caking. Any lumps present are to be dropped from a height of100 mm (4 in) onto a smooth, hard surface to d
22、etermine whether they are friable.9 Hygroscopicity Test9.1 The apparatus for conducting the hygroscopicity test is to consist of 250 mL beakers, 65 mm watchglasses, a humidity jar, a desiccator jar, and an analytical balance.9.2 Hygroscopicity tests are to be conducted on a 100 g sample in a nominal
23、 250 mL beaker. The sampleis to be placed in a humidity jar with a domed top maintained at a temperature of 21 3C (70 5F) andat approximately 80 percent relative humidity for a minimum period of 48 hours (2 days). This relativehumidity can be obtained by maintaining a saturated solution of ammonium
24、chloride by adding and mixinguntil it contains an excess of undissolved crystals, at the bottom of the jar.9.3 After 2 days at 80 percent relative humidity, the 100 g sample is to be placed in a desiccator jarcontaining anhydrous calcium chloride for a minimum of 48 hours (2 days) and then returned
25、to thehumidity jar. This alternating cycle is to be continued for a minimum of 504 hours (three weeks), afterwhich observations are to be made for formation of lumps, hardening or caking of the dry chemical. Anylumps, cakes or hardened sample found after the cycling are to be dropped from a height o
26、f 100 5mm(4 in) onto a smooth, hard surface to determine whether they are friable.10 Packed Chamber Test10.1 The sample hand-portable extinguisher used in the Application Density Test, Section 11, shalldischarge at least 80 percent (by mass) of the total dry-chemical charge after it has been overcha
27、rged andconditioned at 49C (120F) for a minimum of 16 hours. The pressure developed in a cartridge-operatedextinguisher shall not exceed the factory test pressure.10.2 The extinguisher is to be completely filled with dry chemical without jarring and placed in an impactmachine designed to permit free
28、 fall of the extinguisher. The sample is to be dropped four times from aheight of 25 +5/-0 mm (1 +0.2/-0 in) on the extinguisher bottom or a bottom edge to facilitate packing ofthe chemical. Dry chemical is then to be added, without jarring, until the cylinder is again filled. Theextinguisher is to
29、be again placed in the impact machine and dropped three times from a height of 25+5/-0 mm (1 +0.2/-0 in). The extinguisher is to be removed from the machine and once again completelyfilled with dry chemical as in the previous step. Fifteen minutes are to elapse between each fillingoperation. The ext
30、inguisher is to be weighed, pressurized to the maximum expellant gas pressure, or fittedwith a cartridge if cartridge-operated, and conditioned at 49 3C (120 5F) for a minimum of 16 hours.Following the conditioning period, the extinguisher is to be operated. The maximum pressure and weightare to be
31、recorded before and after discharge. The amount of dry chemical discharged is to be calculated.MAY 6, 2016UL 299C6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL11 Application Density Test11.1 This test shall be conducted on a standardized re
32、presentative dry chemical extinguisher that is listedto ANSI/UL 299.11.2 The representative dry chemical extinguisher shall be filled with the test extinguishing agent andpressurized as specified in the operation and maintenance information provided with the extinguisher andconditioned to 21 5C (70
33、10F) and weighed.11.3 The extinguisher shall then be subjected to the Class 20-B fire as specified in the Standard forRating and Fire Testing of Fire Extinguishers, ANSI/UL 711 except that the extinguisher discharge isterminated at the moment that the fire is extinguished. For dry chemical to become
34、 eligible for Certificationtwo consecutive test fires shall be extinguished.11.4 The representative extinguisher shall be permitted to be modified to produce the desired dischargerate of flow and resultant application density, but the discharge time shall not be less than eight seconds.11.5 The disc
35、harged extinguisher shall then be weighed, the quantity discharged determined and theapplication density in kilograms per square meter or pounds per square foot shall be calculated based onthe quantity discharged during extinguishment of the fire and the area of the fuel in the test pan.11.6 The tes
36、t shall be repeated at least once and the average application density in pounds per squarefoot shall be calculated. The application density for any test used to calculate the density shall not havea difference exceeding 10 percent. This average value shall be stated in the Installation and DesignIns
37、tructions, Section 14.MARKING12 General12.1 Dry chemical containers shall be marked with the following:a) Name or identifying symbol of the manufacturer or private labeler.b) Distinctive model number, catalog designation, or the equivalent.c) The year of manufacture, or the last two digits of the ca
38、lendar year. Dry chemicalmanufactured in the last 3 months of a calendar year are permitted to be marked with thefollowing year as the date of manufacture, and dry chemical manufactured in the first 3 monthsof a calendar year are permitted to be marked with the previous year as the date ofmanufactur
39、e.12.2 If a manufacturer produces dry chemical at more than one factory, each location shall have adistinctive marking to identify it as the product of a particular factory.MAY 6, 2016 UL 299C 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL1
40、3 Identification of Contents13.1 In addition to the marking in 12.1, dry chemical containers shall have attached to it in the form of alabel, tag, stencil or similar manner the following information concerning its contents:a) Contents product name as it appears on the manufacturers Safety Data Sheet
41、 (SDS).b) A listing of the contents identified in accordance with the applicable regulations, as stated,governing the classification and labeling of chemicals.c) Information as to what is hazardous about the agent in accordance with the SDS.d) The content manufacturers name, mailing address and phon
42、e number as shown on theSDS.INSTRUCTIONS14 Installation and Design Instructions14.1 Installation and design instructions shall be provided with each shipment of dry chemical shallinclude at least the average application density information in kilograms per square meter or pounds persquare foot used
43、to extinguish a control fire.MAY 6, 2016UL 299C8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULAnnex AThe following tests are conducted on the dry chemical for Identification and Follow-Up purposes:1. PHYSICAL ANALYSIS TESTSEach sample of dry
44、 chemical shall be subjected to the Sieve, Apparent Density Test and WaterRepellency Tests.Sieve Test The apparatus for conducting this test is to be a Cenco-Meinzer, Cat. No. 18480 sieveshaker or equivalent, with standard 140-, 200-, and 270-mesh sieves, cover, bottom pan, and an analyticalbalance.
45、 The sieves shall be made of brass wire and are to be unsupported.The standard sieves are to be placed on the shaker, 100 2.0 g of the dry chemical shall be poured intothe coarsest (top) screen, and the machine is to be operated for not less than 15 min, then for one or more10 min period. The weight
46、 of sample retained on each sieve and on the bottom pan is to be determinedafter each operating period. The 10 min operating periods are to be continued until constant weight untilless than 3 g change in weight in any single portion during a 10 min operation period) is observed. Theweight of samples
47、 retained on each sieve and the bottom pan shall be recorded.Apparent Density Test The apparatus for conducting this test shall be 250 ml stoppered graduatedcylinder, a large stem powder funnel, analytical balance and stopwatch.An approximately 100 g sample of the dry chemical is poured into the gra
48、duated cylinder through thefunnel. Stopper the cylinder. Hold the stopper so it will not fall out and completely invert the cylinder sothat the powder falls to the stoppered end. Return the cylinder to the upright position. Repeat the inversionand return to the upright position a total of ten times
49、in 30 s. Set the cylinder gently on a flat surface andallow the material to settle.Start timing when the cylinder is set upright. After 1 min record the level of the test sample in the cylinder.Apparent density is calculated as follows:Density = (100 x sample weight) / value recordedWater Repellency Test The apparatus for conducting this test shall be 250 ml breakers, desiccator jarand analytical balance.Weighed portions (approximately 50 g of the dry chemical in tared 250 ml beakers) are to be covered with50 ml of distilled water at a tem
