1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULJanuary 25, 20111SUBJECT 327OUTLINE OF INVESTIGATIONFORTURBINE TYPE FLOW METERS FOR FIRE PROTECTION SYSTEMSIssue Number 5January 25, 2011Summary of TopicsThis is the Fifth Issue of the Outline of
2、 Investigation for Turbine TypeFlow Meters for Fire Protection Systems, Subject 327, including revisionsto the Outline title, the Scope, and the Construction and Performancerequirements; and the addition of the Glossary and the requirements forInstructions.This issue becomes effective January 25, 20
3、11, except for the CalibrationTest, Section 17, which becomes effective January 25, 2013. See theCalibration Test, Section 14 of the Fourth Issue for the currentrequirements until the effective date is met.COPYRIGHT 2011 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHE
4、R REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULJANUARY 25, 2011SUBJECT 3272No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .42 Components 43 Glossary .54 Units of Measurement .65 Undated
5、 References 6CONSTRUCTION6 General 67 Sizes 68 Rated Pressure .69 Nonmetallic Materials 610 Type I and Type II Meter Assemblies .711 Strainers 7PERFORMANCE12 General .713 Nonmetallic Materials Test 713.1 Plastic or other nonmetallic parts (excluding rubber and synthetic elastomers) 713.2 Elastomeric
6、 parts (excluding gaskets) 814 Leakage Test 915 Hydrostatic Test .916 Hydraulic Friction Loss Test .917 Calibration Test .1018 Endurance Test 10MANUFACTURING AND PRODUCTION TESTS19 General 11MARKING20 General 11INSTRUCTIONS21 General 12JANUARY 25, 2011 SUBJECT 327 3UL COPYRIGHTED MATERIAL NOT AUTHOR
7、IZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTIONSee Section 14 of the Fourth Issue for the current requirements for the Calibration Test, Section 17 of thisIssue, until the effective date is met.1 Scope1.1 These requirements cover the construction and performance o
8、f turbine type water flowmeters for fireprotection service of Type I, Type II or Type III construction.1.2 The following items are outside the scope of these requirements:a) Materials and construction of the register;b) Evaluation of the by-pass components, including the by-pass meter if provided, e
9、xcept forbody leakage and strength of body;c) Potability and;d) Stationary static gaskets, such as cover gaskets and ring gaskets used between flanges.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.2.2
10、 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; orb) Is superseded by a requirement in this Outline.2.3 A component shall be used in accordance with
11、 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 limited conditions, such as certain temperatures notexceeding specified limits, and shal
12、l be used only under those specific conditions.JANUARY 25, 2011SUBJECT 3274UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL3 Glossary3.1 For the purpose of these requirements, the following definitions apply.3.2 NPS (NOMINAL PIPE SIZE) A dimen
13、sionless designator for pipe sizes defined in standards,including the Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded andSeamless, ASTM A53/A53M, the Standard Specification for Electric-Resistance-Welded Steel Pipe,ASTM A135/A135M, and the Standard Specification for
14、 Black and Hot-Dipped Zinc-Coated (Galvanized)Welded and Seamless Steel Pipe for Fire Protection Use, ASTM A795/A795M, used to replace termssuch as “Nominal Diameter” and “Nominal Size”.3.3 TYPE I METER A proportional meter assembly with a by-pass line consisting of:a) A detector type valve that rem
15、ains closed under low water flow conditions and diverts thelow flow through;b) A bypass meter;c) A main body with an unobstructed waterway with the same internal diameter of the pipe; andd) A turbine type meter located in the main body that passes and meters a portion of the totalvolume of water thr
16、ough the main body.3.4 TYPE II METER A meter assembly with a by-pass line consisting of:a) A detector type valve that remains closed under low water flow conditions and diverts thelow flow through;b) A bypass meter;c) A Strainer; andd) A main line turbine meter located in the main body that allows h
17、igh rates of water flow topass through the main body.3.5 TYPE III METER A meter assembly consisting of:a) A Strainer and;b) A main line turbine meter located in the main body through which the entire water volumeflows.JANUARY 25, 2011 SUBJECT 327 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER R
18、EPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL4 Units of Measurement4.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory orapproximate information.5 Undated References5.1 Any undated reference to code or standard appearing in the requirements of thi
19、s outline shall beinterpreted as referring to the latest edition of that code or standard.CONSTRUCTION6 General6.1 The meter is to be designed and constructed to comply with the applicable portions of the AmericanWater Works Association (AWWA) Standard for Cold-Water Meters Fire Service Type, AWWA C
20、703,including body materials and by-pass meters.7 Sizes7.1 A meter shall be constructed for use with standard pipe of size (NPS), 3 NPS or larger.7.2 Meter sizes refer to the nominal diameter of the waterway through the inlet and outlet connectionsand to the pipe size for which the connections are i
21、ntended.8 Rated Pressure8.1 A meter shall be constructed for a minimum rated pressure of 175 psig.9 Nonmetallic Materials9.1 A plastic or other nonmetallic part, other than rubber parts such as seals and O rings, is to bejudged on the basis of:a) Mechanical strength;b) Water absorption;c) Resistance
22、 to deterioration due to aging; andd) Volumetric and dimensional changes. See 13.1.1.1 13.1.2.2.9.2 A rubber part or synthetic elastomer of such type used in a meter assembly is to be judged on thebasis of tensile strength, elongation, and resistance to aging. See 13.2.1.JANUARY 25, 2011SUBJECT 3276
23、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL10 Type I and Type II Meter Assemblies10.1 Type I and Type II meters shall be constructed such that the detector portion of the meter consistsof a detector check valve complying with the Standard
24、 for Check Valves for Fire-Protection Service, UL312.10.2 Type I and Type II meters with integral detector check valves shall comply with the applicablerequirements of the Standard for Check Valves for Fire-Protection Service, UL 312.11 Strainers11.1 For meters that require strainers, strainers shal
25、l comply with the Outline of Investigation for PipelineStrainers, Subject 321.11.2 Meters with integral strainers shall be permitted if the strainer portion of the device complies with theapplicable requirements of the Outline of Investigation for Pipeline Strainers, Subject 321.PERFORMANCE12 Genera
26、l12.1 Representative samples of meters are to be subjected to the tests described in these requirements.Test bars of metal used in castings and additional samples of parts constructed of nonmetallic material,such as rubber seals, are required for physical and chemical tests.13 Nonmetallic Materials
27、Test13.1 Plastic or other nonmetallic parts (excluding rubber and synthetic elastomers)13.1.1 Air oven aging13.1.1.1 After air-oven aging for 90 days at 100 1C (212 2F), there shall be no warping, creeping,cracking, or other evidence of deterioration of a plastic (or other like material) component w
28、hich mayimpair the intended operation of the meter and the Izod impact strength shall not be reduced by more than30 percent. Additionally, a meter with aged plastic (or other like material) components shall comply withthe requirements in the Calibration Test, Section 17.13.1.1.2 The Izod impact stre
29、ngth tests are to be conducted in the as received and aged conditions inaccordance with Standard Test Methods for Determining the Izod Pendulum Impact Resistance ofPlastics, ASTM D256.13.1.1.3 If a material cannot withstand the temperature specified in 13.1.1.1 without excessive softening,distortion
30、, or deterioration, an air-oven aging test at a lower temperature for a longer period of time maybe applied. The duration of exposure is to be calculated from the following equation:D = (92,000)e-0.0693tin which:D is the test duration in days, andJANUARY 25, 2011 SUBJECT 327 7UL COPYRIGHTED MATERIAL
31、 NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULt is the test temperature in degrees C.13.1.1.4 A complete meter assembly including plastic (or other like) parts, and sample plastic (or otherlike) components to be aged, are to be supported in a full draft, circulati
32、ng air oven that has beenpreheated at full draft to 100 1C (212 2F). Rubber seats or O rings may be included or excluded atthe manufacturers option. Samples are to be supported so that they do not touch one another or the sidesof the oven. The samples are to be aged for 90 days, at full draft, and t
33、hen allowed to cool in air at 232C (73 4F) for at least 4 hours before any test or dimensional check is conducted. Prior to any tests,rubber parts complying with the requirements in 13.2.1 and 13.2.2 are to be installed in the meter, if theyare not included in the aging test. As used in this test, t
34、he term full draft refers to the air flow over thesamples in the oven with air inlet and outlet full open. The oven used for accelerated aging is to be TypeIIA as specified in the Standard Specification for Gravity-Convection and Forced-Ventilation Ovens, ASTME145.13.1.2 Water aging13.1.2.1 After im
35、mersion in tap water at 87 2C (188 4F) for 90 days, there shall be no warping,creeping, cracking, or other signs of deterioration of a plastic (or other like) component which may impairthe intended operation of the meter and the izod impact strength shall not be reduced by more than 30percent. Addit
36、ionally, a meter with aged components shall comply with the requirements in the CalibrationTest, Section 17.13.1.2.2 If a material cannot withstand the temperature specified in 13.1.2.1 without excessive softening,distortion, or deterioration, a water aging test at a lower temperature for a longer p
37、eriod of time may beapplied. The duration of exposure is to be calculated from the following formula:D = (37,000)e-0.0693tin which:D is the exposure duration in days, andt is the test temperature, degrees C.13.2 Elastomeric parts (excluding gaskets)13.2.1 An elastomeric part used to provide a seal s
38、hall have the following properties when tested asspecified in the Standard for Gaskets and Seals, UL 157:a) For silicone rubber (having poly-organo-siloxane as its constituent characteristic), aminimum tensile strength of 500 psi (3.4 MPa) and a minimum ultimate elongation of 100percent.b) For natur
39、al rubber and synthetic rubber other than silicone rubber, a minimum tensilestrength of 1500 psi (10.3 MPa) and minimum ultimate elongation of 150 percent; or a minimumtensile strength of 2200 psi (15.2 MPa) and a minimum ultimate elongation of 100 percent.c) Those properties relating to maximum ten
40、sile set, minimum tensile strength and elongationafter oven aging, and hardness after oven aging, all as specified in UL 157. The maximumservice temperature used to determine the oven time and temperature for oven aging isconsidered to be 60C.JANUARY 25, 2011SUBJECT 3278UL COPYRIGHTED MATERIAL NOT A
41、UTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL13.2.2 The Standard for Gaskets and Seals, UL 157, provides for the testing of either finished elastomericparts or sheet or slab material. Sheet or slab material is to be tested when the elastomeric parts areO-rings having d
42、iameters of less then 1 inch (25.4 mm). The material tested is to be the same as that usedin the product, regardless of whether finished elastomeric parts or sheet or slab material is tested.14 Leakage Test14.1 A meter assembly shall withstand, without leakage of all bodies, joints and piping, an in
43、ternalhydrostatic pressure of two times the rated pressure of the meter.14.2 The meter assembly, including by-pass components and by-pass meter if provided, shall besubjected to the internal hydrostatic pressure applied for 1 minute.15 Hydrostatic Test15.1 A meter assembly shall withstand a test pre
44、ssure equal to four times the rated pressure withoutrupture.15.2 The meter assembly used in the Leakage Test shall be subjected to the internal hydrostatic pressureapplied for 5 minutes.16 Hydraulic Friction Loss Test16.1 A meter shall have a friction loss not exceeding the values in Table 16.1 at f
45、low rates specified inTable 16.2.Table 16.1Allowable friction loss for meter constructionMeter construction type Allowable friction loss, psiI7II 13III 10Table 16.2Friction loss test flow rateMeter size, NPS Flow rate, GPM3 3504 6306 14008 240010 and larger Meters 10 NPS and larger shall be tested a
46、t a flow rate thatwill result in a velocity of 16 feet per second based uponthe open area in Schedule 40 pipe of the same nominalsize as the valve.16.2 The sample meter assembly is to be installed in its intended position in a test piping system. Thetest line is to be equipped with a calibrated flow
47、 meter or equivalent means by which selected rates of flowcan be established. A differential pressure measuring device is to be connected to piezometer fittingslocated upstream and downstream from the test meter by means of which the loss-of-head between theJANUARY 25, 2011 SUBJECT 327 9UL COPYRIGHT
48、ED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULtwo piezometer fittings is to be measured. Selected flow rates are to be established and the loss-of-headover the meter plus that over the piping between piezometers for each rate of flow is to be calculated
49、 fromthe pressure measuring device reading.16.3 The sample meter then is to be removed from the test piping and the loss-of-head for test pipinglocated between the piezometer fittings is to be determined for the same rates of flow. The loss-of-headfor the meter then is to be determined by subtracting the losses over the piping along from the losses overthe piping and meter.17 Calibration TestSection 17 effective January 25, 201317.1 The error of Type I and Type II flowmeters, when not flowing through the by-pass and Type IIImeters at any flow r
