1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMay 13, 20111SUBJECT 327BOUTLINE OF INVESTIGATIONFORULTRASONIC AND MAGNETIC TYPE WATER FLOW METERSIssue Number 3May 13, 2011Summary of TopicsThis is the third issue of the Outline of Investigatio
2、n for Ultrasonic andMagnetic Type Water Flow Meters, Subject 327B, including revisions toSection 15.This issue becomes effective May 13, 2011, except for the Installation andDesign Instructions, Section 23, which becomes effective March 25, 2012.See the First Issue for the current requirements for t
3、he Installation andDesign Instructions, Section 23 until the effective date is met.COPYRIGHT 2011 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMAY 13, 2011SUBJECT 327B2No Text on This PageUL COPYRIGHTED MATERIA
4、L NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .52 Components 53 Units of Measurement .64 Undated References 65 Glossary .6CONSTRUCTION6 General 67 Sizes 78 Rated Pressure .79 Materials .79.1 Nonmetallic materials exposed to water .79.2
5、 Metallic materials (Body) 89.3 Coatings for ferrous bodies 810 Strainers 8PERFORMANCE11 General .812 Nonmetallic Materials Test 912.1 Plastic or other nonmetallic parts (excluding rubber and synthetic elastomers) 912.2 Elastomeric parts (except gaskets) .1213 Leakage Test 1214 Hydrostatic Test 1215
6、 Hydraulic Friction Loss Test 1216 Calibration Test .1317 Endurance Test 1318 Tests on Organic Coating Materials .1418.1 General .1418.2 Air oven exposure 1418.3 Water immersion .1518.4 Sodium chloride immersion 1518.5 Potassium biphthalate immersion .1518.6 Sodium carbonate immersion 1618.7 Impact
7、test 1619 10-Day Moist Ammonia Stress Cracking Test 1620 Electronic Assemblies .1720.1 General .1720.2 Tests .17MANUFACTURING AND PRODUCTION TESTS21 General 18MARKING22 General 18MAY 13, 2011 SUBJECT 327B 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISS
8、ION FROM ULINSTRUCTIONS23 Installation and Design Instructions .19MAY 13, 2011SUBJECT 327B4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTIONSee the First Issue for the current requirements for the Installation and Design Instruction
9、s, Section 23,until the effective date is met.1 Scope1.1 These requirements cover the construction and performance of inferential ultrasonic and magnetictype water flowmeters intended for use in dry, indoor atmospheres, and for cold water supplies to waterbased fire suppression systems in a complete
10、ly wetted pipe section when:a) Connected to combined domestic plumbing and residential sprinkler fire protection service(multipurpose fire protection system) when installed as specified in the Standard for theInstallation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes,N
11、FPA 13D, orb) Connected directly to a fire suppression system such as the following:1) Standard for Low-, Medium, and High- Expansion Foam, NFPA 11,2) Standard for Installation of Sprinkler Systems in Residential Occupancies up to andIncluding Four Stories in Height, NFPA 13R,3) Standard for Install
12、ation of Sprinkler Systems, NFPA 13,4) Standard for Installation of Standpipe and Hose Systems, NFPA 14,5) Standard for Installation of Water Spray Fixed Systems for Fire Protection, NFPA 15,and6) Standard for Installation of Foam-Water Sprinkler Systems and Foam-Water SpraySystems, NFPA 16.2 Compon
13、ents2.1 Except as indicated in 2.2, a component of a product covered by this Outline of Investigation shallcomply 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 applicatio
14、n of the component in theproduct covered by this Outline of Investigation; orb) Is superseded by a requirement in this Outline of Investigation.2.3 A component shall be used in accordance with its rating established for the intended conditions ofuse.MAY 13, 2011 SUBJECT 327B 5UL COPYRIGHTED MATERIAL
15、 NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL2.4 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 sp
16、ecified 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 Any undated reference to a code or standard appearing in the
17、 requirements of this standard shall beinterpreted as referring to the latest edition of that code or standard.5 Glossary5.1 For the purpose of these requirements, the following definitions apply.5.2 MAGNETIC FLOW METER A water volume measuring device where the flow volume is basedon meaurement of i
18、nduction of magnetic waves through the water medium.5.3 NPS (NOMINAL PIPE SIZE) A dimensionless designator for pipe sizes defined in standardsincluding the Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded andSeamless, ASTM A53/A53M, the Standard Specification for Ele
19、ctric-Resistance-Welded Steel Pipe,ASTM A135/A135M, and the Standard Specification for Black and Hot-Dipped Zinc-Coated (Galvanized)Welded and Seamless Steel Pipe for Fire Protection Use, ASTM A795/A795MASTM used to replaceterms such as “Nominal Diameter” and “Nominal Size”.5.4 ULTRASONIC FLOW METER
20、 A water volume measuring device where the flow volume is basedon acoustic energy pulses through a water medium, using technology and methods such asmeasurement of the difference of the transit time of propagating in and against flow direction ormeasurement of the change in frequency of a sound wave
21、 (Doppler shift).CONSTRUCTION6 General6.1 Meters with moving parts in the waterway or parts that are susceptible to damage from debris in thewaterway, shall be equipped with integral strainers or shall be provided with strainers as part of the meterassembly. Integral strainer assemblies shall comply
22、 with the requirements for Strainers, Section 10 andstrainers equipped as part of the meter assembly shall be certified for Fire Protection Service.6.2 Electronic portions of meter assemblies shall be evaluated for compliance with the applicableconstruction requirements of the Standard for General-P
23、urpose Signaling Devices and Systems, UL 2017.MAY 13, 2011SUBJECT 327B6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL7 Sizes7.1 Meters intended for residential applications shall be constructed for use with standard pipe size (NPS)sizes of 3
24、/4 through 2 NPS.7.2 Meters connected directly to a fire suppression systems and not intended for residential applicationsshall be constructed for use with standard pipe size (NPS) sizes larger than 2 NPS.7.3 Meter sizes refer to the nominal diameter of the waterway through the inlet and outlet conn
25、ectionsand to the pipe size for which the connections are intended.8 Rated Pressure8.1 Meters shall be constructed for a minimum rated pressure of 175 psig (1.2 MPa).8.2 Meters intended for residential application in multipurpose piping systems as specified in theStandard for the Installation of Spr
26、inkler Systems in One- and Two-Family Dwellings and ManufacturedHomes, NFPA 13D shall be permitted to be rated 130 psig (0.89 MPa) or higher.9 Materials9.1 Nonmetallic materials exposed to water9.1.1 A plastic or other nonmetallic part, other than rubber parts such as seals and O rings that isnormal
27、ly exposed to water, is to be judged on the basis of:a) Mechanical strength;b) Water absorption;c) Resistance to deterioration due to aging; andd) Volumetric and dimensional changes. See 12.1.1.1 12.1.2.2.9.1.2 An elastomeric part of such type used as a seal in a meter assembly is to be judged on th
28、e basisof tensile strength, elongation, and resistance to aging. See 12.2.1.MAY 13, 2011 SUBJECT 327B 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL9.2 Metallic materials (Body)9.2.1 Meter bodies fabricated from copper alloys shall contain
29、not more than 15 percent zinc.9.2.2 Meter bodies fabricated from copper alloys containing more than 15 percent zinc shall be permittedif the body material complies with the 10-Day Moist Ammonia Stress Cracking Test, Section 19.9.2.3 Meter bodies fabricated from cast iron shall at least comply with t
30、he requirements of StandardSpecification for Gray Iron Castings, ASTM A48/A48M or Standard Specification for Gray Iron Castingsfor Valves, Flanges, and Pipe Fittings, ASTM A126.9.2.4 Meter bodies fabricated from steel shall at least comply with Standard Specification for Steel, Sheetand Strip, Hot-R
31、olled, Carbon, Structural, High-Strength Low-Alloy and High-Strength Low-Alloy withImproved Formability and Ultra-High Strength, ASTM A1011/A1011M.9.3 Coatings for ferrous bodies9.3.1 Meter bodies fabricated from ferrous materials shall be protected by hot-dip galvanizing inaccordance with Standard
32、Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware, ASTMA153/A153M or protected with organic coatings when evaluated to determine compliance with Section 18.10 Strainers10.1 The surface area of the screen openings shall be not less than a ratio of 4 to 1 of the cross-sectionalarea o
33、f Schedule 40 steel pipe for the nominal meter size.10.2 The material for the screen is to be corrosion resistant such as brass, bronze, stainless steel, orplastic.10.3 Screen size openings shall be not less than 1/8 nor more than 1/4 inch diameter.10.4 Strainers that are capable of being cleaned un
34、der rated working pressure shall be permitted to havea screen having openings not less than 1/16 inch diameter.PERFORMANCE11 General11.1 Representative samples of meters are to be subjected to the tests described in these requirements.Additional representative samples of parts constructed of metalli
35、c, nonmetallic material, such as rubberseals, are required for physical and chemical tests.MAY 13, 2011SUBJECT 327B8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL12 Nonmetallic Materials Test12.1 Plastic or other nonmetallic parts (excluding
36、 rubber and synthetic elastomers)12.1.1 Air oven aging of moving parts exposed to water12.1.1.1 After air-oven aging for 90 days at 100 1C (212 2F):a) There shall be no warping, creeping, cracking, or other evidence of deterioration of a plasticor other like non-metallic component that may impair th
37、e intended operation of the meter.b) The izod impact strength shall not be reduced by more than 30 percent.c) A meter assembled with aged components shall comply with the requirements in theCalibration Test, Section 16.12.1.1.2 The izod impact strength tests are to be conducted in the as received an
38、d aged conditions inaccordance with Standard Test Methods for Determining the Izod Pendulum Impact Resistance ofPlastics, ASTM D256.12.1.1.3 If a material cannot withstand the temperature specified in 12.1.1.1 without excessive softening,distortion, or deterioration, an air-oven aging test at a lowe
39、r temperature for a longer period of time shallbe conducted. If a material can withstand a higher temperature than specified in 12.1.1.1 withoutexcessive softening, distortion, or deterioration, an air-oven aging test at a higher temperature for ashorter period of time shall be permitted. The durati
40、on of exposure is to be calculated from the followingequation:D = (92,000)e-0.0693tin which:D is the test duration in days; andt is the test temperature in degrees C.12.1.1.4 Plastic or other like non-metallic parts, and sample components to be aged, are to be supportedin a full draft, circulating a
41、ir oven that has been preheated to 100 1C (212 2F) or the calculatedtemperature in 12.1.1.3. Samples shall be supported so that they do not touch one another or the sidesof the oven. The samples are to be aged for the required time period, at full draft, and then allowed tocool in air at 23 2C (73 4
42、F) for at least 4 hours before any test or dimensional check is conducted.Prior to any tests, rubber parts complying with the requirements in 12.2.1 and 12.2.2 are to be installedin the meter, if they are not included in the aging test. As used in this test, the term full draft refers tothe air flow
43、 over the samples in the oven with the oven air inlet and outlet full open. The oven used foraccelerated aging is to be Type IIA as specified in the Standard Specification for Gravity-Convection andForced-Ventilation Ovens, ASTM E145.MAY 13, 2011 SUBJECT 327B 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED
44、FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL12.1.2 Water aging of moving parts exposed to water12.1.2.1 After immersion in tap water at 87 2C (188 4F) for 90 days:a) There shall be no warping, creeping, cracking, or other signs of deterioration of a plastic orother like non-met
45、allic component, that may impair the intended operation of the meter.b) The izod impact strength shall not be reduced by more than 30 percent.c) A meter assembled with aged components shall comply with the requirements in CalibrationTest, Section 16.12.1.2.2 If a material cannot withstand the temper
46、ature specified in 12.1.2.1 without excessive softening,distortion, or deterioration, a water aging test at a lower temperature for a longer period of time shall bepermitted. The duration of exposure is to be calculated from the following formula:D = (37,000)e-0.0693tin which:D is the exposure durat
47、ion in days; andt is the test temperature in degrees C.12.1.3 Air oven aging of stationary parts exposed to water12.1.3.1 After air-oven aging for 90 days at 100 1C (212 2F):a) There shall be no warping, creeping, cracking, or other evidence of deterioration of a plasticor other like non-metallic co
48、mponent that may impair the intended operation of the meter.b) A meter assembled with aged components, shall be operated at its maximum continuousflow for a period of 1 hour without malfunction or deterioration as indicated by a change in thehydraulic friction loss value exceeding 1 psi of an as rec
49、eived (unaged) sample at a flowvelocity of 15 ft/s based on Schedule 40 steel pipe for the nominal meter size.12.1.3.2 If a material cannot withstand the temperature specified in 12.1.3.1 without excessive softening,distortion, or deterioration, an air-oven aging test at a lower temperature for a longer period of time shallbe conducted. If a material can withstand higher temperature than specified in 12.1.3.1 without excessivesoftening, distortion, or deterioration, an air-oven aging test at a higher temperature for a shorter periodof time shall
