1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULOCTOBER 25, 20161UL 2987Outline of Investigation for Steel Sprinkler Pipe Corrosion IndicatorsIssue Number: 1October 25, 2016Summary of TopicsThis First issue of the Outline of Investigation for
2、Steel Sprinkler PipeCorrosion Indicators, UL 2987, is being issued to address corrosionindicator devices intended to be installed within a sprinkler system havingsteel piping to provide a means to determine when substantial internalcorrosion is occurring within the system.ULs Outlines of Investigati
3、on are copyrighted by UL LLC. Neither a printed norelectronic copy of an Outline of Investigation should be altered in any way. All ofULs Outlines of Investigation and all copyrights, ownerships, and rights regardingthose Outlines of Investigation shall remain the sole and exclusive property of ULLL
4、C.COPYRIGHT 2016 UL LLCUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULOCTOBER 25, 2016UL 29872No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 S
5、cope .42 Components 43 Units of Measurement .54 Undated References 5CONSTRUCTION5 General 5PERFORMANCE6 General 67 Leakage Test 68 Strength of Body Test .6MARKINGS9 General 7INSTALLATION AND MAINTENANCE INSTRUCTIONS10 General .7OCTOBER 25, 2016 UL 2987 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FUR
6、THER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements cover corrosion indicating devices intended to be installed within a wet or drypipe sprinkler system having steel piping to provide for a means to determine when substantial internalcorrosion is occu
7、rring within the system. This equipment is intended for installation in accordance with themanufacturers installation instructions and the applicable requirements of the following standards:a) Standard for the Installation of Sprinkler Systems, ANSI/NFPA 13.b) Standard for the Installation of Sprink
8、ler Systems in Low-Rise Residential Occupancies,ANSI/NFPA 13R.c) Standard for the Installation of Sprinkler Systems in One- and Two-Family Dwellings andManufactured Homes, ANSI/NFPA 13D.d) National Electrical Code, ANSI/NFPA 70.2 Components2.1 Except as indicated in 2.2, a component of a product cov
9、ered by this Outline shall comply with therequirements 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, orb) Is superseded by a
10、 requirement in this Outline.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 limited con
11、ditions, such as temperatures not exceedingspecified limits, and shall be used only under those specific conditions.OCTOBER 25, 2016UL 29874UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL3 Units of Measurement3.1 Values stated without parenth
12、eses 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 requirements of this Outline shall beinterpreted as referring to the latest edition of that code or standard.CONSTRUCTION5 Ge
13、neral5.1 A corrosion indicator shall be constructed for a minimum rated pressure of 175 psig (1.2 MPa).5.2 Steel piping used for the body of a corrosion indicating device shall conform to Schedule 10 or 40steel pipe made in accordance with Standard Specification for Black and Hot-Dipped Zinc-Coated(
14、Galvanized) Welded and Seamless Steel Pipe for Fire Protection Use, ASTM A795, or StandardSpecification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless, ASTM A53 orStandard Specification for Electric-Resistance-Welded Steel Pipe, ASTM A 135/A 135M.5.3 When a corrosion indicat
15、or uses a thin wall section of steel piping described in 5.1 to provide a meansof indicating substantial internal corrosion, the thin wall section shall comply with the following:a) A nominal thickness not greater than 30 percent of the nominal wall thickness of thesprinkler piping for which the ind
16、icator is intended to be used.b) A nominal thickness that will result in a hoop stress applied to the thinned section that is notmore than 50 percent of the minimum yield strength of the material.c) A thickness tolerance of not greater than 0.005 inch.5.4 Pressure switches shall comply with the appl
17、icable construction requirements in the Standard forAlarm Accessories for Automatic Water-Supply Control Valves for Fire Protection Service, UL 753.5.5 Accessory equipment shall comply with the construction requirements applicable to the device and itsintended use.5.6 Threaded end connections shall
18、comply with National Pipe Threads (NPT) conforming to theStandard for Pipe Threads, General Purpose (Inch), ANSI/ASME B1.20.1 or Standard for Dryseal PipeThreads (Inch), ANSI B1.20.3.5.7 Grooved end connections shall comply with the Standard for Grooved and Shouldered Joints,ANSI/AWWA C600.OCTOBER 2
19、5, 2016 UL 2987 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL5.8 Flanged end connections shall comply with the Standard for Pipe Flanges and Flanged Fittings: NPS1/2 through 24, ANSI/ASME B16.5.PERFORMANCE6 General6.1 Pressure switches sha
20、ll comply with the applicable performance requirements in the Standard forAlarm Accessories for Automatic Water-Supply Control Valves for Fire Protection Service, UL 753.6.2 Accessory equipment shall comply with the performance requirements applicable to the device andits intended use.7 Leakage Test
21、7.1 A corrosion indicator shall be capable of withstanding without leakage through the body or at jointsan internal hydrostatic pressure of two times the rated working pressure, applied for a period of 1 minute.7.2 During this test, a thin wall section of pipe used as an indicator is to be perforate
22、d so as to apply thetest pressure the entire body of the device.7.3 A representative sample(s) of the corrosion indicator is be filled with water and vented of air. Thepressure is to be gradually increased at a rate not exceeding 300 psig (2.07 MPa) per minute until therequired test pressure is achi
23、eved and held for 1 minute. Visual observations are to be made for leakagethrough the body.8 Strength of Body Test8.1 A corrosion indicator shall withstand without rupture a hydrostatic pressure of four times the ratedworking pressure applied for a period of 5 minutes.8.2 During this test, a thin wa
24、ll section of pipe used as an indicator is to be perforated so as to apply thetest pressure the entire body of the device.8.3 A representative sample(s) of the corrosion indicator is to be filled with water and vented of air. Thepressure is to be gradually increased at a rate not exceeding 300 psig
25、(2.07 MPa) per minute until therequired test pressure is achieved and held for 5 minutes.OCTOBER 25, 2016UL 29876UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMARKINGS9 General9.1 Each corrosion indicator shall be legibly and permanently mar
26、ked with the following:a) The manufacturers or private labelers name or identifying symbol,b) A distinctive product identification designation,c) Pressure rating, andd) Nominal size.9.2 If a corrosion indicator is manufactured at more than one factory, each unit shall have a distinctivepermanent mar
27、king to identify it as the product of a particular factory.INSTALLATION AND MAINTENANCE INSTRUCTIONS10 General10.1 Steel sprinkler pipe corrosion indicators shall be provided with installation and maintenanceinstructions that include at least the following items:a) Detailed instructions for properly
28、 installing and maintaining the equipment.b) Reference to the need for periodic or continuous monitoring of the corrosion indicator todetermine its functional status.c) Operating temperature ranged) The set pressure of the pressure switch when used.e) Type of steel pipe for which the corrosion indic
29、ator is intended to be used.f) Maximum system working pressure associated with the use of the corrosion indicatorg) Reference to installation and use in accordance with the Standard for the Installation ofSprinkler Systems, NFPA 13; and inspection, testing and maintenance in accordance with theStandard for the Inspection, Testing and Maintenance of Water-Based Fire Protection Systems,ANSI/NFPA 25.OCTOBER 25, 2016 UL 2987 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULOCTOBER 25, 2016UL 29878No Text on This Page
