UL SUBJECT 1254F-2016 Outline of Investigation for Rubber-Gasketed Fittings and Metallic Pipe for Commercial Cooking Equipment Protection Extinguishing System Units (Issue 1).pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMarch 4, 20161UL 1254FOutline of Investigation for Rubber-Gasketed Fittings and Metallic Pipe forCommercial Cooking Equipment Protection Extinguishing System UnitsIssue Number 1March 4, 2016Summa

2、ry of TopicsThis is the first issue of the Outline of Investigation for Rubber-GasketedFittings and Metallic Pipe for Commercial Cooking Equipment ProtectionExtinguishing System Units, UL 1254F.COPYRIGHT 2016 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTI

3、ON ORDISTRIBUTION WITHOUT PERMISSION FROM ULMARCH 4, 2016UL 1254F2No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .42 Components 43 Units of Measurement .54 Undated References 55 Glossary .5CONST

4、RUCTION6 General 67 Fittings 68 Pipe .69 Joints 6PERFORMANCE10 Bending Moment Test .611 Leakage Test 612 Hydrostatic Pressure Test 713 Vibration Test .714 Elastomeric Parts Test .715 10-Day Moist Ammonia Air Stress Cracking Test 716 Flow Distribution Tests .717 Fire Exposure Test .718 500 Cycle Oper

5、ation Test 8MARKING19 General .8INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS20 General .9MARCH 4, 2016 UL 1254F 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements cover rubber-gasketed fittings a

6、nd metallic pipe intended for use as extinguishingagent distribution piping of pre-engineered fire extinguishing system units for protection of commercialcooking equipment. For installation requirements, see the following documents: the Standard for DryChemical Extinguishing Systems, NFPA 17, or the

7、 Standard for Wet Chemical Extinguishing Systems,NFPA 17A and the manufacturers instruction manual.1.2 The fittings are of the configuration type (e.g., tees, elbows, couplings, and transition fittings) withintegral rubber gaskets or seals.1.3 The joints formed with the use of fittings covered by th

8、is Outline of Investigation prevent separationunder pressure.1.4 Pre-engineered fire extinguishing system units, extinguishing agents, or both are required to complyalso with the requirements for construction, performance, and fire testing as applicable to specific types,designs, sizes, and arrangem

9、ents. All such additional requirements which apply are not within the scopeof these requirements; but are contained in UL 1254, (Construction and Performance), and UL 300, (FireTesting).2 Components2.1 Except as indicated in 2.2, a component of a product covered by this Outline of Investigation shal

10、lcomply 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 require

11、ment 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 li

12、mited conditions, such as temperatures not exceedingspecified limits, and shall be used only under those specific conditions.MARCH 4, 2016UL 1254F4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL3 Units of Measurement3.1 Values stated without

13、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 requirements of this Outline ofInvestigation shall be interpreted as referring to the latest edition of that code or s

14、tandard.UL StandardsUL 213Rubber Gasketed Fittings for Fire-Protection ServiceUL 300Fire Testing of Fire Extinguishing Systems for Protection of Commercial Cooking EquipmentUL 852Metallic Sprinkler Pipe for Fire Protection ServiceUL 1254Pre-Engineered Dry Chemical Extinguishing System Units5 Glossar

15、y5.1 For the purpose of these requirements, the following definitions and those contained in the currenteditions of UL 1254 and UL 300 apply:5.2 FITTING, RUBBER-GASKETED CONFIGURATION Devices thata) are used to connect pipe ends,b) use an elastomeric material to seal the joint, andc) are of differen

16、t various types (for example, tees, elbows, couplings, and transition fittings).5.3 JOINT The connection between pipe end and fitting.5.4 PIPE Round tube that is used for the transfer of extinguishing agent from the agent storagecontainer to the nozzle during discharge.MARCH 4, 2016 UL 1254F 5UL COP

17、YRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONSTRUCTION6 General6.1 For the purpose of these requirements, the following construction requirements and those containedin the current edition of UL 1254 apply.7 Fittings7.1 Each fitting shall be me

18、tallic and have strength and corrosion resistance at least equivalent to brass,bronze, or austenitic stainless steel.7.2 Each fitting shall include an integral elastomeric seal.8 Pipe8.1 Pipe shall be metallic and have strength and corrosion resistance at least equivalent to brass, bronze,or austeni

19、tic stainless steel.8.2 Pipe shall be manufactured in accordance with a nationally recognized standard.9 Joints9.1 The pipe-to-fitting joint formed shall prevent rotation and separation under pressure.PERFORMANCE10 Bending Moment Test10.1 The Bending Moment Test specified in UL 213 shall be conducte

20、d on pipe and fitting assemblies ofeach size and type of pipe, fitting, and joint. The applied moment shall be based upon the maximumsupport spacing referenced in the instruction manual. For this test, coupling and tee fittings are consideredrepresentative of other fitting types.11 Leakage Test11.1

21、The Leakage Test specified in UL 213 shall be conducted on pipe and fitting assemblies of each sizeand type of pipe, fitting, and joint referenced in the instruction manual.MARCH 4, 2016UL 1254F6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL

22、12 Hydrostatic Pressure Test12.1 The Hydrostatic Pressure Test specified in UL 1254 shall be conducted on pipe and fittingassemblies of each size and type of pipe, fitting, and joint referenced in the instruction manual.13 Vibration Test13.1 The Vibration Test specified in UL 852 shall be conducted

23、on pipe and fitting assemblies of eachsize and type of pipe, fitting, and joint referenced in the instruction manual. For this test, coupling fittingsare considered representative of other fitting types.14 Elastomeric Parts Test14.1 The Elastomeric Parts Test specified in UL 213 shall be conducted o

24、n each elastomeric sealmaterial. The test temperature and duration shall be based upon the maximum ambient temperature forinstallation of the pipe and fittings referenced in the instruction manual.15 10-Day Moist Ammonia Air Stress Cracking Test15.1 The 10-Day Moist Ammonia Air Stress Cracking Test

25、specified in UL 1254 shall be conducted oneach size and type of fitting referenced in the instruction manual.16 Flow Distribution Tests16.1 The Flow Distribution Tests specified in UL 1254 shall be conducted on each size and type of pipe,fitting, and joint referenced in the instruction manual.17 Fir

26、e Exposure Test17.1 This test shall be conducted on pipe and fitting assemblies representative of each size and type ofpipe, fitting, and joint referenced in the instruction manual. Following fire exposure, the pipe and fittingassemblies shall operate as intended.Exception: Pipe and fittings that ar

27、e not intended to be installed in the protected area (duct, plenum,hood, directly protecting appliances) are exempted from this test provided limitations are included in theinstruction manual.17.2 Each pipe and fitting assembly is to be installed such that the bottommost portion of the lowest fittin

28、gis centered 36 1/2 inch above the bottom of the pan.17.3 The pan is to be square with inside length and width dimensions providing an area of at least 2-1/2ft2(0.23 m2) and an inside depth of at least 4 inch (102 mm). The pan is to be constructed of steel witha minimum wall thickness of 1/4 inch (6

29、.4 mm), with liquid-tight welded joints and provided with a nominal1-1/2 by 1-1/2 inch (38 by 38 mm) angle approximately 3/16 inch (4.8 mm) thick, to reinforce the upperedge. The reinforcing angle is to be continuous around the perimeter of the pan and is to form a turned-outedge flush with the top

30、edge of the pan. The top edge surface so formed is to be approximately 1-3/4 inch(44 mm) in width. The reinforcing angle is to be continuously welded to the outside of the pan at the topedge and tack-welded at the edge of the lower leg of the angle.MARCH 4, 2016 UL 1254F 7UL COPYRIGHTED MATERIAL NOT

31、 AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL17.4 At least 1 inch of heptane is to be placed in the pan, ignited and burn freely for at least 120 seconds.17.5 Following fire exposure, the pipe and fitting assemblies shall be subjected to at least onerepresentative te

32、st in accordance with Flow Distribution Tests in accordance with UL 1254 and theHydrostatic Pressure Test in accordance with UL 1254.18 500 Cycle Operation Test18.1 Each pipe-to-fitting joint of each type and size referenced in the instruction manual shall be attachedand unattached sequentially 500

33、times. When the joining mechanism is integral to the fitting, it isacceptable to use up to five different samples of as-received pipe for up to 100 cycles each provided thesame fitting is tested.Exception: Pipe and fittings that are not intended to be reused after initial installation are exempted f

34、romthis test provided limitations are included in the instruction manual.18.2 After cycling, the pipe-to-fitting joint is to be subjected to an air or nitrogen under-water leakage testat the operating pressure at 70F (21C), and there shall be no leakage from any component as evidencedby air or nitro

35、gen bubbles. Sealing portions of the component are permitted to be cleaned beforeconducting this test. The inlet of the component is to be fitted with a pressure regulating device or otherequivalent means and pressurized to its operating pressure at 70F (21C). The pipe-to-fitting joint is thento be

36、immersed in water and examined for leakage for 1 minute.MARKING19 General19.1 Each fitting shall be legibly and permanently marked by etching or stamping. Marking shall includethe following:a) The manufacturers or private labelers name or identifying symbol,b) Nominal size of the fitting, andc) A di

37、stinctive product identification designation, such as a part number.19.2 Each length of pipe shall be marked in accordance with the nationally recognized standard to whichit is manufactured.MARCH 4, 2016UL 1254F8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT P

38、ERMISSION FROM ULINSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS20 General20.1 A copy of the installation, operation and maintenance instruction manual is to be furnished for useas a reference in the examination and testing of the product.20.2 Detailed instructions for properly installing the p

39、ipe and fittings, including:a) The maximum ambient air temperature for the installation of the pipe and fittings,b) The maximum support spacing for installation of the pipe and fittings,c) Specific limitations, if any, for the location of installation,d) Specific limitations, if any, regarding the reuse of the pipe and fittings, ande) A correlation to the applicable markings to be on the pipe and fittings.MARCH 4, 2016 UL 1254F 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMARCH 4, 2016UL 1254F10No Text on This Page