1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMay 27, 20141UL 2581Outline of Investigation for Hydraulic Surge Suppressors for Water BasedFire Protection SystemsIssue Number: 1May 27, 2014Summary of TopicsThis is the first issue of the Outli
2、ne of Investigation for Hydraulic SurgeSuppressors for Water Based Fire Protection Systems, UL 2851COPYRIGHT 2014 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMAY 27, 2014UL 25812No Text on This PageUL COPYRIGH
3、TED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .42 Units of Measurement .43 Undated References 44 Glossary .4CONSTRUCTION5 Pressure Vessels .46 Rated Pressure .57 Materials .57.1 Elastomeric parts .57.2 Metallic materials .57
4、.3 Coatings for ferrous vessels .57.4 Flanges .5PERFORMANCE8 Leakage Test .59 Hydrostatic Strength Test 610 Elastomeric parts 610.1 Non-reinforced bladder material .610.2 Reinforced bladder parts .711 One Year Leakage Test 712 Cycling Test .813 Operational Tests 814 Tests on Organic Coating Material
5、s 914.1 General 914.2 Air oven exposure 1014.3 Water immersion .1014.4 Sodium chloride immersion 1114.5 Potassium biphthalate immersion .1114.6 Sodium carbonate immersion 1115 Impact Tests .12MANUFACTURING AND PRODUCTION TESTS16 General 12MARKING17 General 12INSTRUCTIONS18 Installation and Design In
6、structions (Owners Manual) .13MAY 27, 2014 UL 2581 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements cover hydraulic surge suppressors used in water based fire protection systems.1.2 The hydraulic surge
7、 suppressors covered by these requirements are intended to absorb transientpressure waves caused by starting and stopping the fire pump and rapid closing of valves in firesuppression systems. They are intended to be sized to the specific system piping and pressurized inaccordance with the manufactur
8、ers Installation and Design instructions.2 Units of Measurement2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory orapproximate information.3 Undated References3.1 Any undated reference to a code or standard appearing in the requirements of this Outline
9、ofInvestigation shall be interpreted as referring to the latest edition of that code or standard.4 Glossary4.1 For the purpose of this Outline of Investigation, the following definitions apply.4.2 CORROSION-RESISTANT MATERIAL A material having resistance to corrosion equivalent to orexceeding that o
10、f a brass or bronze alloy, or series 300 stainless steel.4.3 RATED PRESSURE The maximum anticipated static pressure that the hydraulic surgesuppressor is designed to operate.CONSTRUCTION5 Pressure Vessels5.1 The pressure vessel portion of the hydraulic surge suppressor shall be designed and construc
11、ted inaccordance with the section, Pressure Vessels, in ASME International Boiler and Pressure Vessel Code.5.2 The water inlet strainer to the surge suppressor shall be fabricated from corrosion resistant materialor coated in accordance with 7.3.MAY 27, 2014UL 25814UL COPYRIGHTED MATERIAL NOT AUTHOR
12、IZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL6 Rated Pressure6.1 Hydraulic surge suppressors shall be constructed for a minimum rated pressure of 175 psig (12 Bar).7 Materials7.1 Elastomeric parts7.1.1 A rubber part or synthetic elastomers of such type used in a hydraulic s
13、urge suppressor assemblyis to be judged on the basis of tensile strength, elongation, and resistance to aging and cycling inaccordance with Elastomeric Parts, Section 10 and the Cycling Test, Section 12.7.2 Metallic materials7.2.1 Hydraulic surge suppressor bodies fabricated from copper alloys shall
14、 contain not more than 15percent zinc.7.3 Coatings for ferrous vessels7.3.1 Hydraulic surge suppressor bodies fabricated from ferrous materials that are in contact with wateror antifreeze solution shall be protected by hot-dip galvanizing in accordance with the StandardSpecification for Zinc Coating
15、 (Hot-Dip) on Iron and Steel Hardware, ASTM A153/A153M, or protectedwith organic coatings that have been subjected to the Tests on Organic Coating Materials, Section 14.7.4 Flanges7.4.1 Flanges shall be compatible with the rating of the surge suppressors and the flanges on thesprinkler system piping
16、.PERFORMANCE8 Leakage Test8.1 Representative sizes (pipe connection sizes and volumes) of hydraulic surge suppressor assembliesshall withstand for 1 minute without leakage through the body, bladder or connections, a hydrostaticpressure of two times the rated pressure.8.2 The pressure retaining parts
17、, including the body, bladder, flanges, connections and valves, of ahydraulic surge suppressor shall be subjected to the hydrostatic pressure of two times the rated pressure.The pneumatic pressure in the elastomeric diaphragm shall be pressurized to the pressure recommendedby the manufacturer prior
18、to applying the hydraulic test pressure.MAY 27, 2014 UL 2581 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL9 Hydrostatic Strength Test9.1 Representative sizes (pipe connection sizes and volumes) of hydraulic surge suppressor assembliesshall
19、 withstand for 5 minutes without rupture, a hydrostatic pressure of four times the rated pressure.9.2 The pressure retaining parts of a hydraulic surge suppressor shall be subjected to the hydrostaticpressure. The pneumatic pressure in the elastomeric diaphragm shall be permitted to be relieved or t
20、hebladder removed before exposure to the test pressure.10 Elastomeric parts10.1 Non-reinforced bladder material10.1.1 A non-reinforced elastomeric part used as a bladder material or to provide a seal shall have thefollowing properties when tested as specified in the Standard for Gaskets and Seals, U
21、L 157.a) For silicone rubber (having poly-organo-siloxane as its constituent characteristic), a minimumtensile strength of 500 psi (3.4 MPa) and a minimum ultimate elongation of 100 percent.b) For natural rubber and synthetic rubber other than silicone rubber, a minimum tensilestrength of 1500 psi (
22、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 tensile set; minimum tensile strength and elongationafter oven aging, and hardness after oven aging,
23、all as specified in UL 157. The maximumservice temperature used to determine the oven time and temperature for oven aging shall be140F (60C).d) For hydraulic surge suppressors intended for use with antifreeze solutions with elastomericinternal parts that contact antifreeze solutions, sample elastome
24、ric parts shall be exposed to theantifreeze solution having a concentration to prevent freezing at minus 40F (minus 40C). Thesamples shall be exposed to this solution for 60 days at 158 2F (70 1C) and subjected to(a) and (b) above and the Cycling Test, Section 12.10.1.2 The Standard for Gaskets and
25、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 diameters of less then 1 inch (25.4 mm). The material tested is to be the same as that usedin the product, regard
26、less of whether finished elastomeric parts or sheet or slab material is tested.MAY 27, 2014UL 25816UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL10.2 Reinforced bladder parts10.2.1 A reinforced elastomeric diaphragm or bladder material shall
27、:a) Be capable of being flexed by hand when held by the thumbs and forefingers and withouttools.b) Have a hydrostatic resistance not less than 85 percent of the original as received valuewhen tested in accordance with 10.2.2 and under conditions specified in item (c) below, andc) Show no signs of de
28、terioration that could affect performance when subjected for 60 days to:1) Air at 158 2F (70 1C), and2) For material intended to be in contact with antifreeze solutions, it shall be immersedin a solution having a concentration to prevent freezing at minus 40F (minus 40C).The samples shall be exposed
29、 to this solution for 60 days at 158 2F (70 1C) andsubjected to (a) and (b) above and the Cycling Test, Section 12.10.2.2 Sample diaphragm material shall be placed between two circular 3-inch diameter metal clamps.The center of the clamps shall have a 1-3/16 inch diameter hole where the pressure is
30、applied to one sideof the material. The sample is pressurized with water, removing all air. The pressure is then increased ata uniform rate not exceeding 2.8 psi/s (19 kPa/s) until the water leaks through the sample or the materialruptures. The hydrostatic resistance shall be determined by observing
31、 the maximum pressure attainedbefore leakage or rupture of the diaphragm material.11 One Year Leakage Test11.1 Three samples of a representative size hydraulic surge suppressor shall be subjected to a leakagetest for one year without signs of leakage.11.2 The hydraulic surge suppressor shall be pres
32、surized to the recommended pneumatic pressure. Theassembly is then to be filled with water and pressurized with nitrogen to 175 psig (12 Bar).11.3 The pneumatic pressure inlet shall be connected to a calibrated pressure gauge, and the assemblyshall be conditioned for 24 hours to allow the pressure t
33、o stabilize at a temperature of 70 5F (21 3C).The assembly shall be stored at for one year, during which, the pressure in the assembly is to beobserved after one, three, six, and twelve months. There shall be no leakage as indicated by a reductionin the pressure of not more than 2 psig (14 kPa).MAY
34、27, 2014 UL 2581 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL12 Cycling Test12.1 A representative hydraulic surge suppressor shall withstand the effects of variable pressure for 3000cycles without leakage, tears or breaches to the device.
35、12.2 If the surge suppressor is intended for use with antifreeze solutions and the device is equipped witha bladder, then the bladder exposed for 60 days to the antifreeze solution as described in the ElastomericParts Test, Section 10, shall be installed in the surge suppressor and subjected to the
36、test in 12.1.12.3 The hydraulic surge suppressor shall be pressurized to the recommended pre-charge pneumaticpressure. The assembly is then to be filled with water and pressurized from zero to twice the ratedpressure for 3000 cycles. The cycling rate shall be 1 to 60 cycles per minute for sizes thro
37、ugh 20 gallons(76 liters) and not less than 1 cycle per 2 minutes for sizes larger than 20 gallons. The cycling flow rateshall not be less than the flow rate of 5 gallons per minute (38 liters per minute) multiplied by the capacityin gallons.12.4 If the device is equipped with a bladder, it shall be
38、 removed and examined for tears or breaches atthe conclusion of 3000 cycles.13 Operational Tests13.1 One representative hydraulic surge suppressor shall be used to verify the manufacturersrecommendations and sizing calculations for effective surge suppression.13.2 The hydraulic surge suppressor is t
39、o be connected to piping to simulate the intended installation,using a hydraulic piping system capable of water flow velocities of at least 18 feet/second (5.5meters/second), a check valve at the inlet of the system, a fast closing valve at the end of the system,pressure transducers with an acquisit
40、ion time of not more than 0.001 second and a data acquisitionsystem capable of reading the peak pressure values generated.13.3 Pressure transients are to be generated into the system by abruptly closing the fast closing valvewith the hydraulic surge suppressor in place and with the hydraulic surge s
41、uppressor removed from thesystem.13.4 The data generated shall be used to verify the manufacturers recommendations for the hydraulicsurge suppressor tested for the conditions tested.This is generated text for figtxt.MAY 27, 2014UL 25818UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION
42、ORDISTRIBUTION WITHOUT PERMISSION FROM UL14 Tests on Organic Coating Materials14.1 General14.1.1 Organic coating material used to protect ferrous bodies shall show no signs of disbondment orblistering when tested as specified in 14.2 14.6 and the Impact Tests, Section 15, shall show noevidence of ba
43、se metal corrosion outside the scribed area when tested as specified in 14.5, and shallshow no signs of cracking when tested as specified in 15.1. For these purposes, cracking does notinclude surface crazing.Figure 13.1Operational test apparatusMAY 27, 2014 UL 2581 9UL COPYRIGHTED MATERIAL NOT AUTHO
44、RIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL14.2 Air oven exposure14.2.1 Four sample specimens of combined coating material/base material, each measuring 4 by 4inches (102 by 102 mm), are to be used for this test. The thickness of the coating material and basematerial are
45、 to be representative of the thickness used in the hydraulic surge suppressor construction. Thespecimens are to be prepared in a manner that duplicates the hydraulic surge suppressor construction(surface roughness, application procedure, and curing time).14.2.2 The specimens are to be subjected to a
46、ir-oven aging at 212 2F (100 1C), or at thetemperature determined in 14.2.4, as appropriate, for 180 days.14.2.3 Following the exposure, the test specimens are to be visually examined for any evidence ofdisbondment or blistering of the coating.14.2.4 If a coating material does not withstand the temp
47、erature specified in 14.2.2 without excessivedeterioration, an air-oven aging test at a lower temperature for a longer period of time is to be applied. Ifa coating material is capable of withstanding a higher temperature than that specified in 14.2.2 withoutexcessive deterioration, an air-oven aging
48、 test at a higher temperature for a shorter period of time, but notless than 30 days, is to be applied. The duration of exposure is to be calculated from the followingequation:D = (184,000)e0.0693tin which:D is the test duration in dayst is the test temperature, degrees C14.3 Water immersion14.3.1 F
49、our sample specimens of combined coating material/base material, each measuring 4 by 4inches (102 by 102 mm), are to be used for this test. The thickness of the coating material and basematerial are to be representative of the thickness used in the hydraulic surge suppressor construction. Thespecimens are to be prepared in a manner that duplicates the hydraulic surge suppressor construction(surface roughness, application procedure, and curing time).14.3.2 On each specimen a X is to be scribed with a sharp instrument through the coating mater
