1、Performance Requirements forWater HammerArrestersAmerican Society of Sanitary EngineeringASSE Standard #1010-2004ASSE Board Approved: FEBRUARY, 2004ANSI Approved: MAY, 2004An American National StandardiWater Hammer ArrestersASSE #1010 - 2004American Society of Sanitary EngineeringWestlake, OhioCopyr
2、ight 2004, 1996, 1982, 1967All rights reserved.Neither this standard, nor any portion thereof, may be reproduced without the written consent of the American Society of Sanitary Engineering.No product may be said to be ASSE approved unless the manufacturer has applied to the ASSE has had his product
3、tested according to the applicable ASSE Standards, and when the product has passed the test, displays the ASSE Seal on the product.Instructions for receiving the authorization to display the Seal are available from ASSEs International Office. Organizations wishing to adopt or list any ASSE Standard
4、should print the ASSE Standard number on the cover page first and in equal or larger type to that of the adopting or listing organization.General Informationii Water Hammer ArrestersASSE #1010 - 2004The foreword is not a part of this standard; however it is offered to provide background infor-mation
5、.Water Hammer shock has long been known to be a destructive force in plumbing water sup-ply systems. Water hammer is that condition which defines the destructive forces, pounding noises and vibration caused by the immediate cessation of water flowing in a pipeline. After years of study on this issue
6、, the Plumbing and Drainage Institute published their findings in 1965 in a publication entitled Standard PDI-WH201 “Water Hammer Arresters.” Water hammer forces can be controlled with a reduction of the intensity of the shock wave. Although some codes permit the use of an air chamber to temper the
7、shock wave, the engi-neering community generally agrees that the installation of an Engineered Water Hammer Arrester to reduce the shock wave intensity. Air chambers are required to be oversized to be effective. Because they are subject to loss of the air cushion with each dissipation of a shock wav
8、e, the chamber must be periodically recharged. The effective approaches to correction of water hammer are twofold. First, the proper sized engineered water hammer arrester must be selected. Second, the arrester must be properly installed. This standard outlines the performance requirements for Water
9、 Hammer Arresters, and de-scribes those performance requirements in terms of methods of testing applicable to all such units. Equivalent materials to those referenced which are intended to demonstrate compliance with these requirements shall be acceptable with proof of equivalence. Common design, ty
10、pes and sizes are defined or stated throughout this document for the basis of standardization with other industry components. Other designs, types and sizes falling outside the scope of this standard which may comply with the intent of the standard will be treated as special require-ments when submi
11、tted for analysis.It is recommended that all devices designed for plumbing systems, especially those which pertain to public health and safety, should be installed by qualified and trained mechanics.Manufacturers who desire certification to this standard from ASSE shall be required to have their pro
12、ducts tested to this standard by an ASSE approved laboratory.The Plumbing and Drainage Institute also offers a certification program to the manufacturer. Any manufacturer, whether or not a member of the PDI, may have their units tested by a qualified independent laboratory for certification in accor
13、dance with PDI certification require-ments. For further information on this program, as well as information as to the use of the PDI Certification Mark and participation in its annual visual inspection and physical test program, contact the Plumbing and Drainage Institute at 45 Bristol Dr., Suite 10
14、1, S. Easton, MA 02375, Phone: (508) 230-3516, FAX: (508) 230-3529.ForewordiiiWater Hammer ArrestersASSE #1010 - 2004Richard J. ProspalProduct Standards Committee ChairmanProspal Consulting Services, Inc.Brunswick, OhioRand H. AckroydRand EngineeringNewburyport, MassachusettsMichael BeckwithState of
15、 Wisconsin Department of CommerceMadison, WisconsinGunnar O. CollinsCollins Backflow Specialists, Inc.Palatine, IllinoisJud CollinsOklahoma State Health DepartmentOklahoma City, OklahomaShannon M. Corcoran ASSE Standards CoordinatorWestlake, OhioA. Richard EmmersonGeneral InterestBuffalo Grove, Illi
16、noisSteven HazzardASSE Staff EngineerWestlake, OhioDale HollowaySGS United States Testing CompanyTulsa, Oklahoma2003-04 Product Standards Com-Michael KobelInternational Association of Plumbing and Mechanical OfficialsWalnut, CaliforniaValentine Lehr, P.E.Lehr AssociatesNew York, New YorkPeter Marzec
17、United Association of Plumbers and PipefittersWashington, D.C.Perry W. Meikle, Jr.Perry W. Meikle Consulting EngineerAntioch, CaliforniaShabbir RawalpindiwalaKohler CompanyKohler, WisconsinLynne Simnick International Code Council, Inc.Country Club Hills, IllinoisJack VilendrePrecision Plumbing Produ
18、cts, Inc.Portland, OregonDavid ViolaPlumbing Manufacturers InstituteSchaumberg, IllinoisJoseph C. Zaffuto, P.E.ASSE Staff EngineerWestlake, Ohioiv Water Hammer ArrestersASSE #1010 - 2004Rand H. AckroydRand EngineeringNewburyport, MassachusettsShannon M. CorcoranAmerican Society of Sanitary Engineeri
19、ngWestlake, OhioSteven HazzardAmerican Society of Sanitary EngineeringWestlake, OhioKen McCoyNIBCO, Inc.Elkhart, IndianaMichael MeagherSioux Chief Manufacturing Co., Inc.Peculiar, MissouriJack VilendrePrecision Plumbing Products, Inc.Portland, OregonBrian WeltmanPrecision Plumbing Products, Inc.Port
20、land, OregonWilliam WhiteheadPlumbing and to eliminate noise. This standard addresses the test methods and performance requirements for water hammer arresters.1.2 Scope1.2.1 DescriptionThis standard applies only to those devices classified as water hammer arresters having a permanently sealed cushio
21、n of water or gas isolated from the water way, and designed to provide continuous protec-tion, without maintenance, against detrimental surge pressures within the water distribution system.1.2.2. Size RangeThe size of the device shall be within the range from Type AA which are used for “point of use
22、” residential appliance applications to Types A through F which are used in applications as defined within Table 1 of this standard.Table 1NPS/CTS1112DN15152025324050feet50.050.050.050.050.050.050.0m15.215.215.215.215.215.215.2psig250.0400.0400.0400.0400.0400.0400.0kPa1723.82760.02760.02760.02760.02
23、760.02760.0psig150.0150.0150.0150.0150.0150.0150.0kPa1034.31034.31034.31034.31034.31034.31034.3AAABCDEFPipe Size Pipe Length Total Pressure -Flow + Surge Less Arrester1Size Max. Reduced Pressure- Flow + Surge with Arrester21. Peak pressure shall be defined as the highest average total pressure measu
24、red over an aver-age 2.5 millisecond portion of the calibration and performance test periods.2. The device shall pass the endurance test by completing 10,000 cycles without the reduced pressure exceeding 160.0 psig (1103.2 kPa) maximum pressure plus tolerance.1.2.3. Pressures1.2.3.1. Hydrostatic Pre
25、ssureThese devices shall be designed to withstand a maximum pressure of at least 150.0 psi (1034.3 kPa).1Water Hammer ArrestersASSE #1010 - 20041.2.3.2. Operating Pressure These devices shall operate at pressures from 0 psi (0 kPa) to 60.0 psi (413.7 kPa).1.2.4. Temperature RangeThese devices shall
26、be capable of performing at temperatures from 33.0 F (0.6 C) to 180.0 F (82.2 C).1.3 Reference StandardsThe following standards, as referenced in this standard, shall be applicable as noted herein. Unless specified, the most current edition of the standards shall apply. ANSI/ASME B1.1 Bolts, Screws
27、and Nuts ANSI/ASME B1.20.1 Pipe Threads ANSI/ASME B1.20.3 Dryseal ThreadsSection II2.0 Test Specimens2.1 Samples Submitted for TestThree (3) assemblies of each type or model and size of device shall be submitted by the manu-facturer. Tests shall be performed in the order listed on one (1) device of
28、each size submitted.2.2 Samples TestedThe testing agency shall select one (1) of each type or model and size of device for the full test.2.3 DrawingsAssembly and installation drawings and other data needed to enable a testing agency to deter-mine compliance with this standard shall accompany the dev
29、ice when submitted for examination and performance testing under this standard.2.4 RejectionFailure of one (1) device shall result in rejection of that type or model and size until the manu-facturer has corrected the fault and submitted new devices for testing.2 Water Hammer ArrestersASSE #1010 - 20
30、04Section III3.0 Performance Requirements and Compliance Testing3.1 Shock Absorbing Capacity Test3.1.1 PurposeThe purpose of this test is to demonstrate the devices ability to limit the maximum line pressure to 150.0 psi (1034.3 kPa) when exposed to the test conditions in Table 1.3.1.2 ProcedureThe
31、test set-up shall subject the device to the full energy imposed by the abrupt stoppage of a 50 foot (15.2 meter) column of water flowing in a standard schedule 40 steel pipe exerting a total pressure not to exceed 250.0 psi (1723.8 kPa) for the AA size and 400.0 psi (2758.1 kPa) for sizes A through
32、F. This test arrangement shall be as shown in Figure 1. In order to insure reproducible test results, the following tolerances shall be maintained.1. Surge valve (21) - flow termination not to exceed 25 milliseconds.2. Flow pressure 0.5 psig ( 3.5 kPa).3. Total pressure 10 psig ( 70.0 kPa) (surge pl
33、us flow)4. Pressure transducer smallest incremental reading shall be 2 psig (13.8 kPa)Each device shall be installed in the test set-up (Item #20 of Figure 1), and shall use the corre-sponding test pipe (Item #15). The ball valve (Item #19) shall be moved to the closed position. The pump shall be en
34、ergized to fill the system with water and the system, including gauges, valves and fittings, shall be purged of air. The test pipe shall be fully supported to avoid high spots to prevent entrapment of air. The device shall then be filled with water in the inverted position. In devices containing an
35、orifice, the fill tube shall be inserted in the orifice to eliminate the pos-sibility of trapping air in the bellows convolutions. The filled inverted unit shall then be capped with a thin plate and, with the plate held firmly in place, shall be rotated to the normally installed position and shall b
36、e placed on the brimming ball valve fitting. The plate shall be slipped out from its position between the device and the ball valve as the test unit is threaded into the ball valve and secured in place. The test conditions shall then be established. The pump (Item #5) shall be energized to circulate
37、 water through the system with ball valve (Item #17) open to the gauge (Item #18). Valves (Item #14) and (Item #23) shall be adjusted to obtain the approximate flow rate required to maintain the pressure specified in Table 1 on gauge (Item #18). Ball valve (Item #17) shall be closed isolating the pr
38、essure gauge and ball valve (Item #19) shall be opened to expose the test unit to the system pressure. The cycle timer (Item #33) and hydraulic pump motor (Item #29) shall be energized and final adjustment shall be made to the water flow with valve (Item #24) to the total pressure specified in Table
39、 1. The maximum total pressure shall be recorded for five (5) cycles after the hydraulic system temperature has stabilized. The average of these readings shall be used for determining compliance. For AA size, the total pressure in Table 1 for test calibration shall equal 250.0 psig (190.0 psig surge
40、 plus 60.0 psig flow) 1723.8 kPa (1310.1 kPa surge plus 413.7 kPa flow).3.1.3. CriteriaFailure to comply with the requirements of Table 1 shall result in a rejection of the device.3.2 Endurance Test3.2.1 PurposeThe purpose of this test is to demonstrate the devices ability to withstand a 10,000 cycl
41、e endur-ance test with cold and hot water.4 Water Hammer ArrestersASSE #1010 - 20045Water Hammer ArrestersASSE #1010 - 20043.2.2. ProcedureThe device shall be installed as described in Section 3.1.2. The device shall be subjected to 5,000 cycles of shock testing with water at ambient temperature. Th
42、e same device shall be subjected to an additional 5,000 cycles of shock testing with water at 180.0F (82.2 C). The maximum total pressure shall be recorded after the 5,000th and 10,000th cycle. The average of these readings shall be used for determining compliance.3.2.3. CriteriaFailure to comply wi
43、th the requirements of Table 1 shall result in a rejection of the device.Figure 1Configuration of Testing Components to Evaluate Pressure Surges Test Set-upListing of Equipment2278101213141128271518171920162123243033313225292134266598A1 A2The use of the instrumentation, shown in Figure 1, does not p
44、reclude the use of comparable manual or computer controlled systems to automatically maintain test conditions, record performance of the device and terminate testing upon completion of the required number of cycles or upon failure of the test unit, or other system components.1. Sump tank 4 feet (1.2
45、 m) diameter x 4 feet (1.4 m) high - 450.0 gallons (1703.3 liter)2. Water heater3. 2 inch (50.8 mm) gate valve4. 1 inch (38.1 mm) gate valve5. 160 GPM (605.6 L/min), 110.0 psig (758.5 kPa) Centrifugal Pump6. Tee and elbow for return7. 1 inch (38.1 mm) pipe8. Two 2 inch (50.8 mm) gate valves for inle
46、t to pneumatic tanks9. Two 30 gallon (113.6 liter) pneumatic water tanks 12 inch (304.8 mm) diameter) equipped with a 24 inch (609.6 mm) sight glass10. inch (12.7 mm) air line and globe valve11. 3 inch (76.2 mm) gate valves12. 10 inch (254 mm) return bend 36 inch (914.4 mm) between centers13. Float
47、vent air bleed installed at top of return bend14. 2 inch (50.8 mm) gate valve15. Test length steel pipe sizes 2 inch (50.8 mm), 1 inch (38.1 mm), 1 inch (31.8 mm), 1 inch (25.4 mm), inch (19.1 mm), and inch (12.7 mm) to fit between A1 and A216. Pressure transducer, kistler Model 212B3 Piezatron17. B
48、all valve18. 100.0 psig (689.5 kPa) flow pressure gauge19. Ball valves, size same as outlet of test unit20. Device on test (water hammer arrester) 21. 2 inch (50.8 mm) hydraulically actuated surge valve22. 10 inch (254 mm) return bend 36 inch (914.4 mm) between centers23. 2 inch (50.8 mm) metering v
49、alve24. inch (12.7 mm) metering valve25. Flow meter connected to readout26. 2 inch (50.8 mm) pipe line27. Oscilloscope28. Digital pressure readout29. Hydraulic pump30. Hydraulic solenoid valve31. Oil reservoir32. Oil cooler33. Cycle timerSection IV4.0 Detailed Requirements 4.1 MaterialsSolder and fluxes containing lead in excess of 0.2% shall not be used in contact with potable water. Metal alloys in contact with potable water shall not exceed 8% lead.4.2 Threads4.2.1 Bolts, Screws and NutsAll bolts, screws and nuts shall conform to ASME/ANSI B1.1.4.
