1、AN AMERICAN NATIONAL STANDARDASME A112.19.17-2010(Revision of ASME A112.19.17-2002)Manufactured Safety Vacuum Release Systems (SVRS) for Residential and Commercial Swimming Pool, Spa, Hot Tub, and Wading Pool Suction SystemsThree Park Avenue New York, NY 10016 USAINTENTIONALLY LEFT BLANKASME A112.19
2、.17-2010Revision of ASME A112.19.17-2002Manufactured SafetyVacuum ReleaseSystems (SVRS) forResidential andCommercial SwimmingPool, Spa, Hot Tub,and Wading Pool SuctionSystemsAN AMERICAN NATIONAL STANDARDThree Park Avenue New York, NY 10016 USADate of Issuance: June 30, 2010ThisStandardwillberevisedw
3、hentheSocietyapprovestheissuanceofanewedition.Therewillbe no addenda issued to this edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard. Periodically certain actions of the ASME A112 Committee may be published as Cases.Cases and interpreta
4、tions are published on the ASME Web site under the Committee Pages athttp:/cstools.asme.org as they are issued.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the criteria for American Nationa
5、lStandards. The Standards Committee that approved the code or standard was balanced to assure that individuals fromcompetent and concerned interests have had an opportunity to participate. The proposed code or standard was madeavailable for public review and comment that provides an opportunity for
6、additional public input from industry,academia, regulatory agencies, and the public-at-large.ASME does not “approve,” “rate,” or “endorse” any item, construction, proprietary device, or activity.ASME does not take any positionwithrespect to the validityof any patent rights assertedin connectionwith
7、any itemsmentioned in this document, and does not undertake to insure anyone utilizing a standard against liability forinfringement of any applicable letters patent, nor assumes any such liability. Users of a code or standard are expresslyadvised that determination of the validityof anysuch patent r
8、ights, and the riskof infringement of such rights, is entirelytheir own responsibility.Participation by federal agency representative(s) or person(s) affiliated with industry is not to be interpreted asgovernment or industry endorsement of this code or standard.ASME accepts responsibility for only t
9、hose interpretations of this document issued in accordance with the establishedASME procedures and policies, which precludes the issuance of interpretations by individuals.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise, without theprior written
10、permission of the publisher.The American Society of Mechanical EngineersThree Park AvenueNew York, NY 10016-5990Copyright 2010 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.TABLE OF CONTENTSForeword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ivASME A112 Committee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vCorrespondence With the A112 Committee . . . . . . . . . . . . . . . .
12、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Classification of Devices . . . . . . . . . . . . . . . . . . . . . . . .
14、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 Marking and Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Figures1 Vacuum Response Versus Time Test SetUp . . . . . . . . . . . . . . . . . . . . .
15、. . . . . . . . . . . . . . . . . . . . . . 32 Wave Form Graph Plotting Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Test Actuator Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16、 . . . . . . . . . . . . . 5iiiFOREWORDThis Standard establishes requirements for manufactured Safety Vacuum Release System (SVRS) devices, forinstallation inresidential andcommercialswimming pool, spa,hottub,and/or wadingpool suction systems. Itisintendedto serve as a guide for producers, distribut
17、ors, architects, code officials, contractors, installers, and end users; to promoteunderstanding regarding materials, manufacture, installation and performance, and to provide a means for identifyingdevices complying with this Standard.The U.S. Consumer Product Safety Commission (CPSC) is aware of 1
18、38 cases of swimming pool and spa suction outletentrapments, including 35 confirmed deaths, betweenJanuary 1985 and 2001. CPSC reports that some of the deaths werethe result of drowning after the body, or a limb, was held against the suction outlet by the suction of the circulation pump.Of the 35 de
19、aths, CPSC reports that 15 deaths were due to hair entrapment, 15 due to body entrapment, and five deathsdue to entrapment of an unknown type.These incidents typicallyinvolvedolderchildren(8 yrto16 yrofage) with an averageage ofabout 10yr. In somecases,it appeared that the child was playing with the
20、 open suction outlet, inserted a hand or foot into the pipe, and then becametrapped by the resulting suction. There are potentially many different circumstances of design and maintenance that canproduce the conditions for this hazard. Body entrapment cases can occur in either pools or spas. Experien
21、ce suggests thatany open suction outlet, or any flat grating that a body or limb can cover completely, coupled with a plumbing layout thatallows sufficient buildup of suction if the suction outlet is blocked, can produce the conditions that result in bodyentrapment.The products covered under this St
22、andard may generally be divided into three types of products.(a) Nonelectric SVRS Devices. Available data suggests that a (SVRS) Nonelectric Device may effectively eliminate bodyentrapments. A child playing in the immediate vicinity of an SVRS Nonelectric Device-protected suction outlet will causeth
23、edevice to activateupon sealing off the suction outlet fitting. The device isintended to eliminate the highvacuum forcesat the protected suction outlet, by venting air into the suction system and breaking the circulating pump suction, therebyavoiding body entrapment.(b) Electrical Intervention SVRS
24、Devices. An SVRS electrical device typically includes a monitor or switch that respondsto a sudden rise in pump suction vacuum by turning off the pump, and/or opening an electrically operated atmosphericvent valve.(c) Vent Tube SVRS Devices. A vent tube is connected to the main suction outlet line b
25、etween the suction outlet and thepumpandwouldbeopentoatmosphere.The lawsofphysicsrequiretheventtubetofillwithwatertoalevelequaltothatof the pool at a static condition. Should the suction outlet become clogged or obstructed, the pump would then draw thewater from the vent until air is introduced into
26、 the system and the suction is thereby broken.Some States require and others are considering emergency pump cut-off switches located in view of the pool or spa. Atthe present time these switches are generally located in the electric equipment room, and are in the line of sight of theapparatus as opp
27、osed to the line of sight of the pool or spa. This form of manual entrapment avoidance does not provideprotection for persons swimming alone and it is not covered by this Standard.This Standard establishes a safe “reaction time limit” for these devices as well as set forth material and performancere
28、quirements that provide reasonable safety measures against bather entrapment when these devices are installed as acomponent of a pool circulation system.The responsibility for verification of the devices performance on any circulation system is the responsibility of theregistered design professional
29、.WARNING: Due to the lack of physiological data, it cannot be concluded that a device of this type referred to hereafter as a SafetyVacuum Release System (SVRS) will eliminate the potential for disembowelment.This revision is intended to allow more uniform testing results and provide more realistic
30、testing requirements.Suggestions for improvement of this Standard are welcome. They should be sent toThe American Society of Mechanical EngineersStandardization and Testing DepartmentSecretary, A112 Standards CommitteeThree Park AvenueNew York, NY 10016-5990This revision was approved as an American
31、National Standard on April 13, 2010.ivASME A112 COMMITTEEStandardization of Plumbing Materials and Equipment(The following is the roster of the Committee at the time of approval of this Standard.)STANDARDS COMMITTEE OFFICERSD. W. Viola, ChairS. A. Remedios, Vice ChairF. Constantino, SecretarySTANDAR
32、DS COMMITTEE PERSONNELR. H. Ackroyd, Rand EngineeringS. R. Aridi, NSF InternationalJ. A. Ballanco, J. B. Engineering however, they should not containproprietary names or information.Requests that are not in this format will be rewritten in the appropriate format by the Committeeprior to being answer
33、ed, which may inadvertently change the intent of the original request.ASME procedures provide for reconsideration of any interpretation when or if additionalinformation that might affect an interpretation is available. Further, persons aggrieved by aninterpretation may appeal to the cognizant ASME C
34、ommittee or Subcommittee. ASME does not“approve,” “certify,” “rate,” or “endorse” any item, construction, proprietary device, or activity.Attending Committee Meetings. The A112 Standards Committee schedules meetings as needed,which are open to the public. Persons wishing to attend any meeting should
35、 contact the Secretary ofthe A112 Standards Committee. The A112 home page contains information on future meeting datesand locations.vi1 GENERAL1.1 ScopeThis Standard establishes general requirements, dimen-sions and tolerances, materials, installation instructions,testing requirements, and markings
36、and identification forSVRS devices. SVRS devices are intended to be utilized onpool, spa, hot tub, and/or therapy unit suction systems.SVRS devices covered under this Standard are designed torelieve high vacuum occurrences that cause human bodyor body part suction entrapment.Demonstration of complia
37、nce with this Standard ismerely an indication that the product meets the perfor-mance requirements and specifications contained in thisStandard.The provisions of this Standard are not intended toprevent the use of any alternative material or method ofconstruction, provided any such alternative meets
38、 theintent and requirements of this Standard.1.2 Units of MeasurementValues are stated in U.S. Customary units and in theInternational System of Units (SI). The U.S. Customaryunits shall be considered as the standard.In this Standard, gallons (U.S. liquid) per minute isabbreviated as “gpm” and liter
39、s (metric liquid) per minuteis abbreviated as “L/min”.1.3 ReferencesThe following documents form a part of this Standard tothe extent specified herein. Unless otherwise specified, thelatest edition shall apply.ASME A112.19.8b2009, Suction Fittings for Use inSwimming Pools, Spas, Hot Tubs, and Whirlp
40、ool BathAppliances.ASME B1.20.1, Pipe Threads, General Purpose, InchPublisher: The American Society of Mechanical Engineers(ASME) Three Park Avenue, New York, NY 10016-5990;Order Department: 22 Law Drive, P.O. Box 2900 Fair-field, NJ 070072900, (www.asme.org)ASTM D 2466, Poly (Vinyl Chloride) (PVC)
41、Plastic PipeFittings, Schedule 40ASTM D 2468, AcrylonitrileButadieneStyrene (ABS)Plastic Pipe Fittings, Schedule 40Publisher: American Society for Testing and Materials(ASTM International), 100 Barr Harbor Drive, P.O. BoxC700, West Conshohocken, PA 19428-2959(www.astm.org)NSF50, Suction System Compo
42、nents For Swimming Pools,Spas, Tubs, And WhirlpoolsPublisher: National Science Foundation (NSF Interna-tional), 789 North Dixboro Road, Ann Arbor, MI 48105(www.nsf.gov)UL 1081, Standard For Safety For Swimming Pool Pumps,Filters, and ChlorinatorsPublisher: Underwriters Laboratories, Inc. (UL), 333Pf
43、ingsten Road, Northbrook, IL 60062-2096()1.4 Definitionsblocking element: the part used to simulate an entrappedvictim constructed of a 12 in. (305 mm) 12 in. (305 mm)(tolerance = 0.25 in.) maximum 5 in. (127 mm) thickclosed cell foam block with a covering of Buna-N rubbersheet having a minimum of1/
44、8in. (3 mm) thickness andShore A durometer 60 5 or equivalent whose combinedbuoyancy force is between 14.0 lbf (62.2 N) and 15.0 lbf(66.7 N).cycle: a sequence where the SVRS activates, latches, orlocks out in the vented or safe position following a highvacuum occurrence and then is automatically or
45、manuallyreset.flooded suction:apool, spa,hottub,wadingpool,orsimilarappliance whose circulation system pump suction inlet orinlets are located below the static water level in theappliance (flooded suction).high vacuum occurrence: an event where the operatingvacuum normally present within a pool circ
46、ulation systemincreases due to a full suction outlet blockage.Safety Vacuum Release System (SVRS): a system or devicecapable of automatically providing vacuum release at asuction outlet caused by a high vacuum occurrence due toa suction outlet flow blockage. The device or systemprovides vacuum relea
47、se with or without suction fittingcover(s) in place.suction lift: a pool, spa, hot tub, wading pool, or similarappliance whose circulation system pump suction inlet orinlets are located above the static water level in theappliance (nonflooded suction).suction outlet: an appurtenance within a pool, s
48、pa, hot tub,wading pool, or similar appliance for conveying water intoa circulating system; i.e., a pump suction.suction system: that portion of the circulation pipinglocated between the pool suction outlet and the inlet sideof the pump and usually includes the following: mainsuction outlet piping,
49、skimmer piping, and/or vacuumpiping.2 REQUIREMENTS2.1 General2.1.1 Fieldadjustable SVRS devices when provided withavacuum gauge shall have a maximum graduation of1/2in.(13 mm) Hg increments to aid in calibration and troubleshooting.1ASME A112.19.17-20102.1.2 Where SVRS devices are capable of field adjust-ment to sitespecific hydraulic conditions, the means foreffecting adjustments shall be tamper resistant, so thatnonqualified personnel cannot make adjustments inad-vertently.2.1.3 SVRS devices shall be designed for onsite testing.2.1.4 SVRS devices shall act
