19-7_Edtn_2006.pdf

AN AMERICAN NATIO NAL STANDARDHydromassage Bathtub AppliancesASME A112.19.7-2006(Revision of ASME A112.19.7M-1995)Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.ASME A112.19.7-2006(Revision of ASME A112.19.7M-1995)HydromassageBathtubAppliancesAN AMERICAN NATIONAL STANDARDThree Park Avenue New York,NY 10016Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Date of Issuance:June 2,2006This Standard will be revised when the Society approves the issuance of a new edition.There willbe no addenda issued to this edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard.Interpretations are published on the ASME website under the Committee Pages athttp:/www.asme.org/codes/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 NationalStandards.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 forpublic review andcomment thatprovides an opportunityfor additional publicinput 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 position with respect to the validity of any patent rights asserted in connection with anyitems mentioned in this document,and does not undertake to insure anyone utilizing a standard against liability forinfringement of any applicable letters patent,nor assume any such liability.Users of a code or standard are expresslyadvised that determination of the validity of any such patent rights,and the risk of infringement of such rights,isentirely their 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 those 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 the prior written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue,New York,NY 10016-5990Copyright 2006 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.CONTENTSForeword.ivCommittee Roster.vCorrespondence With the A112 Committee.vi1General.12General Requirements.23Testing.34Marking and Labeling.13Figures1Prohibited Screw Head.32Shear Test.63Test Tank for Suction Fitting Analysis.74Baffle Design.85Support Fixture for Pull Test.96Test Equipment With Puller Assembly.107Assembly of Cylinder to Support Member.118Suction Fittings Testing Protocol.12Tables1Chlorine Concentration for Test Determination.42Residual Water Comparison Table.53Parameters for Random Sampling.13Nonmandatory AppendixASuction Fitting Test Form.15iiiCopyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.FOREWORDInthelate1970s,thewhirlpoolbathtubappliancewasintegratedintomodernplumbingsystemsas a new selection for bather comfort in the bathroom.The popularity of this product increaseddramatically,and it is now a common option for the modern bath.The initial work on a safety standard for whirlpool bathtub appliances was undertaken by acommittee of the International Association of Plumbing and Mechanical Officials(IAPMO).Thecommittees activity resulted in the Product Standard PS 32,Jetted Whirlpool Bathtubs,whichwas used as a benchmark for the performance of such appliances.At IAPMOs suggestion,the PS 32 standard was offered to ASME for conversion into a nationalconsensus standard.In order to undertake this challenge,a Task Group of A112 Panel 19 wasformed to write this Standard.The original edition of this Standard was approved by the American National StandardsInstitute(ANSI)onNovember23,1987.Thesecondrevision,whichwasreleasedin1995,amendedthe sampling procedures.This current revision contains criteria for the complete testing of suctionfittings