1、Dielectric Pipe Unions 1ASSE 1079-2012Performance Requirements forDielectric Pipe UnionsAmerican Society of Sanitary EngineeringASSE Standard #1079-2012ASSE Board Approved: July, 2012ANSI Approved: August, 2012An American National StandardDielectric Pipe Unions iASSE 1079-2012General InformationNeit
2、her 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 listed unless the manufacturer has applied to ASSE, has had its product tested according to the applicable standards, the produc
3、t has passed the test and displays the ASSE Seal on the product.Instructions for receiving authorization to display the ASSE Seal are available from ASSEs International Office. Organizations wishing to adopt or list any ASSE Standard should print the ASSE Standard number on the cover page first and
4、in equal or larger type to that of the adopting or listing organization.American Society of Sanitary EngineeringWestlake, OhioCopyright 2012, 2005All rights reserved.ii Dielectric Pipe UnionsASSE 1079-2012Dielectric Pipe Unions iiiASSE 1079-2012ForewordThis foreword shall not be considered a part of
5、 the standard. However, it is offered to provide background information.ASSE standards are developed in the interest of consumer safety.The American Society of Sanitary Engineering is dedicated to the preservation of public health and safety through its guiding principle, “Prevention Rather Than Cur
6、e.”ASSEs Standards Program systematically evaluates new technologies through formal requests and addresses the development and promulgation of performance standards designed to safeguard public health and safety.Standards for the performance of plumbing system components are considered by the Americ
7、an Society of Sanitary Engineering to be of great value in the development of improved plumbing systems for the increased protection of public health and safety.Dielectric pipe unions are designed to prevent stray currents in piping systems. These stray currents can come from dissimilar piping mater
8、ials or improper grounding of electrical equipment. This standard provides guidance in the construction of pipe unions that incorporate electrical insulating properties to reduce the accelerated corrosion that can result from galvanic and stray currents.Although material specifications are detailed
9、within Section 4.1 of this standard, it is the responsibility of the manufacturer and the installer to comply with the relevant jurisdictional requirements.The working group, which developed this standard revision, was set up within the framework of the Product Standards Committee of the American So
10、ciety of Sanitary Engineering.Recognition is made of the time volunteered by members of this working group.The standard does not imply ASSEs endorsement of a product which conforms to these requirements.Compliance with this standard does not imply acceptance by any code body.Plumbing codes mandate h
11、ow and where these devices are installed. However, this standard was promulgated using a specific set of installation requirements and conditions for the purpose of providing reasonable performance requirements and compliance testing.iv Dielectric Pipe UnionsASSE 1079-2012It is recommended that thes
12、e devices be installed consistent with local codes by qualified and trained professionals.This standard was promulgated in accordance with procedures developed by the American National Standards Institute (ANSI).This edition of the standard was approved by the ASSE Board of Directors on July 3, 2012
13、 as an ASSE standard.Dielectric Pipe Unions vASSE 1079-2012Joseph Fugelo, ChairmanLabov Co.Philadelphia, PennsylvaniaRand AckroydRand Technical Consulting, LLCNewburyport, MassachusettsWilliam Briggs Jr.MGJ AssociatesNew York, New YorkMaribel CamposICC Evaluation ServicesWhittier, CaliforniaJudson C
14、ollinsJULYCOMannford, OklahomaRon GeorgePlumb-Tech Design & Consulting Services, LLCNewport, MichiganSteve HazzardASSE Staff EngineerWestlake, OhioJohn F. Higdon P.E.Apollo Valves / Conbraco Industries, Inc.Matthews, North Carolina2012 Product Standards Committee Jim Kendzel, MPH, CAEAmerican Societ
15、y of Plumbing EngineersDes Plaines, IllinoisChuck LottPrecision Plumbing ProductsPortland, OregonPeter MarzecUnited Association of Plumbers and PipefittersPearl River, New YorkAbraham MurraIAPMO R&TOntario, CaliforniaBrad NollWilkins / A Division of ZurnPaso Robles, CaliforniaThomas PitcherelloState
16、 of New JerseyBordentown, New JerseyShabbir RawalpindiwalaKohler CompanyKohler, WisonsinTsan-Liang Su, PhDStevens Institute of TechnologyHoboken, New Jerseyvi Dielectric Pipe UnionsASSE 1079-2012Ken Van Wagnen, ChairmanASSE Standards CoordinatorWestlake, OhioMaribel CamposICC Evaluation ServicesWhit
17、tier, CaliforniaSteve HazzardASSE Staff EngineerWestlake, Ohio1079 Working GroupSara MarxenASSE Compliance CoordinatorWestlake, OhioTsan-Liang Su, PhDStevens Institute of TechnologyHoboken, New JerseyRobert TesarASSE Seal Control BoardIndependence, OhioDielectric Pipe Unions viiASSE 1079-2012Table o
18、f ContentsSection I . 11.0 General . 11.1 Application 11.2 Scope . 11.3 Reference Standards . 1Section II 22.0 Test Specimens 22.1 Samples Submitted for Test . 22.2 Samples Tested 22.3 Drawings 22.4 Rejection 2Section III . 33.0 Performance Requirements and Compliance Testing 33.1 Hydrostatic Test 3
19、3.2 Dielectric Test . 33.3 Deterioration at Manufacturers Extremes of Temperature and Pressure Ranges Test . 3Section IV 54.0 Detailed Requirements . 54.1 Materials . 54.2 Markings . 54.3 Installation Instructions . 5Section V . 55.0 Definitions . 5Appendix A - Typical Dielectric Unions 6viii Dielec
20、tric Pipe UnionsASSE 1079-2012Dielectric Pipe Unions 1ASSE 1079-2012Dielectric Pipe UnionsSection I1.0 General1.1 ApplicationDielectric Pipe Unions (herein referred to as the “device”) are used to join dissimilar pipe materials to prevent the flow of galvanic current or to isolate sections of pipe f
21、rom stray currents which could cause accelerated corrosion and premature failure of plumbing components and associated piping.1.2 Scope1.2.1 DescriptionThese devices are metallic and join metallic pipe in a similar manner to standard pipe unions and flanges, with the added ability to electrically in
22、sulate one pipe section from another.1.2.2 Size RangeIron and copper pipe sizes inch through 6 inches (10 mm to 150 mm).1.2.3 Adapter/Transition Fitting Connections1.2.3.1 Taper pipe threads, except dryseal, shall be in compliance with ASME B1.20.1 or ASTM F1498.1.2.3.2 Dryseal pipe threads shall be
23、 in compliance with ASME B1.20.3. 1.2.3.3 Cast copper alloy, wrought copper alloy and copper alloy solder joint connections shall comply with the dimensional requirements of ASME B16.18 or ASME B16.22.1.2.4 Pressure and TemperatureThe minimum pressure shall be 125.0 psi (861.8 kPa) at a minimum temp
24、erature of 180.0 F (82.2 C).1.3 Reference Standards ASME B16.18-2001 (R2012), Cast Copper Alloy Solder Joint Pressure Fittings ASME B16.22-2001 (R2010), Wrought Copper and Copper Alloy Solder-Joint Pressure Fittings ASME B1.20.1-1983 (R2006), Pipe Threads, General Purpose (Inch) ASME B1.20.3-1976 (R
25、2008), Dryseal Pipe Threads (Inch) ASTM F1498-08, Standard Specification for Taper Pipe Threads 60 for Thermoplastic Pipe and Fittings2 Dielectric Pipe UnionsASSE 1079-2012American Society of Mechanical Engineering (ASME) Three Park AvenueNew York, NY 10016http:/www.asme.orgASTM International (ASTM)
26、100 Barr Harbor DriveWest Conshohocken, PA 19428-2959 http:/www.astm.orgDielectric Pipe Unions 3ASSE 1079-2012Section II2.0 Test Specimens2.1 Samples Submitted for TestThree (3) devices of each size and model shall be submitted by the manufacturer. Tests shall be performed in the order listed on one
27、 (1) device of each size submitted.2.2 Samples TestedThe testing agency shall select one (1) of each size and model for the full test.2.3 DrawingsAssembly drawings and other data which are necessary to enable a testing agency to determine compliance with this standard, together with installation dra
28、wings, shall accompany devices when submitted for examination and performance testing under this standard.2.4 RejectionFailure of one (1) device shall result in a rejection of that size or model.4 Dielectric Pipe UnionsASSE 1079-2012Section III3.0 Performance Requirements and Compliance Testing3.1 H
29、ydrostatic Test3.1.1 PurposeThe purpose of this test is to determine if the device withstands a pressure of 250.0 psi (1723.7 kPa) or two (2) times the manufacturers maximum rated working pressure, whichever is greater.3.1.2 ProcedureThe device shall be pressurized to 250.0 psi (1723.7 kPa) or two (
30、2) times the manufacturers maximum rated working pressure, whichever is greater. The pressure shall be held for a minimum of five (5) minutes.3.1.3 CriteriaAny indication of external leakage shall result in the rejection of the device.3.2 Dielectric Test3.2.1 PurposeThe purpose of this test is to de
31、monstrate that the device contains electrical insulating properties between the inlet and outlet.3.2.2 ProcedureClean, by abrasion, an area on both the inlet and outlet of the device to the base material to ensure good electrical contact. With wires in contact with the cleaned areas at both the inle
32、t and outlet of the device, connect one wire to an electrical source and the other to a micro amp meter. Apply a 600 voltage AC and measure the micro amps. Apply a 2000 voltage DC and measure the micro amps.3.2.3 CriteriaA measured micro amp above 10 at the 600 volts AC or above 3 micro amps at the
33、2000 volts DC shall result in a rejection of the device.3.3 Deterioration at Manufacturers Extremes of Temperature andPressure Ranges Test3.3.1 PurposeThe purpose of this test is to verify that when exposed to water at the extremes of its temperature range and at its maximum rated pressure, none of
34、the materials shall be adversely affected.3.3.2 ProcedureWater at the manufacturers maximum rated working temperature and pressure shall be circulated through the device for eight (8) hours per day for ten (10) days. At the option of the testing laboratory, the test shall be permitted to be run cont
35、inuously for eighty (80) hours.Upon completion of the eighty (80) hours, immediately run cold water through the device. Once the device reaches 40.0 F (4.4 C), run water maintained at 40.0 F 1.0 F (4.4 C 0.6 C) through the device for one (1) hour.Dielectric Pipe Unions 5ASSE 1079-20123.3.3 CriteriaA
36、ny indication of external leakage shall result in a rejection of the device.6 Dielectric Pipe UnionsASSE 1079-2012Section IV4.0 Detailed Requirements4.1 Materials4.1.1 Solder and fluxes containing lead in excess of 0.2% shall not be used in contact with potable water.4.1.2 Metallic materials shall m
37、eet all of the material requirements of the applicable ASME standard.4.2 Markings4.2.1 Each device shall have the following information marked on it where it will be visible after the device has been installed:(a) Manufacturers name or trademark.(b) Pressure rating.4.2.2 The markings shall be either
38、 cast, etched, stamped or engraved on the body of the device, or on a brass or stainless steel plate securely attached to the device by a corrosion resistant means.4.3 Installation Instructions4.3.1 Complete installation instructions shall be packaged with the device.4.3.2 Devices with sweat ends or
39、 welded connections shall have specific instructions on how to prevent damage to the gasket during the soldering or welding process.Dielectric Pipe Unions 7ASSE 1079-2012Section V5.0 DefinitionsDefinitions in the standard shall take precedence over any other publication. Definitions not shown are fo
40、und in the Plumbing Dictionary, Sixth Edition, published by ASSE.8 Dielectric Pipe UnionsASSE 1079-2012Appendix A Typical Dielectric UnionsThis Appendix shall not be considered a part of the standard.American Society of Sanitary Engineering901 Canterbury Road, Suite A Westlake, Ohio 44145Phone (440) 835-3040 Fax (440) 835-3488E-Mail general.infoasse-plumbing.org Web: www.asse-plumbing.org
