1、Reduced Pressure Principle Backflow Preventers and 1Reduced Pressure Principle Fire Protection Backflow Preventers ASSE 1013-2011Performance Requirements forReduced Pressure Principle Backflow Preventers and Reduced Pressure Principle Fire Protection Backflow PreventersAmerican Society of Sanitary E
2、ngineeringASSE Standard #1013-2011ASSE Board Approved: August, 2011ANSI Approved: August, 2011An American National StandardReduced Pressure Principle Backflow Preventers and iReduced Pressure Principle Fire Protection Backflow Preventers ASSE 1013-2011General InformationNeither this standard, nor an
3、y portion thereof, may be reproduced without the written consent of the American Society of Sanitary Engineering.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
4、ASSE Standard number on the cover page first and in equal or larger type to that of the adopting or listing organization.American Society of Sanitary EngineeringWestlake, OhioCopyright 2011, 2009, 2005, 1999, 1993, 1988, 1971All rights reserved.ii Reduced Pressure Principle Backflow Preventers andRe
5、duced Pressure Principle Fire Protection Backflow PreventersASSE 1013-2011Reduced Pressure Principle Backflow Preventers and iiiReduced Pressure Principle Fire Protection Backflow Preventers ASSE 1013-2011ForewordThis foreword shall not be considered a part of the standard. However, it is offered to
6、 provide background information.ASSE Product Standards are developed in the interest of consumer safety.In potable water supply systems, there are many varied conditions which can develop and cause a reversal of the normal direction of flow (backflow) in the water supply lines. By this reversal of d
7、irection of flow, water from unintended sources can enter and contaminate the potable water in the supply lines and potable water source.There are two basic types of backflow, identified by the two conditions that cause it:(1) Backpressure backflow is a reversal of the normal direction of flow in th
8、e pipe line due to a condition which causes the pressure in the system being supplied to become greater than that in the supply line; the system pressure being always above atmospheric.(2) Backsiphonage backflow is a reversal of the normal direction of flow in the pipe line due to a negative pressur
9、e (vacuum) being created in the supply line with the backflow source subject to atmospheric pressure.The type of occupancy of the premises, the design and construction of the system, and the manner in which it is used are major influences on the possible incidence of backflow. Consequently, the degr
10、ee of the hazard to which persons may be exposed varies from discomfort and minor illness, to fatal, if the backflow of contaminants into the potable water system is not completely prevented.Due to the many variables in systems, devices of different performance characteristics are needed; each tailo
11、red to the system and its protection needs. This standard covers two (2) types of devices, which are identified as Reduced Pressure Principle Backflow Preventers (RP) and Reduced Pressure Principle Fire Protection Backflow Preventers (RPF). The RP and the RPF are identical in their backflow protecti
12、on. The RPF, which was added to this standard in 1999, has specific performance requirements relating to its use on fire protection systems.This standard is a composite of the most practical and effective behavioral characteristics for devices of this type, drawn on the experience of engineers, manu
13、facturers, public health officials and others who are knowledgeable in this field and who have the responsibility of protecting our potable water supplies.Although many of the material specifications are detailed within Section 4.1 of this standard, it is the responsibility of the manufacturer and t
14、he installer to comply with the relevant jurisdictional requirements.iv Reduced Pressure Principle Backflow Preventers andReduced Pressure Principle Fire Protection Backflow PreventersASSE 1013-2011The working group, which developed this standard revision, was set up within the framework of the Prod
15、uct Standards Committee of the American Society of Sanitary Engineering.Recognition is made of the time volunteered by members of this working group and of the support of the manufacturers who participated in meetings for this standard.This standard does not imply ASSEs endorsement of a product whic
16、h conforms to these requirements.Compliance with this standard does not imply acceptance by any code body.It is recommended that these devices be installed consistent with local codes by qualified and trained professionals.This standard was promulgated in accordance with procedures developed by the
17、American National Standards Institute (ANSI).This edition was approved by the ASSE Board of Directors on August 9, 2011 as an ASSE standard.Reduced Pressure Principle Backflow Preventers and vReduced Pressure Principle Fire Protection Backflow Preventers ASSE 1013-2011Joseph FugeloProduct Standards
18、Committee ChairmanLabov Co.Philadelphia, PennsylvaniaRand AckroydRand Technical Consulting, LLCNewburyport, MassachusettsWilliam Briggs Jr.MGJ AssociatesNew York, New YorkMaribel CamposICC Evaluation ServicesWhittier, CaliforniaJudson CollinsJulyco ProfessionalsMannford, OklahomaRon GeorgePlumb-Tech
19、 Design and(b) Reduced Pressure Principle Fire Protection Backflow Preventers (RPF). These assemblies consist of two (2) independently-acting check valves, internally force loaded to a normally closed position and separated by an intermediate chamber (or zone) in which there is a hydraulically opera
20、ted relief means for venting to atmosphere, internally force loaded to a normally open position. These assemblies are designed to operate under continuous pressure conditions. The assembly shall include two (2) properly located, tightly closing shut-off valves, per Section 1.3.2.7, and properly loca
21、ted test cocks, per Section 1.3.2.5.This standard also applies to Manifold Reduced Pressure Principle Backflow Assemblies consisting of two (2) or more complete Reduced Pressure Principle Backflow Preventers in parallel. The assemblies do not need to be of the same pipe size. The manifold size shall
22、 be identified by the single inlet and outlet of the Manifold Reduced Pressure Principal Backflow Assembly. Manifold Reduced Pressure Principle Backflow Assemblies shall include line-sized shut-off valves on each inlet and outlet of the assemblies making up the manifold.1.2.2 Size RangeConnection pi
23、pe sizes shall be in accordance with Table 1.2 Reduced Pressure Principle Backflow Preventers andReduced Pressure Principle Fire Protection Backflow PreventersASSE 1013-2011Table 1Rated Water Flow and Maximum Allowable Pressure Loss for Various SizesSize of DeviceRated FlowRP MaximumAllowable Pressu
24、reLoss at Rated FlowRPF MaximumAllowable PressureLoss at Rated FlowNPSDNGPML/spsikPapsikPainchmm 1 1 1 2 2 3 4 6 8 10 12 14 16 8 10 15 18 20 25 32 40 50 65 80 100 150 200 250 300 350 400 1.00 3.00 7.50 20.00 30.00 50.00 75.00 100.00 160.00 225.00 320.00 500.00 1000.00 1600.00 2300.00 3000.00 3700.00
25、 4400.00 0.06 0.19 0.47 1.26 1.89 3.15 4.73 6.31 10.09 14.20 20.19 31.55 63.09 100.94 145.11 189.27 233.43 277.60 24.0 22.0 22.0 20.0 20.0 18.0 18.0 16.0 16.0 16.0 15.0 14.0 14.0 14.0 14.0 13.0 13.0 13.0 165.5 151.7 151.7 137.9 137.9 124.1 124.1 110.3 110.3 110.3 103.4 96.5 96.5 96.5 96.5 89.6 89.6
26、89.6 - - - - 20.0 18.0 18.0 14.0 14.0 14.0 13.0 12.0 12.0 12.0 12.0 11.0 11.0 11.0 - - - - 137.9 124.1 124.1 96.5 96.5 96.5 89.6 82.7 82.7 82.7 82.7 75.8 75.8 75.8 1.2.3 Pressure Range1.2.3.1 An RP assembly shall be designed for a working pressure of at least 150.0 psi (1034.2 kPa).1.2.3.2 An RPF as
27、sembly shall be designed for a working pressure of at least 175.0 psi (1206.6 kPa).Reduced Pressure Principle Backflow Preventers and 3Reduced Pressure Principle Fire Protection Backflow Preventers ASSE 1013-20111.2.4 Temperature RangeThe assemblies shall be designed for a minimum temperature range
28、of 33.0F to 140.0F (0.6C to 60.0C).1.3 Limitations on Design1.3.1 Structural StrengthAll parts of the assembly shall be designed to withstand, without permanent distortion, the stresses developed by the hydrostatic test pressure, as well as the stresses resulting from a specified water working press
29、ure coincident with operation under a specified unbalanced pressure condition.1.3.2 Mechanical Function1.3.2.1 Relief Valve Connections(a) The relief valve discharge port shall be of a size that cannot be threaded for iron pipe size or connected with tubing, either internally or externally.(b) Conne
30、ction of an external relief valve to the main valve body shall not be a standard ANSI pipe thread.1.3.2.2 Female Pipe Threaded ConnectionsFemale pipe threaded connections shall be tapped into bosses in the body and shall be so constructed that it will not be possible to run a pipe into them far enou
31、gh to restrict the flow through the assembly or interfere with working parts.1.3.2.3 Repairability(a) The internal parts of the assembly shall be accessible for inspection, repairs or replace-ments. The design shall permit this servicing without removing the assembly from the line by using the shut-
32、off valves to isolate the assembly.(b) All replacement parts of the assemblies of the same size and model shall be interchange-able with the original parts.(c) Seats shall be replaceable.1.3.2.4 Delivery InstructionsAll assemblies shall be delivered for installation with the shut-off valves attached
33、. 1.3.2.5 Test Cock LocationTest cocks shall be provided in the following locations:(a) On the supply side of the inlet shut-off valve (not required on any sizes of type RPF assemblies).(b) Between the inlet shut-off valve and the first check. (c) Between the checks. (d) Between the second check and
34、 the outlet shut-off valve.1.3.2.6 Test Cock Size Inlet and Outlet ConnectionFor assemblies up to and including 1 inch (25 mm) pipe size, a minimum inlet and outlet thread on the test cocks shall be NPT or SAE J513 . For assemblies 1 inch 2 inch (32 mm 50 mm), a minimum inlet and outlet thread on th
35、e test cocks shall be NPT. For assemblies 2 inch 4 inch (65 mm 100 mm), a minimum inlet and outlet thread on the test cocks shall be NPT. For assemblies 6 inch (150 mm) and larger, a minimum inlet and outlet thread on the test cocks shall be NPT. Test cock waterways shall be full port. Protective ca
36、ps shall be provided on SAE test cocks to protect male outlet threads.4 Reduced Pressure Principle Backflow Preventers andReduced Pressure Principle Fire Protection Backflow PreventersASSE 1013-20111.3.2.7 Shut-off Valves(a) Shut-off valves shall be provided at the inlet and outlet of the assembly.(
37、b) Shut-off valves shall be resilient seated.(c) For type RPF assemblies, the shut-off valves shall be UL or FM listed or approved for use in fire protection systems.(d) The #1 shut-off is located at the inlet side of the assembly.(e) The #2 shut-off is located at the outlet side of the assembly.1.3
38、.2.8 Air Gap DevicesWhen an air gap device is supplied as part of the assembly for the relief valve vent, it shall comply with ASME A112.1.3 and shall be in place during all testing.1.4 Reference Standards ASME A112.1.3-2000 (R2010), Air Gap Fittings for Use with Plumbing Fixtures, Appliances and Ap
39、purtenances ASME B16.24-2006, Cast Copper Alloy Pipe Flanges and Flanged Fittings: Classes 150, 300, 400, 600, 900, 1500 and 2500 ASME B1.20.1-1983 (R2006), Pipe Threads, General Purpose (Inch) ASME B1.20.3-1976 (R2008), Dryseal Pipe Threads (Inch) ASME MFC-14M-2003 (R2008), Measurement of Fluid Flo
40、w Using Small Bore Precision Orifice Meters ASSE Standard #1060-2006, Performance Requirements for Outdoor Enclosures for Fluid Conveying Components ASSE Standard Series 5000-2009, Cross Connection Control Professional Qualification Standard ASTM A 126-04 (2009), Standard Specification for Gray Iron
41、 Castings for Valves, Flanges, and Pipe Fittings ASTM A 536-84 (2009), Standard Specification for Ductile Iron Castings AWWA C606-06, Grooved and Shouldered Joints CFR Title 21, Section 177, Food and Drugs: Indirect Food Additives: Polymers ISA 75.02.01-2008, Control Valve Capacity Test Procedures S
42、AE J513-1999, Refrigeration Tube Fittings General Specifications University of Southern California Foundation for Cross Connection Control and(b) 3.5, Allowable Pressure Loss at Rated Flow.If the orientation of either of the checks changes from the primary to an alternate orientation, the assembly s
43、hall also be tested to all of the following sections:(a) 3.4, Hydrostatic Backpressure Test of Checks;(b) 3.8, Drip Tightness of First Check; and(c) 3.9, Drip Tightness of Second Check.If the orientation of the relief valve changes from the primary to an alternate orientation, the assembly shall als
44、o be tested to all of the following sections:(a) 3.6, Relief Valve Opening Test;(b) 3.7, Sensitivity of Differential Pressure Relief Valve Test;(c) 3.10, Relief Valve Discharge Test with Atmospheric Supply Pressure;(d) 3.11, Relief Valve Discharge with Positive Supply Pressure;(e) 3.12, Backpressure
45、/Backsiphonage Test; and(f) 3.13, Relief Valve vs. Supply Fluctuation Test for Type RPF Assemblies.2.2 Samples TestedThe testing agency shall select one (1) of each type and model and size for the full test.2.3 DrawingsAssembly drawings and other data which are needed to enable a testing agency to d
46、etermine compliance with this standard shall accompany assemblies when submitted for examination and performance testing under this standard.2.4 RejectionFailure of one (1) assembly shall result in a rejection of that type and model and size.2.5 Manifold AssemblyA manifold assembly shall be tested p
47、er Sections 3.2, Hydrostatic Test of Complete Assembly, and 3.5, Allowable Pressure Loss at Rated Flow. The individual assemblies that make up the manifold shall meet all of the test sections of the standard in their intended orientation based on the nominal pipe size for each individual assembly.Re
48、duced Pressure Principle Backflow Preventers and 7Reduced Pressure Principle Fire Protection Backflow Preventers ASSE 1013-2011Section III3.0 Performance Requirements and Compliance TestingNOTE: A failure due to dirt or debris is not cause for rejection. It is permissible to clean, but not replace f
49、ouled discs or seats during any test.3.1 Independence of Components3.1.1 PurposeThe purpose of this test is to determine that the shut-off valves, checks and relief valves operate without interfering with each other.3.1.2 ProcedureVerify that the shut-off valves, checks and relief valves do not interfere with one another through their full range of travel.3.1.3 CriteriaAny interference of one (1) component with another component shall result in a rejection of the assembly.3.2 Hydrostatic Test of Complete Assembly 3.2.1 Purpo
