1、ASSE Standard #1047-2011ASSE Board Approved: August 2011 ANSI Approved: August 2011 An American National StandardPerformance Requirements for Reduced Pressure Detector Fire Protection Backflow Prevention AssembliesASSE InternationalReduced Pressure Detector Fire Protection Backflow Prevention Assemb
2、lies iASSE 1047-2011General InformationNeither this standard, nor any portion thereof, may be reproduced without the written consent of ASSE International.Instructions for receiving authorization to display the ASSE Seal are available from ASSEs International Office. Organizations wishing to adopt o
3、r list any ASSE Standard 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.ASSE InternationalMokena, IllinoisCopyright 2011, 2009, 2005, 1999, 1993, 1990All rights reserved.ii Reduced Pressure Detector Fire Prote
4、ction Backflow Prevention AssembliesASSE 1047-2011Reduced Pressure Detector Fire Protection Backflow Prevention Assemblies iiiASSE 1047-2011ForewordThis foreword shall not be considered a part of the standard. However, it is offered to provide background information.ASSE Product Standards are develo
5、ped in the interest of consumer safety.The recognition of probable sources or causes of contamination of a potable water supply system and the application of essential devices, or means, to prevent the entrance of contaminants to the potable water system, causing it to become unfit for human consump
6、tion, is vital to the maintenance of its continued potability.This standard focuses on those devices, known as Reduced Pressure Detector Fire Protection Backflow Prevention Assemblies (RPDF), which will fulfill this protective need. This standard was retitled during the 1999 revision to add “fire pr
7、otection” to better describe the devices primary use.Typically installed but not limited to fire protection systems, the devices described are primarily designed for two functions. The protection of the public water supply from contaminants found in fire sprinkler systems is a primary function for a
8、 backflow preventer. These assemblies are also designed to detect low rates of flow up to 2.00 GPM (0.13 L/s) within the sprinkler system caused by leakage or unauthorized use. This standard also allows provisions for alarm signaling devices to be included in the assembly.Although many of the materi
9、al specifications are detailed within Section 4.1 of this standard, it is the responsibility of the manufacturer and 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
10、Committee of ASSE International.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 which conforms to these requirements.Complia
11、nce 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.iv Reduced Pressure Detector Fire Protection Backflow Prevention AssembliesASSE 1047-2011This standard was promulgate
12、d in accordance with procedures developed by the 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 Detector Fire Protection Backflow Prevention Assemblies vASSE 1047-2011Joseph FugeloProduct St
13、andards Committee ChairmanLabov Co.Philadelphia, PennsylvaniaRand AckroydRand Technical Consulting, LLCNewburyport, MassachusettsWilliam Briggs Jr.MGJ AssociatesNew York, New YorkMaribel CamposICC Evaluation ServicesWhittier, CaliforniaJudson CollinsJulyco ProfessionalsMannford, OklahomaRon GeorgePl
14、umb-Tech Design and(b) Reduced Pressure Detector Assembly Type II (RPDA-II).The RPDA and RPDA-II 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 hydraulicall
15、y operated 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
16、 located test cocks per Section 1.3.2.5. The assemblies also include a bypass line which provides a visual or audible indication of system leakage or unauthorized use of water.This standard also applies to Manifold Reduced Pressure Detector Assemblies consisting of two (2) or more complete RPDA or R
17、PDA-II assemblies in parallel. The assemblies do not need to be of the same pipe size. The manifold size shall be identified by the single inlet and outlet of the manifold RPDA or RPDA-II assembly. Manifold Reduced Pressure Principle Backflow Assemblies shall include line-sized shut-off valves on ea
18、ch inlet and outlet of the assemblies making up the manifold.1.2.2 Size RangeConnection pipe sizes shall be in accordance with Table 1.2 Reduced Pressure Detector Fire Protection Backflow Prevention AssembliesASSE 1047-2011Table 1Rated Water Flow and Maximum Allowable Pressure Loss for Various Sizes
19、Size of DeviceRated FlowRPDA and(b) 3.6, Allowable Pressure Loss at Rated Flow.If the orientation of either of the checks changes from the primary to an alternate orientation, the assembly shall also be tested to all of the following sections: (a) 3.5, Hydrostatic Backpressure Test of Checks;(b) 3.1
20、0, Drip Tightness of First Check;(c) 3.11, Drip Tightness of Second Check; and(d) 3.12, Drip Tightness of Bypass Check (For RPDA-II Assemblies).If the orientation of the relief valve changes from the primary to an alternate orientation, the assembly shall also be tested to all of the following secti
21、ons:(a) 3.8, Relief Valve Opening Test;(b) 3.9, Sensitivity of Differential Pressure Relief Valve Test;(c) 3.13, Relief Valve Discharge Test with Atmospheric Supply Pressure;(d) 3.14, Relief Valve Discharge with Positive Supply Pressure; and(e) 3.15, Backpressure/Backsiphonage Test.2.2 Samples Teste
22、dThe testing agency shall select one (1) of each type and model and size for the full test.2.3 DrawingsAssembly and installation drawings and any other data which are needed to enable a testing agency to determine compliance with this standard shall accompany assemblies when submitted for examinatio
23、n 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 per Sections 3.2, Hydrostatic Test of Complete Assembly, and 3.6, Allowable Pressure Loss at Rat
24、ed 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.Reduced Pressure Detector Fire Protection Backflow Prevention Assemblies 7ASSE 1047-2011Section I
25、II3.0 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 fouled discs or seats during any test.3.1 Independence of Components3.1.1 PurposeThe purpose of this test is to determine that the shut-o
26、ff 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 component with another component shall r
27、esult in a rejection of the assembly.3.2 Hydrostatic Test of Complete Assembly 3.2.1 PurposeThe purpose of this test is to determine if the assembly withstands pressures of two (2) times the manufacturers maximum rated pressure without leakage or damage to the assembly.3.2.2 ProcedureSeal the inlet
28、and the outlet of the assembly. The bypass line shall be open during this test. Pressurize the assembly through test cock #1 or #2 and hold a pressure of two (2) times the manufacturers maximum rated pressure for ten (10) minutes. The assemblys shut-off valves shall be in the full open position.3.2.
29、3 CriteriaAny external leaks shall result in a rejection of the assembly.3.3 Seat Leakage Test for Shut-off Valves3.3.1 PurposeThe purpose of this test is to determine the shut-off valves capability to withstand a test pressure of two (2) times the manufacturers maximum rated pressure in the closed
30、position without leakage.3.3.2 ProcedureNOTE: Non-integral shut-off valves shall be removed for this test.3.3.2.1 Procedure for the #1 Shut-off ValveWith the #1 shut-off valve in the closed position, slowly increase the pressure during a one (1) minute period on the inlet side from zero (0) psi to t
31、wice the manufacturers maximum rated pressure of the assembly. Hold the pressure for ten (10) minutes. Observe for leakage. Repeat the test pressurizing the outlet side from zero (0) psi to twice the manufacturers maximum rated pressure of the assembly.8 Reduced Pressure Detector Fire Protection Bac
32、kflow Prevention AssembliesASSE 1047-20113.3.2.2 Procedure for the #2 Shut-off ValveIf the sealing mechanism is different between the #1 shut-off valve and the #2 shut-off valve, repeat Section 3.3.2.1 with the #2 shut-off valve.3.3.3 CriteriaAny evidence of leakage during the test shall result in a
33、 rejection of the assembly.3.4 Hydrostatic Backpressure Test of Bypass Check (for RPDA-II Assemblies)3.4.1 PurposeThis test is for assemblies which incorporate a bypass check around the second check only. The purpose of this test is to determine if the check in the bypass line is capable of withstan
34、ding a backpressure of two (2) times the manufacturers maximum rated pressure without leakage or damage to the assembly.3.4.2 ProcedureWith the shut-offs on the bypass closed and test cock #1 open, pressurize the bypass check through test cock #2 to two (2) times the manufacturers maximum rated pres
35、sure. Hold for ten (10) minutes.3.4.3 CriteriaAny leakage or indications of damage which prevents full compliance with the remainder of this standard shall result in a rejection of the assembly.3.5 Hydrostatic Backpressure Test of Checks3.5.1 PurposeThe purpose of this test is to determine if the ch
36、ecks withstand pressures of two (2) times the manufacturers maximum rated pressure without leakage or damage to the assembly.3.5.2 ProcedureThe bypass line shall be closed for this test. Seal the outlet of the assembly. Pressurize the assembly through test cock #4 and hold a pressure of two (2) time
37、s the manufacturers maximum rated pressure for ten (10) minutes. Record if there is any leakage from the relief valve. Repeat the test pressuring through test cock #3 with test cock #2 open and the relief valve mechanically held closed or isolated from the assembly. Record if there is any leakage at
38、 the inlet or the #2 test cock.3.5.3 CriteriaAny leaks or indication of damage which prevents full compliance with the remainder of this standard shall result in a rejection of the assembly.3.6 Allowable Pressure Loss at Rated Flow3.6.1 PurposeThe purpose of this test is to determine the pressure lo
39、ss through the assembly at any flow from zero (0) GPM to the rated flow, and to determine if the pressure drop through the assembly generally increases from the initial flow to a flow of 50.00 GPM (3.15 L/s).3.6.2 ProcedureInstall the assembly per Figure 1 with a manometer or differential pressure g
40、auge at gauge connections #1 and #2. These shall connect to ring piezometers per ISA 75.02. The supply source shall be capable of supplying a volume of water adequate to meet the flow requirements of the Reduced Pressure Detector Fire Protection Backflow Prevention Assemblies 9ASSE 1047-2011size of
41、assembly on test and maintain an inlet pressure of at least 10.0 psi (68.9 kPa) greater than the allowable pressure loss at rated flow. The pressure loss through the piping between the shut-off valves of the assembly on test and the gauges at gauge connections #1 and #2 shall be subtracted from the
42、differential pressure reading at gauge connections #1 and #2. Purge the system of air. The pressure loss at flow shall be measured at increments of 5.00 GPM (0.32 L/s), starting at zero (0) flow up to 50.00 GPM (3.15 L/s). Gradually increase the flow of water through the assembly until the required
43、rated flow of water is achieved, per Table 1. Increase the flow to 150% of the rated flow shown in Table 1 and record the differential pressure. Increase the flow to 200% of the rated flow shown in Table 1 and hold for five (5) minutes; then record the differential pressure. Gradually decrease the f
44、low of water to zero (0).Figure 1Test SetupTest Valve #1 Flow Meter (Location Optional) Gauge Connection #1 Gauge Connection #2Test Valve #3 Flow Meter Test Valve #4Test Valve #2NOTES:1. Gauge connections #1 the inlet and the outlet of the manifold shall identify its size. During the flow test, whil
45、e still at 200% of flow, alternately close and open the shut-off valves of each of the assemblies in the manifold, causing the flow to pass through each assembly in the manifold individually for five (5) minutes.Install the assembly per Figure 1 with a manometer or differential pressure gauge at gau
46、ge connections #1 and #2. These shall connect to ring piezometers per ISA 75.02. The supply source shall be capable of supplying a volume of water adequate to meet the flow requirements of the size of assembly on test and maintain an inlet pressure of at least 10.0 psi (68.9 kPa) greater than the al
47、lowable pressure loss at rated flow. The pressure loss through the piping between the shut-off valves of the assembly on test and the gauges at gauge connections #1 and #2 shall be subtracted from the differential pressure reading at gauge connections #1 and #2. Purge the system of air. The pressure
48、 loss at flow shall be measured at increments of 5.00 GPM (0.32 L/s), starting at zero (0) flow up to 50.00 GPM (3.15 L/s). Gradually increase the flow of water through the assembly until the required rated flow of water is achieved, per Table 1. Increase the flow to 150% of the rated flow shown in
49、Table 1 and record the differential pressure. Increase the flow to 200% of the rated flow shown in Table 1 and hold for five (5) minutes; then record the differential pressure. Gradually decrease the flow of water to zero (0).Reduced Pressure Detector Fire Protection Backflow Prevention Assemblies 11ASSE 1047-20113.6.4 Criteria(a) The occurrence of pressure loss greater than those shown in Table 1 at flows from zero (0) GPM to rated flow (both ascending and descending) shall result in a rejection of the assembly.(b) Any relief valve discharge during the flow test shall result i
