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1、ASSE Standard #1052-2$904 ASSE Board Approved: FEBRUARY? 2004 Neither this standard, nor any portion thereof, may be reproduced without the written consent of the American Society of Sanitary Engineering. No product may besaid to beASSE approved unlessthe manufacturer has applied tothe ASSE has had
2、his product tested according to the applicable ASSE Standards, and when the product has passed the test, displays the ASSE Seal on the product, Instructions for receiving the authorization to display the Seal are available from ASSES ASSE Standard numberon the cover page first and in equal or larger
3、typetothatoftheadopting International office. organizations wishing to adopt or list any ASSE Standard should print the or listing organization. American Society of Sanitary Engineering Westlake, Ohio Copyright o 2004, 1993 All rights reserved. Hose Connection BackB/ow Preipenters ASSE #I052 - 2004
4、-,-,- Hose Connection Backflow Prevenfers ASSE #-?O52 - 2004 -,-,- This foreword shall not be considered a part of 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 for
5、 Plumbing and Sanitary Research is dedicated to the preservation of public health and safety through its guiding principle “Prevention Rather Than Curei”. The ASSES Standards Program systematically evaluates new technologies through a formal request, and addresses the development and promulgation of
6、 performance standards de- signed to safeguard public health and safety, Standards for the performance of components of systems of plumbing are considered by the health and safety. American Society of Sanitary Engineering for Plumbing and Sanitary Research to be of great value in the development of
7、improved plumbing systems for the increased protection of public To accomplish this, the ASSE, through its Product Standards Committee. encourages manufacturers to develop performance standards and testing procedures for their products. interests in plumbing systems, and are acceptable to this Socie
8、ty. These standards have the consensus of the manufacturers and others who have pertinent Preventing the contamination of potable water in plumbing systems is a major objective ofthe ASSES Standards Program. The ASSE addressed the need for backflow protection at hose threaded outlets, where attachin
9、g a common garden hose or utility hose may expose users to highly dangerous conditions. Hose threaded protective devices shall only be used on systems where the low-head backpressure does not exceed that generated by an elevated hose equal to or less than I O feet (3.0 m) in height. The ASSE issued
10、Standard I QI I for Hose Bibb Vacuum Breakers, which provides excellent backsiphonage protection, using devices containing a single check valve and an atmospheric vent valve. This standard focuses on devices containing two check valves which are known as Hose Connection Backflow Preventers. Backsiph
11、onage and backpressure protection are achieved by adding the safety factor of a second check valve to the protection already provided by the single check Hose Bibb Vacuum Breaker. The two check device: * e meets the ASSE definition of a backflow prevention device; provides improved protection agains
12、t the high hazard conditions of backsiphonage and low-head backpressure; and e allows a field test to be pedormed. Hose Connection BackB/ow Preipenters ASSE #I052 - 2004 -,-,- It is essential that regular inspection and maintenance of backflow prevention devices be conducted in order to assure that
13、the devices are continuously in working condition to prevent bac kf l ow. Although many of the material specifications are detailed within Section lV of this Standards, it is the responsibility ofthe manufacturer to comply with the requirements of the Safe Drinking water Act, United States Public La
14、w 93-523. The working group which developed this standard revision, was set up within the framework of the Product 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
15、 who also participated in the meetings for this standard. This standard does not imply ASSES endorsement of a product which conforms to these req u i re me n ts I Compliance with this standard does not imply acceptance by any code body. Plumbing codes mandate how and where these devices are installe
16、d. 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. It is recommended that these devices be installed consistent with local codes by qualified and trained p
17、rofessionals. This standard was promulgated in accordance with procedures developed by the American National Standards Institute (ANSI), This edition ofthe standard was approved by the ASSE Board of Directors on month day, year, as an ASSE standard, iv Hose Csnreciioon Bslekfisw Preventers ASSE #103
18、2 - 2004 Richard J, PraspaI Producf Standards Commitfee Chairman Prosgal Consulting Services inc. Brunswick, Ohio State of Wisconsin Depafiment of Commerce Madison, Wisconsin Gunnar o. cabsliiins Collins Backflow Speciaisfs. hc. Paiatine, Minois Jud CoIlins Oklahoma Sfate Health Depadmenf Okiahoma C
19、ity, Oklahoma ASSE Standards Coordinator Westiake, Ohio ichard eoga General fn ferest Buffaio Grove, Minois Steven H azzard ASSE Sfaffngineer Westlake, Ohio Dak SGS United States Testing Company Tulsa, Oklahoma ichaeI Kabel fnterna fional Association of Plumbing and Mechanical fficiak Walnnuf? Calif
20、ornia lIenigae Lehr, P.E. Lehr Associates New York, New York United Association of Plumbers and Pigefifteers Washington, D. C. Perry eikie, Jr. Perry W- Meikie Consulting Engineer Antioch, Caiifornia awaI p i g a d iiwa Ia Kohler Company Kohlerf Wisconsin Lgan i g a i c internationai Code Council, i
21、n. country Chb Hik, Mnois Jack ViIendre Precision Plumbing Products, inc. Pof$md, Oregon David VislIa Plumbing Manufacturers lnstitufe Scha umberg, Iiiinois Jaseph c. aut P.E. ASSE Staff Engineer Westjake, Ohio Hose Connection Backflow Prevenfers v ASSE #I052 - 2004 -,-,- Rand H“ y Rand Engine erin
22、y Mewburyport, Massachusetfs Woodford Manufacturing Co. Co/orado Springs, Coiorado Jay R. Smith Manufacturing Co. Montgomery, Alabama John do Conbraco Industries, inc. Itgaffhews. North CsroIina Herb r Hoeptner Perfected Products Gilroy, Caiifornia Zurn industries. inc. Erie, Pennsylvania Wikins. Di
23、vision of Zum Indusfuies Paso Robles, Calfamia Trevor Perera CSA infernafional Cjeveiand, Ohio andy Ames Fluid Control Systems Woodiane , Caiifornia Jim en Wisconsin Depaftinent of Commerce Friendship, Wisconsin vi Hose Conrection Backflow Preventers ASSE #?O32 - 2004 -,-,- Secfi5n I I.I.I.I.I.II.I.
24、I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I. 1 1.0 General 1.3 Reference Standards 4 Section It I.I.I.I.I.II.I.I.I.I.II.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I. 2 2.0 Test Specimens 2 2.1 Samples Submit . 2 2.2 Drawings 2 2.3 Rejec
25、tlQn 2 Secfi5n III I.I.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I. 3 3.0 3.4 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.1 1 3.42 3.13 3.44 Performance Requirements and Compliance Testing Hydrostatic Test of Complete Device Figure 1 3 Water FI 3 Table 1
26、3 Figure 2 4 Deterioration at Maximum Rated Temperature and Pressure 4 Life Cycle Test 4 Resistance to Bending Figure 3 Tightness of Outlet Check Valve Figure 4 6 Tightness of Inlet Check Valve 6 Leakage from Vent Ports 6 Backflow Through Inlet Check Valve Backflow Through Outlet Check Valve Figure
27、7 9 . 10 Non-removable Feature 11 Secfi5n IV I.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I. 12 4.0 Detailed Requirements 4.4 Materials 4.2 Instructions for Markings 4.3 li?StalIati5n Ii-tstrUCti5ns . 12 4.4 Repair Instructions 12 Section V . -I 3 5.0
28、 Definitions . 13 . . Hose Connecfion BaMow Prevenfers ASSE #I052 - 2004 vii -,-,- vii Hose Csnrecioon f36lekfsw Preventers ASSE # 1032 - 2004 -,-,- This standard establishes design requirements, basic performance requirements and test procedures for hose connection backfl5 preventers (herein referr
29、ed to as the “device“). This device isdesigned to beinstalledonthedischargesideofa hosethreaded outletona potablewater system. This two-check device protects against backflow. due to backsiphonage or loiv-head backpressure, and is field testable to certify protection under the high hazard conditions
30、 present at a hose threaded outlet. This device shall only be used on systems where the Io?ni-head backpressure does not exceed that generated by an elevated hose equal to or less than 48 feet (3,O m) in height. These devices shall not be subjected to continuous water pressure. 1.21 Description A ho
31、se connection backflow preventer shall consist of two independent checks, force loaded or biased to a closed position, with an atmosphericvent located between thehvo checkvalves, which is force loaded or biased to an open position. and a means for attaching a hose. 1.2.2 size Range The device shall
32、have male hosethreaded outlets sized 112 NPHS, 314 NPHS or 1 NPHS. Hose threadsshall conformtoStandard ANSIIASME BI .20,5. lnletswith hosethreads shall be provided with a non-removable feature. 1 2.3 Pressure Wange The devices shall operate at pressures from O psi (O kPa) to 125.0 psi (861.9 kPaj. 1
33、.2.4 Temperature Range The devices shall operate at temperatures from 33.0 “F (0.6 “C) to 140.0 “F (6O.O “Cj. 1-27 W e a i r t Devices shall be repairable. Reference to industry standards shall be the latest edition of these standards. -,-,- Three (3) devices of each size and model shall be submitte
34、d by the manufacturer. Tests shall be performed in the order listed on one (i j device of each size submitted. The testing agency shall select one (i j of each size and model for the full test. Assembly drawings and other data which is necessary to enable a testing agency to determine compliance wit
35、h this standard, togetherwith installation drawings, shall accompany devices when submitted for examination and performance tests under this standard. Failure of one (i j device shall be cause for rejection sf that size and model until the manufacturer has corrected the fault and submitted new devic
36、es for testing. 2 Hose Csnreciion Bslekfisw Reventers ASSE # 1032 - 2004 -,-,- 3.1 .i Purpose The purpose ofthis test is to determine iffhe device withstands a pressure of250.0 psi (1723.8 kPa) ortwo (2) times the manufacturers maximum rated working pressure, whichever is greater. 3.1 2 Procedure Th
37、e device shall be installed in the open position on the fest system as shown in Figure 1 with the inlet wnnected to an ambient water supply and the throttling valve #2 open. The device shall be purged ofair, andthethrottlingvaIve#2 closed. Thedeviceshall be pressuriedto250 psi (1723.8 kPa) ortwo (2)
38、 times the manufacturers maximum rated working pressure, whichever is greater, The pressure shall be held for not less than five (5j minutes. Figure 1 Primary Supply Gauge Device on Tes; Valva iil Rirrg inlst outlet Iiezometer 3.1.3 Criteria Any indication of external leakage shall result in the rej
39、ection of the device. 3.2.1 Purpose The prpose of this test is to determine the pressure losses at various flow rates Table 1 Flow Rate and Pressure Loss inlet Size Minimum Flow Rate Maxim um Ai l owa b Ie Il of 5evice Pressure Loss 3 3.2.2 Procedure The device shall be installed as shown in Figure
40、2 in a test system equipped with means for accurately measuring the flow rate and pressure loss across the device. After purging the system of air, close the throttling valve #2. The throttling valve #2 shall then be opened slovly until the 25.0 psi (132.4 kPa) pressure differential is reached. Gaug
41、e tfl - Differential Gauge lnle? u.iet Connections shall be ring piezometers per 3.23 Criteria Failure to meet the flow requirements in Table 1 shall result n a rejection ofthe device. 3 . 3 . 1 Purpose The purpose ofthis test is to determine if the device continues to function without leakage when
42、exposed to the maximum rated temperature and pressure. 3.3.2 Procedure Install the device per Figure 2. Water at a temperature of 140.0 “F k 5.0 “F ( 60.0 “(9 k 3.0 “(9) or the manufacturers maximum rated temperature, whichever is greater, and at a pressure of 125.0 psi (861.9 kPa) or the manufactur
43、ers maximum rated pressure. whichever is greater %haII be circulated at a flow rate per Table 4 through the device for eight (8) hours per day for a total often (10) days. 3.3.3 Criteria Any indication of external leakage shall result in a rejection of the device. 3.4.1 Purpose of five thousand (500
44、0) cycles. The purposeofthis test isto determine ifthere is any deterioration ofpeiformance upon completion 4 Hose Csnreciion Bslekfisw Reventers ASSE # 1032 - 2004 -,-,- 3.4.2 Procedure Install the device as shown in Figure 1 with ambient water at the manufacturers maximum rated working pressure ap
45、plied to the inlet. The device shall be cycled using a solenoid valve upstream of the device, and the outlet open to the atmosphere. The device shall be subjected for five thousand (5000j cycles. Cycling of the solenoid valve shall i-tot exceed thirty (30) cycles per minute. 3.4.3 criteria Deteriora
46、tion of performance which prevents compliance with the remaining sectioi-ts of this standard shall result in a rejection of the device 35.1 Purpose The purpose of this test is to determine if the device continues to function without leakage when subjected to a pull of 400.0 pound (45.4 kg) on a hose
47、 perpendicular to the device. 3-5.2 Pracedure Withthedeviceinstalled asshown in Figure3applya load equivalenttoa pullof100.0pound (454 kgj in a direction at rightanglestothe axisthrough the hose connections aftheoutlet ofthedevice and hold for not less than three (3) minutes, During the test, the device shall be pressurized to not less than -325.0 psi (864 .9 kPa). Figure 3 LorUirq Be2171 3.0 inches 3.0 ifiches 3.0 inches .1 mm) (75.2 inmj (76.2 mmj 5C.O Ibs, 33.0 ibs. 25 C l
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