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1、ASSE Standard 16 I O57 Issued: February, 2001 Performance Requirements for Freeze Resistant Sanitary Yard Hydrants w ith Backflow Protection Errata Sheet Issued: April 15,2085 1.2.2.4 Operating Pressure Range kPaf. and a minimum operating pressureof at most20.0 psi (137.9 kPaj as a minimum range. Th
2、e 3-6.1 Purpose The purpose of this test is to determine if lhzgjs leakage #=wmg-h frons the atmospheric vent. 3-62 Procedure be opened. the supply valve shall be opened to provide 20.0 psi (1 37.9 kPaf or the manufacturers 3-63 Criteria Any leakage at the vent ports from 20.0 psi (1 37.9 kPaj or th
3、e manufacturers stated minimum Copyright American Society of Sanitary Engineering Provided by IHS under license with ASSE Licensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/05/2007 02:09:24 MSTNo reproduction or networking permitted without license from IHS -,-,- Errata Shee
4、t Issued. June “I, ZQQ4 Instructions shall accompany each device and shall provide all information, including illustrations necessary for correct installation, operation, maintenance, and repair ofthe device. 5 Instructions shall advise the user ofthe flushin9 time required before drawin9 water to b
5、e used for drinking. . . . Copyright American Society of Sanitary Engineering Provided by IHS under license with ASSE Licensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/05/2007 02:09:24 MSTNo reproduction or networking permitted without license from IHS -,-,- Copyright Ameri
6、can Society of Sanitary Engineering Provided by IHS under license with ASSE Licensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/05/2007 02:09:24 MSTNo reproduction or networking permitted without license from IHS -,-,- Errata Sheet Issued: June 12,2001 Change Section 9 2.8 to
7、 read: i “2.8 Installation and sewice Hydrants shall be designed and built such that, after installatioi-t, elastomeric parts shall be accomplished ithout the need to ecdat. , repair OF replacement ofthe Copyright American Society of Sanitary Engineering Provided by IHS under license with ASSE Licen
8、see=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/05/2007 02:09:24 MSTNo reproduction or networking permitted without license from IHS -,-,- ASSE Standard #lo57 Issued: February, 2001 Amercan Society of Sunitu y Engineerng Performance Requirements for Freeze Resistant Sanitary Y
9、ard Hydrants with Backflow Protection Copyright American Society of Sanitary Engineering Provided by IHS under license with ASSE Licensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/05/2007 02:09:24 MSTNo reproduction or networking permitted without license from IHS -,-,- Gene
10、ral Information Neither 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 approved unless the manufacturer has applied to the ASSE has had his product tested according to the applic
11、able 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 ASSE Central Office. Organizations wishing to adopt or list any ASSE Standard should print the ASSE Standard Numbe
12、r on the cover page first and in equal or larger type to that of the adopting or listing organization. American Society of Sanitary Engineering Westlake, Ohio Copyright O 2001, 1993 All rights reserved. Freeze Resistant Sanitary Yard Hydrants with Backnow Protection ASSE #lo57 Issued: 2001 i Copyrig
13、ht American Society of Sanitary Engineering Provided by IHS under license with ASSE Licensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/05/2007 02:09:24 MSTNo reproduction or networking permitted without license from IHS -,-,- _ II Freeze Resistant Sanitary Yard Hydrants with
14、 Backtow Protection ASSE #?O57 Issued: 2001 Copyright American Society of Sanitary Engineering Provided by IHS under license with ASSE Licensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/05/2007 02:09:24 MSTNo reproduction or networking permitted without license from IHS -,-,
15、- Foreword This foreword is not considered a part of the standard. However, it is offered to provide back- ground information. It is currently recognized that the common garden or utility hose, when connected to a potable water supply by means of hose threaded outlet, constitutes a potential cross c
16、onnection. It is also currently recognized that the same cross connection may exist when a potable water supply is permitted to drain underground. With specific reference to Freeze Resistant Sanitary Yard Hydrants, this standard has been developed to protect the potable water supply from backflow co
17、ntamination and ground water contamination. It has been recognized that five types of yard hydrants need to be considered to protect against freezing. The types considered are: Type 1 which provides protection with two check valves and an atmospheric vent and does not require removal of the hose to
18、provide freeze protection; Type 2 which provides protection with two check valves and an atmospheric vent and requires removal of the hose to provide freeze protection; Type 3 which provides protec- tion with one check valve and an atmospheric vent and does not require removal of the hose to provide
19、 freeze protection; Type 4 which provides protection with one check valve and an atmospheric vent and requires removal of the hose to provide freeze protection; Type 5 which has an air gap or removable backflow protection device and requires removal of the backflow protection device and hose to prov
20、ide freeze protection;. 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. These devices shall be installed, consistent with local codes, by qualified and trained profes- sionals.
21、 This standard was promulgated in accordance with procedures developed by the American National Standards Institute (ANSI). Freeze Resistant Sanitaty Yard Hydrants with Backflow Protection ASSE #lo57 Issued: 2001 Copyright American Society of Sanitary Engineering Provided by IHS under license with A
22、SSE Licensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/05/2007 02:09:24 MSTNo reproduction or networking permitted without license from IHS -,-,- iV Freeze Resistant Sanitary Yard Hydrants with Backflow Protection ASSE MO57 Issued: 2001 Copyright American Society of Sanitary
23、 Engineering Provided by IHS under license with ASSE Licensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/05/2007 02:09:24 MSTNo reproduction or networking permitted without license from IHS -,-,- O 2000-01 Product Standards Committee Richard J. Prospal Standards Committee Cha
24、irman Reliance Mechanical Cleveland, Ohio Rand H. Ackroyd Rand Engineering Newburyport, Massachusetts Lynne Arie Building Officials and Code Administrators, Inc. Country Club Hills, Illinois Michael Beckwith State of Wisconsin DILHR Madison, Wisconsin Charles Caruana / Edwin Ho Canadian Standards As
25、sociation Etobicoke, Ontario, Canada O Gerald Phariss United Association of Plumbers and Pipefitters Washington, D. C. Shannon M. Corcoran ASSE Standards Coordinator Westlake, Ohio A. Richard Emmerson Chicago Faucet Company Des Plaines, Illinois Patrick J. Higgins P. J. Higgins 3m;i-I Gauge device,
26、23kg 15kq 11 kq (50lb) (33 ib) (25 li) 45 kg (1 O0 Ib) Lo ad in g Beam 3.4.3 Criteria Any visible external leakage during the test shall result in a rejection of the device. 3.5.1 Purpose The purpose of this test is to determine conformance with the discharge requirement of 11 Umin (3 GPM) of water
27、in subfreezing temperatures. 3.5.2 Procedure See Figure 4. The device shall be installed per the manufacturers instructions with all of the hydrant that extends above the frost line contained within the colder chamber, with the portion below the frost line located outside the cold chamber at ambient
28、 room temperature and connected to a water supply. The cold chamber shall be maintained at -17.8“C (0F) f 1.2“C (+ 2F) during the test to simulate an actual installation in a subfreezing climate. Follow the manufacturers instruction to “winterize“ the device. After sixty (60) minutes at -1 7.8“C (0F
29、) f 1.2“C (+ 2“F), the 6 Freeze Resistant Sanitaty Yard Hydrants with Backflow Protection ASSE #1057* Issued: 2001 Copyright American Society of Sanitary Engineering Provided by IHS under license with ASSE Licensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/05/2007 02:09:24 M
30、STNo reproduction or networking permitted without license from IHS -,-,- device shall be turned to the full open position and a minimum of 1 Llmin (3 GPM) of water shall be discharged. This test is to be conducted at 138 kPa (20 psi.) supply pressure, and again at 690 kPa (100 p.s.) supply pressure
31、Figure 4 Cold Chamber Device on Test Above Ground I I Bury Depth I Frost Line I I Reservoir 3.5.3 Criteria Failure of the device to discharge 1 1 L/min (3 GPM) of water shall result in a rejection of the device. At no time shall the device externally drain water below the ground level. Any external
32、drainage or leakage of water below the ground level shall result in a rejection of the device. 3.6.1 Purpose The purpose of this test is to determine if leakage through the atmospheric vent port(s) occurs at or above 21 kPa (3 psi.). 3.6.2 Procedure The device shall be installed as in Figure 5. With
33、 valve number 2 closed, open valve number 1 and raise the inlet pressure to the point at which atmospheric vent leakage ceases. During this procedure, observe the point at which the highest rate of discharge occurs and adjust the inlet pressure to this point. Measure the flow rate of leakage. Freeze
34、 Resistant Sanitary Yard Hydrants with Backflow Protection ASSE #I057 Issued: 2001 7 Copyright American Society of Sanitary Engineering Provided by IHS under license with ASSE Licensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/05/2007 02:09:24 MSTNo reproduction or networkin
35、g permitted without license from IHS -,-,- Figure 5 Primary Supply Gauge Device on Test Valve #I Valve #2 Ring Inlet Outlet Piezometer 3.6.3 Criteria A flow rate exceeding 0.002 Lis (1/4 pint per minute) shall result in a rejection of the device. Leakage occurring at or above 21 kPa (3 p.s.) shall r
36、esult in a rejection of the device. 3.7.1 Purpose The purposeof this test is to determine if backflow into the inlet ofthe device when the atmospheric vent port(s) are sealed closed, the outlet check valve is held open and pressure is applied to the outlet of the device. 3.7.2 Procedure Blockopen th
37、e outlet checkvalve by suitable means and seal the atmosphericvents closed. Install the device as in Figure 6 and open the supply valve to raise the water level in the sight glass to 150 mm (6 inches) above thecenterline of the outlet checkvalve, then close the supply valve. Hold for five (5) minute
38、swhileobserving thewater level in the sightglass. Open the supply valve to raise ine waier ievei in ine sighi giass i 6 ri i feet) ave the eliieiiiie f the tkt hk iikie, then close the supply valve. Hold for five (5) minutes while observing the water level in the sight glass. Figure 6 Sight Glass Pr
39、imary Supply ba- l 6 m 1 (20 feet) Device on Test I 150mm + I 4 (6 inches) 1 , - Outlet Inlet 3.7.3 Criteria Any loss of level in the sight glass or leakage through the inlet check valve into the inlet shall result in a rejection of the device. O I 8 Freeze Resistant Sanitary Yard Hydrants with Back
40、flow Protection ASSE #lo57 Issued: 2001 Copyright American Society of Sanitary Engineering Provided by IHS under license with ASSE Licensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/05/2007 02:09:24 MSTNo reproduction or networking permitted without license from IHS -,-,- 3.
41、8.1 Purpose The purpose of this test is to ensure that the check valve prevents flow at 3 meters (1 O feet) of back pressure. 3.8.2 Procedure The device shall be installed as in Figure6. Fortypes 3,4 and 5, seal the atmosphericvents closed. Open the supply valve to raise the water level in the sight
42、 glass to 150 mm (6 inches) above the centerline of the outlet check valve, then close the supply valve. Hold for five (5) minutes while observing the water level in the sight glass. Open the supply valve to raise the water level in the sight glass to 3 m (10 feet) above the centerline of the outlet
43、 check valve, then close the supply valve. Hold for not less than five (5) minutes while observing the water level in the sight glass. 3.8.3 Criteria Any loss of water level in the transparent tube or leakage through the outlet check valve, as observed at the atmospheric vents, shall result in a rej
44、ection of the device. 3.9.1 Purpose The purpose of this test is to ensure that the backflow prevention device prevents backflow due to back siphonage. 3.9.2 Procedure All check valves shall be fouled with a 0.8 mm (0.032 in ) diameter fouling wire, in accordance with Figure 7. Install the device, in
45、 the open position as in Figure 9 with a sight glass of 15 mm (112 inch) internal diameter. The following vacuum loads shall be applied in sequence: (1) Apply and hold a vacuum of 635 mm (25 inches) of mercury for five (5) minutes, (2) Raise the vacuum slowly from O mm (O inches) to 635 mm (25 inche
46、s) of mercury, and then (3) Create a surge effect by opening and closing a quick acting valve. The applied vacuum shall Figure 7 slowly reduce it to O mm (O inches) of mercury, vary between O mm (O inches) to 635 rnm (25 inches) of mercury during the test. I (a) Slitted Disk (b) Bevel Seat (c) O-Rin
47、g Seat (d) Flat Disc CL Seat LLocation (e) Swing Check (0 poppet Type (9) poppet TY Pe (h) Nozzle Type Body Flat or level seat body L place wire within this quadrant I wire Freeze Resistant Sanitaty Yard Hydrants with Backflow Protection ASSE MO57 Issued: 2007 9 Copyright American Society of Sanitary Engineering Provided by IHS under license with ASSE Licensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/05/2007 02:09:24 MSTNo reproduction or networking permitted without license from IHS -,-,- Figure 8 3.9.3 Criteria Any rise of water in the sight glass shall
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