AWWA C516 2021

$76.92

AWWA C516-21 Large-Diameter Rubber-Seated Butterfly Valves, Sizes 78 In. (2,000 mm) and Larger

Published By	Publication Date	Number of Pages
AWWA	2021

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Category: AWWA

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Description

This standard establishes minimum requirements for rubber-seated butterfly valve assemblies that are 78 in. (2,000 mm) and larger in diameter with flanged ends suitable for fresh and reclaimed water having a pH range from 6 to 12 and a temperature range from 33 to 125°F (0.6 to 52°C), and suitable for a maximum steady-state fluid working pressure of 250 psig (1,724 kPa [gauge]), a maximum steady-state differential pressure of 250 psi (1,724 kPa), and a maximum full-open fluid velocity of 16 ft/s (4.9 m/s) based on nominal valve size in classes as defined in Sec. 1.1.1 and Sec. 1.1.2.

PDF Catalog

PDF Pages	PDF Title
7	Foreword I. Introduction. I.A. Background. Large-diameter butterfly valves are generally used for pipelines carrying water and gases in power generation facilities, water treatment plants, and major water supply and distribution lines. Butterfly valves are isolation and flow-contr I.B. History. The need for standardization of butterfly valves was recognized by the American Water Works Association (AWWA) with the adoption of AWWA C504 for Rubber-Seated Butterfly Valves in 1954. This companion standard was developed by the AWWA Stand I.C. Acceptance. In May 1985, the US Environmental Protection Agency (USEPA) entered into a cooperative agreement with a consortium led by NSF International (NSF) to develop voluntary third-party consensus standards and a certification program for direct
9	II. Special Issues. II.A. General. Conditions under which a valve is to be operated must be evaluated carefully by the purchaser. The evaluations must include the determination of the hydraulic characteristics of the system in which the valve will be installed and the operat II.B. Buried Valves: Valves in this standard are provided with flanged ends. In buried applications, the purchaser is advised to consider providing means to accommodate issues such as differential settlement, capability to remove the valve or actuator for
10	II.C. Advisory Information on Product Applications. This standard does not describe all possible applications or manufacturing technologies. The purchaser should identify special requirements and required deviations from this standard and include appropri
11	II.D. Advisory Information on Scheduling Requirements. Valves made in accordance with this standard are not “production run” products. They are custom designed and manufactured for the specific application. A consequence of this circumstance is that valve
12	II.E. Valve Discs and Piping Design. The discs of butterfly valves, when in the fully open position, intrude into the adjacent upstream and downstream piping or other adjacent devices. This can especially be an issue with adjacent pipe having interior lin
13	II.F. Effects of Manual or Power Actuator Stroke Time. When requiring manual and power actuators in Sec. III.A 6, 7, 8, and 9, consideration should be given to the effects of speed of valve operation on the pipeline hydraulic transients (surges), especial II.G. Chlorine and Chloramine Degradation of Elastomers. The selection of materials is critical for water service and distribution piping in locations where there is a possibility that elastomers will be in contact with chlorine or chloramines. Documented II.H Bolting Gray Cast Iron Flanges to Steel Flanges. The following recommendations are made for the use of high strength bolting used with either ASME or AWWA steel flanges when bolting to low ductility gray cast iron valve flanges. The ASME B16.1 standa
14	II.I Permeation by Organic Solvents or Petroleum Products. II.J Advisory Information on Valve Design. Modern calculation tools like FEA software can be used as a supplement to the equations listed in this standard for stress design. These calculation tools are able to show detailed stress concentrations on valve
15	III. Use of This Standard. It is the responsibility of the user of an AWWA standard to determine that the products described in that standard are suitable for use in the application being considered. III.A. Purchaser Options and Alternatives. The following information should be provided by the purchaser.
19	V. Comments. If you have any comments or questions about this standard, please call AWWA Engineering and Technical Services at 303.794.7711, FAX at 303.795.7603; write to the department at 6666 West Quincy Avenue, Denver, CO 80235-3098; or email at standa
21	AWWA Standard SECTION 1: GENERAL Sec. 1.1 Scope
22	Sec. 1.2 Purpose Sec. 1.3 Application SECTION 2: REFERENCES
24	SECTION 3: DEFINITIONS
27	SECTION 4: REQUIREMENTS Sec. 4.1 Data to Be Provided by the Manufacturer
28	Sec. 4.2 Materials.
29	Sec. 4.3 General Design Table 1 Laying length* ranges for flanged valves
38	Sec. 4.4 Valve Actuators
40	Table 2 Actuator application factors (AF)
43	Sec. 4.5 Welding and Fabrication
45	SECTION 5: VERIFICATION Sec. 5.1 Shop Tests
47	Sec. 5.2 Proof-of-Design Tests
50	Sec. 5.4 Nonconformance SECTION 6: DELIVERY Sec. 6.1 Marking
53	APPENDIX A Installation, Operation, and Maintenance of Large-Diameter Butterfly Valves