The purpose of this standard is to define the minimum requirements for water supply service plastic ball valves, including materials, design, testing, and shipping.<\/p>\n
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| 7<\/td>\n | Foreword I.\tIntroduction. I.A.\tBackground.\u2003Plastic ball valves have been in use since the 1950s. In 2001, the AWWA Standards Council received a request to develop a standard for plastic ball valves. As a result of this request, the AWWA Standards Council formed an exploratory ad h I.B.\tHistory.\u2003The first edition of this standard was designated ANSI\/AWWA C521-18, Plastic Ball Valves. The AWWA Board of Directors approved the first edition on October 24, 2018. This edition was approved on October 23, 2023. I.C.\tAcceptance.\u2003In 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 <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | II.\tSpecial Issues. II.A.\tMaterials.\u2003The materials section of this standard recognizes the advances that have been made in the development of nonmetallic materials for water ball valve construction. Plastic materials are currently being used for water ball valves; because of <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | II.B.\tPermeation.\u2003The selection of materials is critical for potable water, wastewater, and reclaimed water service and distribution piping systems in locations where there is likelihood the piping system will be exposed to significant concentrations of p II.C.\tChlorine and Chloramine Degradation of Elastomers.\u2003The 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 III.\tUse of This Standard.\u2003It 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 particular application being considered. III.A.\tPurchaser Options and Alternatives.\u2003The following items should be provided by the purchaser: <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | III.B.\tModification to Standard.\u2003Any modification to the provisions, definitions, or terminology in this standard must be provided by the purchaser. IV.\tMajor Revisions. V.\tComments.\u2003If you have any comments or questions about this standard, please contact Engineering and Technical Services at 303.794.7711; write to the department at 6666 West Quincy Avenue, Denver, CO 80235-3098; or e-mail at standards@awwa.org. <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | AWWA Standard SECTION 1:\u2002GENERAL Sec.\u20021.1\tScope Sec.\u20021.2\tPurpose Sec.\u20021.3\tApplication <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | SECTION 2:\u2002REFERENCES <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | SECTION 3:\u2002DEFINITIONS <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | SECTION 4:\u2002REQUIREMENTS Sec.\u20024.1\tMaterials. <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | Sec.\u20024.2\tGeneral Design Table 1\tPort diameter for body inlet, body outlet, and ball <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | Sec.\u20024.3\tWorkmanship and Coatings SECTION 5:\u2002VERIFICATION Sec.\u20025.1\tInspection Sec.\u20025.2\tManufacturer Testing <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | Sec.\u20025.3\tProof of Design Testing <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | SECTION 6:\u2002DELIVERY Sec.\u20026.1\tMarking Sec.\u20026.2\tPreparation for Shipment Sec.\u20026.3\tAffidavit of Compliance <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" AWWA C521-23 Plastic Ball Valves<\/b><\/p>\n |