This standard describes the thickness design of ductile-iron pipe complying with the requirements of ANSI\/AWWA C151\/A21.51, Ductile-Iron Pipe, Centrifugally Cast. Sec. 4.1 outlines the design procedure, and Sec. 4.2 gives a design example. Sec. 4.3 explains the basis of design. As opposed to using procedures in Sec. 4.1 or Sec. 4.3, the designer may reference Tables 12 through 14 directly. Table 12 lists thicknesses for standard laying conditions and certain depths of cover. Table 13 lists thicknesses for 150 psi-350 psi (1,034 kPa-2,413 kPa) water working pressure. The greater thickness from Table 12 or Table 13 for given trench load or internal pressure should be used. Table 14 lists working pressures and maximum depths of cover for standard laying conditions and standard pressure classes. Table 15 lists special thickness classes of ductile-iron pipe.<\/p>\n
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| 9<\/td>\n | Foreword I.\tIntroduction. I.A.\tBackground.\u2003The purpose of this standard is to provide pipeline designers with a recommended design procedure and associated tabular data necessary to establish the wall thickness(es) required for buried ductile-iron pipe based on the type of pipe em I.B.\tHistory.\u2003American National Standards Committee A21, Cast-Iron Pipe and Fittings, was organized in 1926 under the sponsorship of the American Gas Association\u00a0(AGA), ASTM\u00a0International (ASTM), AWWA, and New England Water Works Association (NEWWA). Betw <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 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 | ||||||
| 11<\/td>\n | II.\tSpecial Issues. 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: 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.\u2003Major revisions made to the standard in this edition include the following: V.\tComments.\u2003If you have any comments or questions about this standard, please call AWWA\u00a0Engineering 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 <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | AWWA Standard SECTION 1:\u2002GENERAL Sec.\u20021.1\tScope <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | Sec.\u20021.2\tPurpose Sec.\u20021.3\tApplication SECTION 2:\u2002REFERENCES <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | SECTION 3:\u2002DEFINITIONS SECTION 4:\u2002REQUIREMENTS Sec.\u20024.1\tProcedure for Calculating Thickness <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | Sec.\u20024.2\tDesign Example for Calculating Thickness <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | Sec.\u20024.3\tDesign Method <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | Sec.\u20024.4\tExplanation of Symbols Used in Design Equations <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | Sec.\u20024.5\tSpecial Thickness Classes SECTION 5:\u2002VERIFICATION SECTION 6:\u2002DELIVERY <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | Table 2\tDesign values for standard laying conditions Table 3\tAllowances for casting tolerance <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Table 4\tReduction factors R for truck load calculations <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | Table 5\tNominal thicknesses for standard pressure classes of ductile-iron pipe <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" AWWA C150-21 Thickness Design of Ductile-Iron Pipe<\/b><\/p>\n |