ASTM C118-11 PDF

1.1 This specification covers nonreinforced concrete pipe to be used for the conveyance of irrigation water with working pressures, including hydraulic transients, as shown in Table 1 and for use in drainage.

1.2 A complete SI companion to Specification C118 has been developed-C118M; therefore, no SI equivalents are presented in this specification.

Note 1 - This specification is for manufacturing and purchase only and does not include requirements for bedding, backfill, installation, or field repairs. The owner is cautioned that he must correlate field conditions with the characteristics of the pipe specified and provide inspection during installation.

TABLE 1 Standard Dimensions, Working Pressure, and Test Requirements for Standard Concrete Irrigation PipeA

Internal Designated Diameter, in.Thickness
of Wall,
T, in.Working
Pressure,B
ftMinimum Internal Hydrostatic Test Pressure, psiMinimum
Three-Edge-Bearing
Load, lbf/linear ft 67/830501300 813050 1350 10 11/830501400 12 1¼25451500 14 1³/825451600 15 1½25451650 16 1½25451700 18 1¾25451800 20 225401850 21 21/825401900 24 2¼25402000

A For hydrostatic test requirements, refer to 10.5.

B Higher working pressures are not prohibited up to a maximum of 40 ft for 6 through 8-in. diameters, 35 ft for 10 through 12-in. diameters, and 30 ft. for 14-in. through 24-in. diameters. In these cases, the strength of the pipe shall be increased to give a minimum of at least four times the design working pressure when tested as specified in 10.5.

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Published :	09/01/2011
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