ASTM C 118 : 2011
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Standard Specification for Concrete Pipe for Irrigation or Drainage
Hardcopy , PDF
11-11-2014
English
01-09-2011
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 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 ft | Minimum Internal Hydrostatic Test Pressure, psi | Minimum Three-Edge-Bearing Load, lbf/linear ft |
|---|---|---|---|---|
| 6 | 7/8 | 30 | 50 | 1300 |
| 8 | 1 | 30 | 50 | 1350 |
| 10 | 11/8 | 30 | 50 | 1400 |
| 12 | 1¼ | 25 | 45 | 1500 |
| 14 | 13/8 | 25 | 45 | 1600 |
| 15 | 1½ | 25 | 45 | 1650 |
| 16 | 1½ | 25 | 45 | 1700 |
| 18 | 1¾ | 25 | 45 | 1800 |
| 20 | 2 | 25 | 40 | 1850 |
| 21 | 21/8 | 25 | 40 | 1900 |
| 24 | 2¼ | 25 | 40 | 2000 |
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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