ASTM C118M-11
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Standard Specification for Concrete Pipe for Irrigation or Drainage (Metric)
ASTM International , 09/01/2011
Pages: 4
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 This specification is the SI counterpart of Specification C118.
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, mm | Thickness of Wall, T, mm |
Working Pressure,B kPa |
Minimum Internal Hydrostatic Test Pressure, kPa | Minimum Three-Edge- Bearing Load, kN/linear m |
| 150 | 22 | 90 | 345 | 19.0 |
| 200 | 25 | 90 | 345 | 19.5 |
| 250 | 29 | 90 | 345 | 20.5 |
| 300 | 32 | 75 | 310 | 22.0 |
| 350 | 35 | 75 | 310 | 23.5 |
| 375 | 38 | 75 | 310 | 24.0 |
| 400 | 38 | 75 | 310 | 25.0 |
| 450 | 44 | 75 | 310 | 26.5 |
| 500 | 50 | 75 | 275 | 27.0 |
| 525 | 54 | 75 | 275 | 27.5 |
| 600 | 57 | 75 | 275 | 29.0 |
A For hydrostatic test requirements, refer to 10.5.
B Higher working pressures are not prohibited up to a maximum of 120 kPa for 150 through 200-mm diameters, 105 kPa for 250 through 300-mm diameters, and 90 kPa for 350 through 600-mm diameters. In these cases, the strength of the pipe shall be increased to give a minimum internal hydrostatic test pressure of at least four times the design working pressure when tested as specified in 10.5.
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