By American Water Works Association
This handbook offers counsel and information on designing, fitting, and retaining PVC pipe and fittings in ingesting water distribution structures. assurance comprises production, hydraulics, chemical and abrasion resistance homes, exterior so much, strain capacities, flexibility rankings, deploy, fittings and appurtenances, becoming a member of, helps, transportation, garage, and upkeep. no matter if your application is at the moment utilizing PVC pipe or is thinking about its use for the 1st time, this handbook offers every little thing had to learn about this pipe and fittings.
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Additional info for PVC Pipe - Design and Installation
Table 5-1 shows the response of PVC pressure pipe to change in operating temperature. Anticipated operating temperature is a critical factor that must be considered in the proper design of a PVC pressure piping system. The hydrostatic pressure capacity of PVC pipe is temperature dependent. The hydrostatic pressure capacity of PVC pipe is also time dependent. The duration of a given hydrostatic pressure application must be considered in the design of a PVC pressure piping system. 31 120 130 140 - Notes: The maximum recommended service temperature for PVC pressure pipe and fittings is 140°F (60°C) while that for PVCO pressure pipe is 130°F (54°C).
Pipelines laid in highly plastic soils subject to high moisture contents are usually bedded in some type of granular material. In cases where the bedding material has a higher bearing value than the native soil, the value of F, should be calculated using the bedding material values, while the value of R, should be based on the native soil. In this case, the undrained shear strength values should be used for cohesion according to the “Phi = 0” principle. Actual values of the vane shear tests (AASHTO T223-76), unconfined compression tests (ASTM D2166), or standard penetration test (ASTM D1586) should be used when available.
As previously discussed, the vertical soil load on the pipe may be considered as the weight of the rectangular prism of soil directly above the pipe. The soil prism would have a height equal to the depth of earth cover and a width equal to the pipe outside diameter. 0 . 60 Note: In-between values of S, may be determined by straight-line interpolation from adjacent values. oo Modulus of soil reaction E'. The vertical loads on a flexible pipe cause a decrease in the vertical diameter and a n increase in the horizontal diameter.