The shallower the pipe is installed, the more it will be exposed to potential damage due to the traffic conditions above the installation. That said, the deeper the pipeline is installed, the more weight and external load forces that will be applied to the outer wall of the pipe due to the weight of the soil. Why is depth of cover so important in relation to selecting the correct wall thickness for the Ductile iron pipe in your application?Īs mentioned above, the general design of Ductile iron pipe is very conservative, which essentially allows for very little earth to be placed on the pipe while still performing without failure. We suggest visiting the Calculators tab within the McWane Pocket Engineer app for more details on exactly which pipe meets the specific needs for your application. Some variables that often come into play when selecting the required wall thickness of the pipe are:īecause of its durability and strength, in almost all cases, Ductile iron pipe requires a much thinner wall thickness, very little depth of cover, and a less stringent trench type requirement compared to alternate materials. But selection of the pipe to be installed should still follow the design criteria for the specific diameter and wall thickness of the pipe being installed. This is an “added benefit,” so to speak, in choosing Ductile iron pipe. In the simplest terms, depth of cover refers to how deep the pipeline will be installed, or how much earth and backfill (typically in feet) will be placed on top of the pipeline to restore the surrounding land to its original, or newly projected elevation.ĭuctile iron pipe is very conservatively designed, meaning it is typically a stronger product than the actual rating that the pipe may indicate. ![]() We’ll also discuss why it is important to choose the correct trench application, not only for today, but for future adjustments or improvements that are planned for the surrounding area where the pipeline is being installed. Within this article, we will discuss Depth of Cover and the key factors to consider when selecting the type of trench (or laying condition) for your application.
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