There is a not a "standard" depth. It depends on a bunch of factors including the type of ground, what traffic may be expected above the pipe, whether you have to provide protection against freezing, the requirements of applicable design codes, etc.
If you could provide a few more details on the specific application, it would be helpful to answering your question.
For example, if its a regulated gas, CO2 or petroleum pipeline in the US, you will find the minimum depths in the CFRs 49 Part 192, 194 and ANSI B31.4 and B31.8
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"The problem isn't working out the equation,
its finding the answer to the real question." BigInch
As BigInch mentioned, the codes will give minimum depths, but depending on the location, service, etc a risk assessment may dictate additional cover. For example, I am working on a high pressure gas pipeline that because of the factors involved, it has been decided based on a risk assessment to have 2m cover rather than a more traditional 1m.
Greg Lamberson, BS, MBA
Consultant - Upstream Energy
Website:
If you're running water and sewer, depth is dependant on geographic location and the depth of the frost line and any existing lines that you may cross (depth of existing lines also applies to HC lines).
That's OK in Oklahoma. In south Texas, Florida etc. that's zero. In ND, that's 6ft and too deep.
Gas gathering lines and heavy oil lines are often pretty hot and can heat the soil. But it pays to remember that hydrates can form at temperatures above 32F.
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"The problem isn't working out the equation,
its finding the answer to the real question." BigInch
