Pipe corrugated Metal

Both steel and aluminum materials are used to manufacture corrugated metal pipes. Various characteristics of corrugated metal pipe are described, including such physical attributes as material, available sizes, standard lengths, protective linings and coatings, joints, and fittings. Performance characteristics include allowable internal pressure, external load capabilities, hydraulic resistance factor, wave speed, allowable leakage rates, and water quality tolerances. Installation and maintenance criteria include specifications; tapping methods; repair methods; installation, backfill, and protective requirements; and useful life. Information about common standards, industry groups, and reference publications is also included. 

Depth of cover

The minimum allowable depth of cover is the largest of:

For roads H=B/8+0.2(m) H=B/6(m) and not less than 0.6（m）

For railways H=B/4 and not less than 0.6(m)

There is a possibility to reduce depth of cover provided that suitable checking calculations will be made.

Durability