Earthing and Bonding

Electromagnetic interference is a common problem when metallic piping is running in parallel or crossing power lines, either overhead or underground.

The induced voltages from the power line to the metallic piping can cause a series of problems, but the most severe and dangerous are when the induced voltage reach a unsafe level for people working along the pipeline, in faulty conditions of the power line or during lightning strike, the effect becomes more hazardous. Additionally induced currents or ohmic coupled leakage & stray currents (AC & DC) may be collected by buried metalwork and cause corrosion issues to them.

E & B solution has experience and engineering tools able to model above and below ground installations in order to examine in detail such effects and also to propose effective solutions so as to overcome these issues.

Leakage current flowing via the earth is commonly known as stray current. Stray currents starting from the leaking point return to their generation source.

On the way they may flow through buried metallic infrastructure, causing possible corrosion to them. There are unavoidable evidences that railway applications (either over or under ground), DC generating plants, high power lines do generate stray currents.

It is vital for underground metallic infrastructure such as pipelines & steel foundations which are in close proximity of a possible stray current generation source to examine the effect of possible stray current and to prevent its catastrophic consequences.

E & B is able to provide analysis of possible stray current generation and to propose methods so as to control and monitor the stray current flow and level.