The pipe must be electrically continuous (or made electrically continuous by bonding around insulated joints, plastic pipe, or plastic water meters) to the point where the protector ground wire connects. A metallic underground water pipe must be supplemented by the metal frame of the building, a ...
The present invention provides a method for implacing a production casing 10 along an inverted underground arcuate path, as illustrated in FIG. 1. The path extends from a first position 12 on one side of a surface obstacle such as a river 14 to a second position 16 on the other side of...
There are also techniques for the lining of drinking water pipe lines which use on site spray techniques. These are cement mortar lining, which has been used by the industry for nearly 100 years and epoxy spray solutions. In both methods a centrifugal spray head is winched through the pipe ...
If no --specfile option (or short option -p) is given, extend starts with the highest station marked as an entrance which has at least one underground survey leg attached to it. If there are no such stations, the highest deadend station in the survey (or the highest station if there ...