| Popis: |
Safe operation of the aging, 285,000 mile network of gas pipelines requires new means of inspecting the 214,000 miles of gas pipeline that is currently inaccessible to in-line inspection. Inspection from the surface would enable full access for evaluating integrity of the entire network. Superconductive, magnetic sensors (SQUIDs) alone offer the sensitivity needed to achieve the range and resolution required for evaluating integrity of gas pipeline from the surface. Their high resolution at frequencies of several Hertz enable a MAGNETIC TELESCOPE for penetrating a two meter overburden, as well as one half inch thick steel pipe. |
