CPC F16L 55/1283 (2013.01) [F16L 55/134 (2013.01); F16L 55/44 (2013.01)] | 22 Claims |
1. A pipeline pigging element (10) arranged to change its size in an axial and a radial direction as a function of applied pipeline pressure when traversing an interior of a pipeline, the pipeline pigging element comprising:
an elastomeric body (11) including:
a first circumferential band (13) having a first section modulus;
a second circumferential band (15) located adjacent the first circumferential band in the axial direction and having a second section modulus different than that of the first section modulus;
each of the first and second circumferential bands changing at different rates from one another between an uninflated and an inflated state at the applied pipeline pressure;
the elastomeric body, when traversing the interior of the pipeline, having a first length and a first diameter at a first applied pipeline pressure and a second length and a second diameter different than the first length and diameter at a second applied pipeline pressure different than the first applied pipeline pressure.
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