Keystone provided support to allow for the pigging of a 14” OD subsea gas export pipeline spanning 42 miles from Mars TLP to West Delta 143. In the 11 years since last pigging, the line had accumulated asphaltenes in addition to retrograde condensate, both of which presented challenges to stabilizing liquid returns at WD-143. In coordination with vendor, Keystone provided equipment and platform interface for temporary condensate handling during Turnaround window.