Abandoned Pipeline Decommissioning
December , 2009
The divers then installed 400 lb hydraulic clamps at each cut,and a subsea pig launcher was connected. The pumping of a gel train through the 10-inch pipe for internal cleaning was prevented by multiple breaks in the heavy wall pipeline. Instead hot taps were installed to provide a method to vacuum the line contents to vac trucks located on the support barge. The sequence of events was repeated a number of times at the line high points to complete the cleaning of the entire line for accepted abandonment by the ADEC and EPA.