White Paper - T.D. Williamson, Inc.

83.3 SUBSTANTIAL SAVINGSAs part of the customer request to reduce costs, the STOPPLE ® Trainplugging system was utilized and met the requirement of providingsubstantial cost savings over other DB&B methods by reducing thenumber of fittings placed on the line. Further savings resulted from lessexcavation, fewer pieces of equipment, less welding and a shorteroverall job time (meaning less exposure to potential hazards forpersonnel).The most cost-effective aspect of this new plugging system stems fromthe fact that it is based on proven technology. Pressure ratings for theSTOPPLE ® Train system follow traditional STOPPLE ® parameters, andall standard STOPPLE ® tools apply to the maintenance of theSTOPPLE ® Train heads. Overall, use of the STOPPLE ® Train pluggingsystem requires nearly identical training, operation and maintenanceas for all STOPPLE ® systems, meaning many experienced users willsee very little change (other than a little extra plugging head travellength) from their typical plugging operations.4.0 ACTUAL FIELD JOBOn 20 November 2008, a Texas gas pipeline needed to be replaced.Part of the safety requirements included a DB&B method of pipelineisolation.On the day of the job, standard pressure tests on the STOPPLE ®Fittings were performed and then the hot taps were made. TheSTOPPLE ® Housing was installed and Blow Down and Equalizationhoses were installed. Sweeping was conducted and the STOPPLE ®Train system was set. The pipe was bled down and the seal wasobtained.