Flow Stopping and Pipe Sealing
Some two decades ago we developed a flow stopping system called FOAMBAG™ based on the use of expanding resin foam. The effective yet simple technique works on all types of pipe material including cast iron, steel and PE. Extremely versatile, it can be used on vertical or tapering pipes, bends and non- standard diameters. Although developed for flow stopping natural gas pipes, FOAMBAG™ can also be used to seal pipes carrying other gases and fluids.
The technique works by inserting a semi-porous bag into the pipe to hold the foam in place as it expands. At full expansion, some of the foam seeps through the semi-porous material to adhere to the pipe wall.
The technique is suitable for the use on low pressure gas services and mains from ¾ up to 36`` diameter and on medium pressure from ¾ to 8``. Above this diameter, pressure must be reduced. |
