Line Plugging / Line Stop

Line plugging / Line stop is a method of temporarily isolating and bleeding down part of a pressurized system, for purposes of alteration or maintenance within the isolated section. This is done without shut down of the entire system and without loss of product. If flow must be maintained, a temporary or permanent bypass can be installed around the isolated work section.

Topaz is currently equipped for the following:

In addition to extreme pressure and temperature conditions, Topaz is experienced with applications involving particularly volatile, corrosive, and toxic products.

 

 

Topaz maintains a large inventory of completion style fittings in common sizes and flange ratings for use in low and high-pressure line plugging services / line stop applications. These specialty fittings allow us to work through temporary valves, which Topaz provides, during the plugging operation. Once the repair or modification within the isolated work section is finished, we secure an o-ring sealed metal plug in the fitting below the temporary valve. Pressure is then bled off above the plug, the valve is removed, and a blind flange is installed on the fitting to complete the job. If necessary, line plugging / line stopping work can also be performed through permanent valves and standard hot tap fittings. When plugging through permanent valves, contact Topaz for required bore diameters and overall fitting and valve dimensions prior to welding.