The four fittings are permanently secured to the line.
2.
Temporary SANDWICH® Valves are installed on the fittings, and taps are made through the valves.
3.
Two STOPPLE® Plugging Machines are installed. Product is diverted through the temporary bypass. The isolated section is purged. Modifications are made to the isolated pipe section. The new section is purged and equalized, and the plugging heads are retracted.
4.
The temporary bypass is removed. LOCK-O-RING® Plugs are installed in the STOPPLE® Fittings with a tapping machine. All equipment is then removed and blind flanges are installed on the fittings to complete the job.
