Hot Tapping The Pipe - Mr1 Mid-Radius; Cold Tapping The Pipe - Mr1 Mid-Radius - GE T17 Installation Manual

2.3.7 Hot Tapping the Pipe - MR1 Mid-Radius

WARNING!
and safety practices during these procedures.
For 3 in. Flanges:
1. Install 3 in. ANSI flanged isolation valves on both nozzles (full bore, 8 in. face to face for 150# RF or
11.125 in. for 300# RF) with a gasket and 5/8 in. (for 150# rated flanges) or 3/4 in. (for 300# rated flanges)
diameter studs and nuts. Orient the valve handles to minimize interference.
2. Hot tap holes in the pipe using a hot tap machine equipped with a 3/4 in. (19.05 mm) drill bit. Then use a
coupon retaining hole saw to cut a hole with a diameter of 2.50 in. (63.5 mm) minimum.

2.3.8 Cold Tapping the Pipe - MR1 Mid-Radius

WARNING!
and safety practices during these procedures.
The procedure for cold tapping a pipe is the same as the hot tapping procedure. However, an isolation valve is not
necessary during the process. The hot tapping medium can be applied directly to the nozzle. Isolation valves will be
added after the tapping is complete.
Model T17 Installation Guide
Hot tapping should be performed only by qualified personnel. Follow all applicable code
Cold tapping should be performed only by qualified personnel. Follow all applicable code
Chapter 2. Installing the Pipe Nozzles
35