Chapter 1. Installing Pipe Nozzles
10
T5 Flare Gas Transducer Installation Guide
1.2.4 Installing the First Nozzle (cont.)
3.
Slide the jig/nozzle assembly over the threaded rod, fitting the jig into the key cut end of the welding boss
while aligning the contoured end of the nozzle to the pipe arc.
4.
Align the nozzle scribe marks with the pipe scribe marks and tighten the assembly in place using the 1-in.
washer and nut provided. If slight misalignment occurs between the nozzle scribe marks and pipe scribe marks,
loosen the four bolts holding the jig and nozzle assembly, and rotate the nozzle for the best alignment. After the
nozzle has been accurately aligned, retighten the four bolts.
5.
The jig, boss, and nozzle assembly is designed to provide a 0.094 in. (2.4 mm) root gap between the beveled
edge of the nozzle and the outside diameter of the pipe. If this gap is not present all the way around the nozzle,
the nozzle must be removed and ground appropriately to provide the required clearance. If the root gap is larger
than the 0.094 in. (2.4 mm) dimension evenly all the way around the nozzle, then suitably sized washers may
be inserted between the jig and the nozzle to reduce the root gap dimension.
Jig
Nozzle
Threaded Rod
Welding Boss
End View
Washer and Nut
End View
