DURAG D-R 290, Operating Manual

Page: 74 / 202

5 | Installation
74 D-R 290
Example for thin-walled measurement ducts
Reinforcing gusset plates should be used for thin-walled ducts (see Fig. 5.7 ). For
stacks with flue gas temperatures over 250°C (480°F), additional heat shields for ther­
mal insulation in front of the measuring head and reflector are advisable (not shown).
In this case it may also be necessary to fit fail-safe shutters. Comply also with the in­
structions and specifications as for the standard installation ( 5.4.1 Standard installation
of the welded-in pipes with adjustment flanges [
}
70] ).
1 Duct wall 2 Support for the welded-in pipe
3 Welded-in pipe 4 Red dot at the top of the flange
5 Wall reinforcement
Fig. 5.7: Installation of a welded-in pipe with adjustment flange on a gusset plate