Preparations For Installation; Flanges; Flange Installation Requirements - Siemens LDS 6 Operating Instructions Manual

Preparations for installation

3.1

Flanges

3.1.1

Flange installation requirements

Before the gas analyzer and its optics housings can be used, a pair of process flanges should be
installed at the measurement site. The flanges must be installed at a safe and accessible position
to make installation and service easy to accomplish.
The flanges should be welded to the wall of the furnace or funnel as shown in the figure below.
The flange must protrude at least 100 mm (4") from the wall and 0-30 mm (0-1.2") into the
furnace/funnel.
Figure 3-1
There are applications where furnace walls move due to variations in temperature. If the furnace
walls move the optics housings will be miss-aligned and the measurement interrupted. To
overcome this, the Optics Housing CD 6 can be fixed to a girder or other structure that is not
influenced by the temperature and the flexible metal tube is fitted between the process flange
and the optics housing flange. Remember that the flanges fitted for the optics housings must not
deviate more than ±2°.
Note
It is very important that the flanges are mounted so that they are aligned. Otherwise the
measurements will not be correct.
LDS 6, Optics Housing CD 6
Operating Instructions, 01/2022, A5E01134377-05
LDS 6, Optics Housing CD 6 mounted on a process flange
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