Preparations For Installation; Flanges; Flange Installation Requirements; Process Flange And Purge Tube Dimensions - Siemens LDS 6 Operating Instructions Manual

Preparations for Installation

Preparations for Installation
CD 6C – Water vapor sensor for LDS 6
A5E00912721-01
This chapter provides pre-installation guidelines for the LDS 6
laser gas analyzer. The following requirements must be consid-
ered and the described preparations must be completed at the
measurement site before the installation of LDS 6 can be per-
formed.
2.1

Flanges

Before the gas analyzer and its sensors can be used, a pair of pro-
cess 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.

2.1.1 Flange Installation Requirements

The flanges should be welded to the wall of the furnace or fun-
nel.
The flange must protrude at least 100 mm (4") from the wall and
0-30 mm (0-1.2") into the furnace/funnel.
There are applications where furnace walls move due to varia-
tions in temperature. If the furnace walls move the sensors will
be miss-aligned and the measurement interrupted. To overcome
this the sensor 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 sensor flange. Remem-
ber that the flanges fitted for the sensors 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.

2.1.2 Process Flange and Purge Tube Dimensions

The process flange dimensions should comply to the DIN stan-
dard (DN80/PN16) or the ANSI standard (ANSI 4"/150 lbf). The
process flange dimensions are shown in Figure 2.1 and Figure
2.2.
Customer process flanges are not supplied by Siemens.
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