Heat Tracing; Sampling System Installation - Siemens Maxum Edition II Installation Manual

3.6.5

Heat Tracing

Some vapor lines must be heated to prevent condensation. If heat tracing is required, it will be
noted in the "Notes" block on the Block Diagram Utility Connections sheet contained in the
Application Drawing Package.
When heat tracing is used, it is essential that none of the tubing be exposed to ambient
conditions. Steam tracing must be continuously sloped downward for draining any condensate,
and it must have condensate traps at any low points.
3.7

Sampling System Installation

The sampling system provides a conditioned process sample to the analyzer. In some
situations the sample system is provided by Siemens. This section is intended to provide
guidelines and is not intended to be a comprehensive installation procedure. Be sure to follow
local and national codes with regard to the installation of this equipment. If the sampling system
was provided by Siemens, then references will be given to link to the custom documentation
package. Refer to Application Drawing Package, Sampling System sheets for information
concerning sampling system.
Siemens Supplied Sample System
Note
All sample system characteristics described in this section are dependent on the configuration
and T-rating of the analyzer. See the Application Drawing Package for all site specific
requirements.
Note
Sample filtering is required to protect the sample valve from contaminants. See Refer to your
custom documentation to check on the requirements for your system. In some cases these are
installed at the factory.
Siemens sample systems typically receive process samples from the transport system at -18
to 122°C (0 to 250°F), and at 34 to 1724 kPa (5 to 250 psig) for gases, or 103 to 1724 kPa (15
to 250 psig) for liquids.
The process line selected for removal of the sample should have these characteristics:
● A horizontal run
● Containing a single sample phase (either all gas or all liquid)
● Close to the analyzer
● Reasonably protected from mechanical damage
● Reasonably easy to access for installation and removal of the sample probe.
Installation Manual
Installation Manual, 12/2019, 2000595 Rev 1
Installation Steps
3.7 Sampling System Installation
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