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| Steam/Water
Sampling |
The sampling system shall monitor key chemical parameters which relate to the quality of
process fluids in the steam-condensate-feedwater cycle and the quality of various other
process fluids. The system provides data to operating personnel for detection of
deviations from control limits so that corrective action can be taken. As a minimum, the
following components shall be included in each sample line:
• Inlet Isolation Valve
• Primary Sample Cooler
• Variable Pressure Reducing Valve
• Secondary Sample Cooler
• Blowdown Valve
• Pressure Indicator
• Temperature Indicator
• Total Sample Line Flow Indicator
• High Temperature Shutoff Valve
• Back Pressure Regulating/Relief Valve
• Grab Sample
• Analyzer Branch Lines and Valved Flow Indicators as appropriate
The water analysis equipment shall be designed complete with all sample conditioning
devices, analyzers, transmitters, indicators, recorders, annunciators, interlocks, etc.
The general arrangement of the water analysis equipment proposed shall be shown by the
bidder. The sample points and components on each line will be shown on the water analysis
system P&ID. |
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