The standard's primary objective is to "specify and discuss the methods and instrumentation for testing boiler makeup and feedwater, steam, and condensate in relation to performance testing". This testing is crucial for both one-time acceptance testing of new equipment and continuous performance monitoring of existing plants.
High-pressure and high-temperature root valves must be installed directly at the sample point. These valves must be rated for the full process temperature and pressure to allow for safe isolation during maintenance. 3. Sample Transport Lines
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Once collected, the sample must be transported to the analysis point without any degradation or contamination. This section provides guidelines for sample line construction, including material selection, and addresses potential issues like deposition of impurities within the sample lines.
The standard details the geometry and placement of sample probes. Probes must extend into the pipe past the fluid boundary layer (the slow-moving fluid near the pipe wall) to capture the true characteristics of the bulk stream. 3. Sample Conditioning Requirements The standard's primary objective is to "specify and
Implementing ASME PTC 19.11 is non-negotiable for modern power plants looking to maximize uptime and extend the lifespan of multi-million dollar turbines and boilers. By understanding the principles of isokinetic extraction, thermal safety shut-offs, and secondary temperature control, engineering teams can design flawless monitoring networks that catch water chemistry deviations before they cause catastrophic failures.
The standard choice for sample lines, valves, and components. It resists corrosion and prevents sample contamination. These valves must be rated for the full
ASME PTC 19.11 is a Performance Test Code published by the American Society of Mechanical Engineers. The full title is
A standard Steam and Water Analysis System (SWAS) consists of several distinct stages. ASME PTC 19.11 dictates the design and performance metrics for each stage.
Impurities carry over from the boiler into the steam. They deposit onto turbine blades, causing aerodynamic losses, stress corrosion cracking (SCC), and pitting. Replacing a damaged turbine rotor can cost millions of dollars and cause months of downtime. 2. Boiler Tube Failures
: To get a truly representative sample, the velocity of the fluid entering the sampling nozzle must exactly match the velocity of the fluid in the main pipe.