This section covers practical aspects of pressure measurement installations, including , impulse lines , and proper placement of pressure taps and probes. The code specifies that only measurement methods and instruments specified in individual test codes are mandatory; other methods may only be used if agreeable to all parties to the test.
: Internal edges must remain free of rough burrs or ragged edges to avoid localized aerodynamic distortions. asme ptc 192
For performance tests, uncertainty analysis is not optional. ASME PTC 19.1 provides the methodology for evaluating test measurement uncertainties, and PTC 19.2 applies this specifically to pressure measurements. All parties to a test should agree in advance on acceptable limits of uncertainty; if the code requirements cannot be fully met, the parties should establish mutually acceptable uncertainty limits through prior agreement. For performance tests, uncertainty analysis is not optional
: Openings must orient perpendicular to the fluid flow vector to isolate true static pressure. Connecting Line Management : Openings must orient perpendicular to the fluid
Detailed instructions on the types of instruments to use, including dead-weight testers, elastic gauges (like Bourdon tubes), and liquid-column manometers. Installation & Calibration:
If you operate a gas turbine without a formal performance monitoring program, you are likely losing money without knowing it. replaces guesswork with engineering rigor. It provides a standardized, defensible, and practical methodology to answer three critical questions:
Proper placement of pressure taps, impulse lines, and probes directly affects measurement accuracy. The code specifies requirements for: