Place the pressure transmitter (e.g., Rosemount 3051 or Yokogawa EJA) at a fixed elevation. For liquid service, the transmitter should be below the tap. For gas service, above the tap.
To comply with the standard, a fixed pressure tap must meet specific geometric and installation criteria. Violating any of these rules introduces systematic uncertainty that cannot be calibrated out.
Pressure measurement is a cornerstone of performance testing for power plants, industrial equipment, and fluid machinery. To ensure consistency, accuracy, and reliability, the American Society of Mechanical Engineers (ASME) provides standard guidelines under the Performance Test Codes (PTC) series. focuses specifically on pressure measurement instruments and apparatus. asme ptc 192 fixed
Industrial facilities use the standard to ensure safety relief equipment functions reliably. Calibrating process pressure transmitters to the strict tolerances listed in the code ensures safety valves trip exactly at their designed setpoints. Mitigating Measurement Errors
Deploy the system and provide comprehensive training to plant staff on its use and benefits. Place the pressure transmitter (e
Any data collected under this code must undergo a thorough uncertainty analysis using the methodologies defined in ASME PTC 19.1 (Test Uncertainty) . The total measurement error stems from two distinct factors:
A fixed pressure tap cannot be placed anywhere. ASME PTC 19.2 prescribes minimum upstream and downstream straight lengths of pipe to ensure the velocity profile is symmetrical. To comply with the standard, a fixed pressure
Better alignment with modern, international uncertainty guidelines (similar to ISO GUM).
Guidance on the appropriate application of various measurement apparatus, from liquid-column manometers to high-precision electronic transducers.
The standard is structured to guide an engineer through the entire lifecycle of a measurement process: