: Pressure measured relative to the atmospheric pressure.
The standard provides a structured approach to identifying and mitigating sources of error, crucial for calculating the overall performance uncertainty.
PTC 19.2 covers a wide variety of devices, providing guidance on their design, pressure ranges, and relative costs. Covered instruments include: Bourdon Tubes Manometers Pressure Transducers and Transmitters Deadweight Gauges/Piston Gauges 3. Calibration and Standards
The standard rigorously defines pressure types to avoid ambiguity:
Covers various pressure-measuring instruments, including their selection, application, and limitations. It includes detailed information on instrument design, accuracy, output, and relative cost. asme ptc 192 pdf
Understanding ASME PTC 19.2: The Standard for Pressure Measurement
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: Serves as verifiable proof of standard compliance during safety audits. : Pressure measured relative to the atmospheric pressure
Standards for ensuring instruments are functioning within known parameters. Measurement Uncertainty:
Methods for determining combined standard uncertainty and propagation into final results. Specialized Tools
For general industrial applications.
: Traditional barometers and U-tube columns utilized primarily as high-accuracy calibration benchmarks. Understanding ASME PTC 19
: Measured relative to a perfect vacuum reference.
is a Performance Test Code (PTC) publication from the American Society of Mechanical Engineers (ASME) that provides detailed instructions on how to measure pressure accurately. It is part of the Instruments and Apparatus (I&A) series, which provides guidance on specific types of measurements required by main performance test codes (e.g., steam turbines, boilers, or compressors).
While main PTC codes (like PTC 4 for boilers or PTC 10 for compressors) dictate what to test, PTC 19.2 dictates how to measure the specific variable of pressure. It is widely regarded as the industry bible for precision pressure measurement in industrial, aerospace, and power generation applications.
: The document covers a wide array of devices and installations, including: Piston Gauges (Nonmandatory Appendix A) Manometers (Nonmandatory Appendix B) Low-Absolute-Pressure (Vacuum) instruments (Appendix C) Differential-Pressure Transmitters and flow installations Critical Implementation Details