: Specifications for level switches, transmitters, and radar level measurement.
Recommends the use of intrinsically safe or explosion-proof instruments in hazardous environments. api rp 551 pdf
Officially titled "Process Measurement," API RP 551 is a recommended practice that provides guidelines for the selection, installation, operation, and maintenance of instruments used to measure pressure, temperature, level, and flow in refining and petrochemical services. : Specifications for level switches, transmitters, and radar
– Guidelines for pressure and differential pressure transmitters. : Specifications for level switches
Understanding the different editions of API RP 551 is crucial for ensuring you are referencing the most current and relevant information.
: The use of 3-valve and 5-valve manifolds for safe isolation and calibration.
When to use multiple transmitters for safety versus single instruments for cost-effectiveness. 5. Official Supplementary Specs (S-718)