Coriolis and Thermal Mass Meter Material Selection Criteria Design

This article is about Coriolis and Thermal Mass Meter Material Selection Criteria Design of Flow Measurement of Instrumentation and Control Systems as per International Codes and standards for Commercial Buildings, Plants and Refinery Projects.

Coriolis and Thermal Mass Meter Material Selection Criteria Design

Material Receiving General Checklist for Instrumentation & Control

General Requirements

Verify that all the instruments are from technically acceptable vendors (Attachment 1).
Materials of construction shall be compatible with the process fluid. (PIP PCCFL001 Sec. 3.10.4)
Coriolis and Thermal Mass flow Meters shall be smart type. (PIP PCCFL001,Sec 3.16.4)

Material Inspection – Mass Meters (Coriolis)

Vibration of the meter tubes increases the potential for stress related corrosion. Corrosion mechanism should be given extra consideration. Most tubes have no corrosion allowance, particularly galvanic corrosion from dissimilar metals. (PIP PCEFL001, Sec. 4.12.4 to 4.12.7)
Coriolis meters should be sized for the desired accuracy at minimum and normal flow rates without exceeding the permissible pressure drop at the maximum flow rate. (PIP PCEF001, Sec 4.12.3)
Adequate discharge back pressure should be insured in liquid service to prevent flashing in meter tube. (PIP PCEF001, Sec 4.12.9)
Care should be taken to avoid subjecting the meter body to piping induced stresses. (PIP PCEF001, Sec 4.12.11)

Material Inspection – Mass Meters (Thermal)

Thermal sensors should only be applied where the fluid thermal conducting properties are well known. (PIP PCEF001, Sec 4.13.3)
To obtain stated accuracy, the meter should be calibrated using the actual fluid being measured. (PIP PCEF001, Sec 4.13.4)

International Codes and Standards for Coriolis and Thermal Mass Meter

1. Flow Nozzle Material Selection Criteria Design & Flow Measurement
2. Venturi Tube Material Selection Criteria Design & Flow Measurement

3. SAES-J-002 -Technically acceptable instruments, 23 June 2008
4. SAES-J-003 – Instrumentation Basic Design, 16 January 2008
5. SAES-J-100 – Process Flow Metering, 05 April 2008
6. PIP PCCFL 001 – Flow Measurement Criteria , August 2006, Process Industry Practices Process Control
7. PIP PCEFL 001 – Flow Measurement Guidelines , August 2006, Process Industry Practices Process Control