This article is about Variable Area Meter (Rotameter) For Flow Measurement of Instrumentation and Control Systems as per International Codes and standards for Commercial Buildings, Plants and Refinery Projects.
Variable Area Meter (Rotameter) Material Selection Criteria Design
Material Receiving General Checklist for Instrumentation & Control
Material Requirements
Purchase Order and Instrument specification sheet criteria shall be confirmed and compared with instrument stainless steel tags / labels and nameplates, all possible visual checks and shipment checked for damage, prior to acceptance of the shipment
Verify that all the instruments are from technically acceptable vendors (Attachment 1)
“The capacity of the selected meter shall be such that normal flow rate falls in middle one-third of chart or scale range.
(PIP PCCFL001 Sec.3.14.3)”
“For process flows, scales shall be graduated in percent units. Meter factors for maximum flow at 100% shall be engraved on scale.
(PIP PCCFL001 Sec.3.14.4)”
Scales for purge meters shall read directly in Standard Cubic Feet per Hour (SCFH) of air for gas service or Gallons per Hour (GPH) of water for liquid service. (PIP PCCFL001 Sec.3.14.5)
Glass tube meters shall only be used on air, inert gas and water at temperatures of 140q F (60q C) or less and pressures 100 psig or less.Owner’s approval is required for use of glass tube rotameter in other services.. (PIP PCCFL001 Sec.3.14.6)
For purge meter applications, a check valve shall be installed on the outlet of the meter to prevent back flow. (PIP PCCFL001 Sec.3.14.7).
International Codes and Standards for Variable Area Meter (Rotameter)
- Flow Nozzle Material Selection Criteria Design & Flow Measurement
- 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.
1. Attachment 1: Technically Acceptable Instruments, SAES-J-002
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