This article is about Positive Displacement Meter Material Selection Criteria Design for Flow Measurement of Instrumentation and Control Systems as per International Codes and standards for Commercial Buildings, Plants and Refinery Projects.
Positive Displacement Meter Material Selection Criteria Design
Material Receiving General Checklist for Instrumentation & Control
General Requirements
For high-accuracy applications, liquid positive displacement meters shall be installed in accordance with requirements of API MPMS, Chapters 5 and 6. Manufacturer’s recommended installation requirements shall be applied as a minimum. (PIP PCCFL 001 Section 3.8.1 & 3.8.2; API MPMS Chapter 5 and 6)
The Vendor shall implement and maintain a Quality Program, which shall include clearly defined and documented procedures for the relevant Quality System functions. The Quality Program documents shall be made available to the Buyer Representative for review and audit. (34-SAMSS-118,Sec. 7.1)
The vendor shall provide certificate from the manufacturer to prove that each liquid positive displacement meter meets the following performance criteria: ( 34-SAMSS-118, Sec. 6.7; PIP PCCFL001 Sec. 3.8.7)
“Prior to shipment, the liquid positive displacement meter shall be
calibrated per Manufacturer’s standard within its normal flow range, at
ten incremented flow rates. At least 3 calibration points shall be within
the process operating range – at the maximum, normal, and minimum
flow rates. The flowing medium for calibrations can be either water or
Stoddard Solvent. (34-SAMSS-118,Sec. 7.2.1; PIP PCCFL001 Sec. 3.8.7)”
PD Meters intended for BI-directional use shall be calibrated in each direction. (34-SAMSS-118, Sec. 7.2.2; PIP PCCFL001 Sec. 3.8.7)
The supplier shall provide a copy of the manufacturer’s sizing software for pressure drop, rangeability, etc for the PD meter if available. ( 34-SAMSS-118,Sec. 10.2.2; PIP PCCFL001 Sec. 3.8.7)
Storage, Handling, and Preservation
The manufacturer’s storage, handling and preservation instructions to be followed.
Material Requirements
Purchase Order and Instrument specification sheet criteria shall be confirmed and compared with instrument stainless steel tags / labels and nameplates, and shipment checked for damage, prior to acceptance of the shipment.
Verify that all the instruments are from technically acceptable vendors.
Inlet and / or outlet ports shall be plainly marked to indicate proper flow direction. (PIP PCCFL001 Sec. 3.8.4)
“The PD meter and associated accessories shall operate continuously
under the following ambient air temperatures and humidity without any
degradation of the manufacturer’s guaranteed performance: (34-SAMSS-118, Sec. 4.2.1.1; PIP PCCFL001 Sec. 3.8.7)”
Positive displacement type meters shall comply with 34 SAMSS-118 (PIP PCCFL001 Sec. 3.8.7)
Positive displacement type meters shall be sized to operate between 30% and 80% of the upper range value of the nameplate rating (PIP PCCFL001 Sec. 3.8.8).
The meter housing shall be carbon steel unless otherwise specified on Saudi Aramco form 8020-118-Eng., ISS for liquid positive displacement Meter. (34-SAMSS-118 Sec 6.4.3.2; PIP PCCFL001, Sec. 3.8.7)
“The following information shall be stamped/embossed on the stainless steel tag permanently attached to the meter body: (34-SAMSS-118, Sec 8.1; PIP PCCFL001 Sec. 3.8.7)
– Manufacturer
– Part/Model No. – Serial No.
– Purchase Order No.
– Mark/Tag No.
– Nominal Size
– Flange Rating
– Capacity Data
– K-Factor ”
Flow direction shall be indicated by an arrow on the meter body and / or by the words IN and OUT on the piping connections. (34-SAMSS-118, Sec 8.2; PIP PCCFL001 Sec. 3.8.7 )
International Codes and Standards for Positive Displacement Meter
- 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
7. API MPMS – Manual of Petroleum Measurement Standards, Chapter 5, Metering, Section1, General considerations for Measurement by Meters, Fourth Edition, September 2005.
8. API MPMS – Manual of Petroleum Measurement Standards, Chapter 6, Metering Assemblies, Section 7, Metering Viscous Hydrocarbons, second Edition, May 1991, Reaffirmed, April 2007″
9. 34-SAMSS-118 – Positive Displacement Meters.
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