This article is about Pressure Gauges Material Selection Criteria & Design For Pressure Measurement of Instrumentation and Control Systems as per International Codes and standards for Commercial Buildings, Plants and Refinery Projects.
Pressure Transmitter Material Selection Criteria & Design
Material Receiving General Checklist for Instrumentation & Control
General 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
Pressure transmitters shall be Smart.
Instruments and control systems shall operate continuously under the following ambient air temperatures without any degradation of the manufacturer’s guaranteed performance:
Verify that all the instruments are from technically acceptable vendors. (Attachment 1)
All instrumentation purchases from manufactures that are not technically acceptable vendors, a request for technical evaluation, with justifications, shall be submitted in writing to the General Supervisor, Process Instrumentation Division, P&CSD.
The instruments should comply with the Saudi Aramco-defined standard conditions for process flow measurement
Verify the field transmission signals are 3-15 PSI, 4-20 mA and vendor specific digital protocols when used between their controllers and their respective field devices.
If HART communication protocol is used, verify that the superimposed digital signal is not used for plant control.
All fieldbus devices should have FOUNDATION Field bus certification as having passed the latest revision of Interoperability Test Kit (ITK).
Verify that the FF Devices and all function blocks shall be tested and certified by the host control system vendor.
Verify that the FF Devices and all function blocks shall be downloadable into the devices by the end user.
All fieldbus devices should be capable of performing continuous diagnostics, including self-test functions, to provide specific diagnostic information at the Man Machine Interface (MMI).
All fieldbus instruments shall include menu’s and method’s (wizards) to allow easy set-up and calibration from the MMI.
Verify “certificate of compliance” for each type of nonincendive device, clearly showing the nonincendive field wiring parameters embedded, in viewable format, in the Foundation Fieldbus Segment Calculator (FFSC), reference section.
“As a minimum, all pressure devices shall be specified with over-range protection to 1-1/2 times the maximum system operating pressure.
[PIP PCCPR001 Sec 4.1.4 April 2007]”
Materials selection for pressure device wetted parts shall be type 304 or 316 stainless steel with TFE gaskets, unless other materials are required by process. [PIP PCCPR001 Sec 4.1.7, April 2007]
Standard ranges shall be selected such that the normal operating pressure falls between 30% and 70% of the scale range.
International Codes and Standards for Pressure Gauges Material
- Flow Nozzle Material Selection Criteria Design & Flow Measurement
- Venturi Tube Material Selection Criteria Design & Flow Measurement
- SAES-J-002 -Technically acceptable instruments.
- SAES-J-003 – Instrumentation Basic Design.
- SAES-J-200 – Pressure.
- SAES-J-904 – FOUNDATION fieldbus Systems.
- PIP PCCPR001 – Pressure Measurement Criteria.
1. Attachment 1: Pressure Transmitter Approved Vendor List – SAES-J-002.
