1. SCOPE
2. REFERENCES
3. DEFINITIONS AND ABBREVIATIONS
3.1 Definitions
3.2 Abbreviations
4. GENERAL REQUIREMENTS
4.1 Site conditions
4.2 Instrument Data Sheet
4.3 Units
4.4 Nameplates
5. DESIGN CONSIDERATIONS
5.1 General
5.2 Electronics
5.3 Wireless Instruments
5.4 SIS Instruments
5.5 Low Temperature and Cryogenic Applications
6. INSTALLATION CRITERIA
6.1 General
6.2 Connection Sizes and Types
7. PRESSURE, DIFFERENTIAL PRESSURE AND TEMPERATURE TRANSMITTERS
7.1 General
7.2 Specifications
7.3 Indicators
8. INSTRUMENT SPECIFICATIONS
1. Scope
This standard establishes the minimum requirements for material, design, codes, safety rules,
standards, and procedures to be followed for engineering and design of the field
instrumentation.
2. References
Reference is made in this standard to the following documents. The latest issues, amendments
and supplements to these documents shall apply unless otherwise specified.
SABIC Engineering Standards (SES)
D02-D02 Engineering Tools and Data Structure
R02-E01 Temperature Measurement Design Criteria
R03-E01 Pressure Measurement Design Criteria
R04-E01 Level Measurement Design Criteria
R05-E20 Custody Transfer Meters: Liquids
R05-E21 Custody Transfer Meters: Gases
R05-S02.Flow Instruments
R07-E01 Selection of Control Valves
R07-E03 On-Off Valves
R10-S01 Instrument Tubing Material Specification
R11-C01 General Instrument Installation Criteria
R11-C02 Standard Installation Drawings – Instrumentation
X01-E01 Control Systems Design Criteria
X03-G01 Safety Instrumented System Implementation Guidelines
Z01-G04 Measurement Units for Use in SABIC Projects
Basic Engineering Design Data (BEDD)
Applicable BEDD
International Society of Automation (ISA)
20
Specification Form for Process Measurement and Control Instruments, Primary
Elements, and Control Valves.
100 Wireless Systems for Industrial Automation: Process control and related applications.
International Electrotechnical Commission (IEC)
62591 Industrial communication networks – Wireless communication network and
communication profiles – WirelessHART
European Committee for Electrotechnical Standardization (CENELEC)
61326-1 Electrical Equipment for Measurement, Control and Laboratory Use – EMC
Requirements – Part 1: General Requirements
Process Industry Practices (PIP)
PNF0200 Vents, Drains, and Instrument Connection Details
3. Definitions and Abbreviations
3.1 Definitions
Instrument Data Sheet. Instrument data sheets are documents that contain physical and
functional parameters for each instrument. These parameters include but not limited to process
data, operating conditions, process connections, material of construction, signal ranges, and
manufacturer‟s model number and types. Per ISA 20, instrument data sheets are intended to
assist the specification writer to present the basic information. In this sense they are „short- form
specifications‟ or „check sheets‟ and may not include all necessary engineering data or
definitions of application requirements.
Instrument Specifications. Instrument specifications are the detailed requirements prepared
based on instrument data sheet.
3.2 Abbreviations
EMC Electro Magnetic Compatibility
EDDMS SABIC Electronic Data & Documentation Management System
PDP Power Distribution Panel
SIS Safety Instrumented System
UPS
Uninterruptible Power Supply
4. General Requirements
4.1 Site conditions
Refer to BEDD for details.
4.2 Instrument Data Sheet
4.2.1 An instrument data sheet shall be provided for each instrument.
4.2.2 As a minimum, templates for instrument data sheet shall be as per SES-D02-D02 EDDMS
seed files.
4.3 Units
Units of measurement shall be per SES-Z01-G04.
4.4 Nameplates
Instruments shall have integral stainless steel nameplate, written in English, displaying the
manufacturer information, tag number and service as a minimum.
5. Design Considerations
5.1 General
5.1.1 SES-R11-C01 installation requirements shall be considered during project design stage.
5.1.2 Licenser requirements and recommendations shall be followed.
5.1.3 Instrument wetted part materials shall be suitable for process conditions.
5.1.4 For any fluid which can block the instrument impulse line, instrument wetted parts shall be
purged or sealed by a diaphragm seal.
5.1.5 For flammable, viscous, toxic or corrosive applications instruments shall be diaphragm
sealed type.
5.1.6 Where diaphragm seals are used, they shall be continuous duty type and furnished as a
complete assembly. The seals with capillaries should be all-welded type.
5.1.7 Diaphragm seal unit shall be supplied with a flushing seal ring and flushing connection.
5.1.8 The length of both legs shall be identical for differential pressure instruments equipped with
diaphragm seals and capillaries.
5.1.9 Instrument manifold and bleed valves for differential pressure and pressure instruments
shall be in accordance with SES-R11-C02 requirements.
5.1.10 Instruments shall withstand 1.5 times of maximum operating pressure. Instruments exposed
to vacuum shall have protection to full vacuum.
5.1.11 Instrument piping or tubing materials shall meet the requirements of SES-R10-S01.
5.1.12 Instrument shall be suitable for operation in the site conditions as per BEDD.
5.1.13 Instruments protection shall be NEMA type 4X or equivalent, and if the instrument is located
within hazardous areas it shall be suitable for use in this area.
5.1.14 For oxygen service, the instrument shall be thoroughly cleaned and degreased. A
permanent tag stating that the instrument has been cleaned for oxygen service should be
tied to the instrument.
5.2 Electronics
5.2.1 Electronic instruments shall be supplied with integral terminal strips. Instruments without
terminal strips shall require SABIC approval.
5.2.2 Wired transmitters shall be with HART or FF (foundation fieldbus) communication protocol.
Use of other communication protocol or use of non smart transmitters shall require SABIC
approval.
5.2.3 Electronic transmitter shall be provided with over range and under range signal feature.
5.2.4 Electronic instruments shall comply with EMC requirements of EN 61326-1.
5.2.5 Requirement for additional corrosion protection shall be evaluated during the design.
5.3 Wireless Instruments
5.3.1 Usage of wireless instruments for control applications shall be with SABIC approval.
5.3.2 Wireless instruments shall be “ISA 100 Wireless Compliant” registered or in compliance with
IEC 62591.
5.3.3 Wireless instruments shall not be used in SIS applications.
5.4 SIS Instruments
5.4.1 Refer to SES-X01-E01 and SES-X03-G01 for details and selection guidelines of SIS
instruments.The SIS instruments shall be certified for use in safety applications.
5.4.2 Sensors used in SIS, shall be provided with the following information:
a. Safe Failure Fraction (SFF) (Diagnostic Coverage Factor)
b. Safe detected (Sd)
c. Safe Undetected (SUd)
d. Dangerous detected (Dd)
e. Dangerous Undetected (DUd)
f. Mean time to repair (MTTR)
g. Frequency of function checks requirements. (Proof Test Interval).
h. Probability of failure on Demand average value (PFD avg)
i. Hardware fault tolerance level (HFT)
5.5 Low Temperature and Cryogenic Applications
5.5.1 Conventional instruments are normally not suitable for low and cryogenic temperature
services. The installation shall therefore be arranged such that fluid in contact with these
instruments shall be at ambient temperature.
5.5.2 Cold service insulation is expensive, difficult to install and maintain. Instruments and their
installations shall be designed to minimize cold service insulation requirements.
6. Installation Criteria
6.1 General
6.1.1 Instrument installations shall meet the requirements of SES-R11-C01 and SES-R11-C02.
6.2 Connection Sizes and Types
6.2.1 As a minimum, the process connection on the instrument shall be 1/2 inch NPT. Depending
on process requirements, the connection size and type on the instrument shall be in
accordance with the relevant static equipment or piping SES. For sizes less than 1/2 inch
SABIC approval shall be required.
6.2.2 Instrument pneumatic signal connection and instrument air supply connection shall be
minimum 1/4 inch NPT.
6.2.3 Cable entry connection on the instrument shall be minimum 1/2 inch NPT.
7. Pressure, Differential Pressure and Temperature Transmitters
- General
- Transmitters shall have self diagnostics feature and configurable fault protection.
- If required, for harsh environment dual compartment housing should be provided.
Transmitters shall be equipped with a bracket suitable for mounting on 2 inch pipe or surface type installation. Mounting accessories shall be suitable for site conditions, as per BEDD. Other type of mounting shall require SABIC approval.
- Specifications
- Overall accuracy, including the combined effects of linearity, hysteresis, and repeatability, shall be +/- 0.1 percent of calibrated span or better.
- Differential pressure transmitters shall be suitable for over and under differential pressure ranges in either direction equal to the body pressure rating without any change in the calibration.
- Transmitters shall have integral terminations for wiring connections.
- Indicators
- All transmitters should have remote or integral local indicator.
- Remote indicators shall not be connected in series with the transmitter output.
- Local indicator shall be configurable in engineering units.
8. Instrument Specifications
- Temperature instruments shall be in accordance with the requirements of SES-R02-E01.
- Pressure instruments shall be in accordance with the requirements of SES-R03-E01.
- Level instruments shall be in accordance with the requirements of SES-R04-E01.
- Flow instruments shall be in accordance with the requirements of SES-R05-S02.
- Control valves shall be in accordance with the requirements of SES-R07-E01 and on-off valves with the requirements of SES-R07-E03 respectively.
- Custody transfer meters shall be in accordance with the requirements of SES-R05-E20 and SES-R05-E21.