Instrumentation & Control (I&C) Engineering Standards Guide

1) Cross-cutting “core” standards (use on every project)

• Functional safety
  • IEC 61511 (SIS for the process industry) — lifecycle, SRS, SIL, proof tests
  • IEC 61508 (generic functional safety) — hardware/software SIL metrics, FMEDA
• Alarm management
  • ISA-18.2 / IEC 62682 (alarm lifecycle, KPIs, rationalization) Wikipedia
• FAT/SAT for automation systems
  • IEC 62381 (FAT/FIT/SAT/SIT procedures & checklists) IEC WebstoreIteh Standards
• PLC/SCADA software & networks
  • IEC 61131-3 (PLC programming languages) Wikipedia
  • IEC 61158 / IEC 61784 (fieldbus & industrial Ethernet profiles; PROFIBUS/PA, FF, HART, PROFINET, etc.) IEC Webstoreandry-tino.gitbooks.io
• Materials in sour service
  • NACE MR0175 / ISO 15156 (H₂S environments, material selection) ISO

2) Documentation & drawing deliverables

• Symbols, tags, identification (P&IDs, hook-ups, loops, I/O lists)
  • ISA-5.1 (Instrumentation Symbols & Identification; tagging rules) isa.org
  • ISA-5.4 (Instrument Loop Diagrams) — mandatory structure for loop sheets isa.org
  • ISA-20 (Instrument specification forms / data sheets)
• Batch processes (where relevant)
  • ISA-88 / IEC 61512 (models & terminology for batch control) Wikipedia

3) Hazardous areas, equipment protection & installation

• Area classification (define Zones/Divisions for layouts & cable routing)
  • IEC 60079-10-1/-10-2 (classification of gas/vapor & dust hazardous areas)
  • API RP 500 (Class/Division) & API RP 505 (Zone 0/1/2) for petroleum facilities. Latest editions in 2023 & 2025, respectively. AntpediaIntertek Inform+1
• Equipment protection concepts (Ex) & installation / inspection
  • IEC 60079 series (general reqs, Ex d/e/i/p/n/t; installation -14, inspection -17)
• Gas detection
  • IEC 60079-29-1/-29-2 (performance + selection/installation/maintenance)

4) Electrical & earthing for instruments

• Low-voltage installations / bonding
  • IEC 60364 (incl. earthing 60364-5-54) — complement IEC 60079-14 in Zones IEC Webstore
• EMC for industrial equipment
  • IEC 61326-1 (EMC requirements for instrumentation & control equipment)

5) Instrument air & pneumatics

• Compressed instrument air quality
  • ISO 8573-1 (air purity classes for particulate/water/oil) Atlas Copco
  • ISA-7.0.01 (Quality standard for instrument air; dew point, oil, solids) isa.orgANSI Webstore

6) Measurement standards — by instrument type

6A) Flow measurement (selection, sizing, installation, proving)

• Differential pressure primary elements — ISO 5167 series
  • -1 (general), -2 (orifice plates), -3 (nozzles/Venturi), -4 (Venturi tubes), -5 (cone meters) — design, installation, discharge coefficients ISOIteh Standards
• Ultrasonic (liquid & gas)
  • API MPMS Ch. 5.8 (liquid hydrocarbons by ultrasonic flowmeters) Accuris Standards Store+1
  • ISO 12242 (transit-time meters for liquids) Iteh Standards
  • ISO 17089-1 (ultrasonic meters for gas — custody transfer) Iteh Standards
• Coriolis
  • ISO 10790 (selection/installation/use guidance for Coriolis mass meters) (widely applied for liquids & gases; custody per API/AGA where applicable)
• Turbine (gas)
  • AGA Report No. 7 (turbine meters for natural gas) (with API MPMS Ch. 14 references)
• Ultrasonic (gas)
  • AGA Report No. 9 (gas ultrasonic meters) — custody transfer (align with ISO 17089-1)
• Orifice metering (gas)
  • AGA Report No. 3 / API MPMS 14.3 (orifice measurement of natural gas)
• Sampling, proving & property data (custody transfer context)
  • API MPMS Chapters 4 (proving), 7 (temp), 8 (sampling), 9 (density), 11 (PFV/corrections), 12 (calculation of petroleum quantities)

Tip: For custody transfer, align the meter’s type standard (ISO/AGA) with API MPMS requirements for installation, proving and uncertainty.

6B) Pressure, level, temperature

• Transmitters — performance test methods
  • IEC 60770 (industrial transmitters; performance) and IEC 61298 (evaluation methods, test setups) IEC WebstoreIEC
• Temperature sensors
  • IEC 60584-1 (thermocouple EMF tables & tolerances) & IEC 60751 (Pt RTDs) isa.org+1
• Level measurement
  • Follow device-family standards (e.g., radar/ultrasonic manufacturer standards) + IEC 61326-1 (EMC) and IEC 60079 if Ex; use ISO 5167 when DP level via head.

7) Control valves, actuators & accessories

• Control valve family (global baseline) — IEC 60534 series
  • 60534-1 (terminology, general), 60534-2-1 (sizing equations), 60534-3-1 (face-to-face), 60534-4 (inspection, routine & seat-leakage classes), 60534-8-x (noise & cavitation prediction) Iteh Standards+2Iteh Standards+2IEC Webstore
• Seat leakage (acceptance class)
  • ANSI/FCI 70-2 (Classes I–VI, test media & pressures) — widely referenced in datasheets & FAT/SAT fluidcontrolsinstitute.org
• Fire-safe type tests (specify for hydrocarbon service where required)
  • API 607 (quarter-turn soft-seated valves), API 6FA (valves fire test), ISO 10497 (fire type-testing of valves) OctalsteelHeating and ProcessAMP Projects
• Fugitive emissions (environmental compliance)
  • ISO 15848-1/-2 (FE type test & endurance), API 624 (rising-stem) & API 641 (quarter-turn) thermo-electra.comIEC Webstore+1
• Positioners / digital valve controllers
  • IEC 61514-2 (tests for intelligent valve positioners) Iteh Standards
• Actuator interfaces
  • ISO 5211 (part-turn actuator mounting), ISO 5210 (multi-turn/linear interfaces) — define flange/drive dimensions across vendors Iteh Standards+1

8) Telecoms, DCS/PLC networking & cybersecurity

• Industrial comms — IEC 61158 / 61784 (fieldbus & Real-Time Ethernet profiles) IEC Webstore
• Cybersecurity for IACS — IEC 62443 (policies, zones/conduits, technical controls) (apply across ESD/SIS, DCS, PLC, analyzers)

9) Typical mapping to I&C deliverables

• Hook-up drawings: ISA-5.1 for symbols/tags; ISO 8573-1 & ISA-7.0.01 for air; IEC 60079-14 for Ex installation; IEC 61326-1 (EMC); materials per ISO 15156 in sour service. isa.org+1Atlas Copco
• Loop drawings / I/O allocations: ISA-5.4 format; wiring to IEC 60364; Ex loops to IEC 60079-14/-11 (IS). isa.org
• Instrument datasheets & indices: ISA-20; device-family standards (e.g., ISO 5167, ISO 12242, ISO 17089-1). Iteh Standards+1
• Control narratives / cause & effect / alarm database: IEC 61511 lifecycle alignment; ISA-18.2/IEC 62682 for alarm design.
• FAT/SAT procedures & checklists: IEC 62381. IEC Webstore
• HAZOP/SIL: IEC 61511/61508; device SIL data per vendor FMEDA.

10) Notes on regional regulations you may need to layer on

• ATEX (EU): 2014/34/EU equipment; 1999/92/EC workplace (Zones).
• NEC/NFPA 70 (US): Articles 500/505 for Class/Division vs Zone; coordinate with API RP 500/505. AntpediaIntertek Inform
• PED (EU): 2014/68/EU (pressure equipment) — affects wetted instruments, valves.
• EI 15 (ex-IP 15) (UK): area classification for petroleum installations.

Quick Starter: “Most-Used on Every Oil & Gas Project”

• IEC 61511/61508 (SIS & FS lifecycle)
• IEC 60079 (hazardous areas – classification, installation, inspection)
• API RP 500/505 (US area classification) AntpediaIntertek Inform
• ISA-5.1/5.4 (symbols/tags & loop diagrams) isa.org+1
• ISO 8573-1 & ISA-7.0.01 (instrument air quality) Atlas Copcoisa.org
• ISO 5167 / API MPMS / AGA (flow) ISOAccuris Standards Store
• IEC 60534 + FCI 70-2 + API 607/6FA + ISO 15848 (control valves) Iteh Standardsfluidcontrolsinstitute.orgOctalsteelthermo-electra.com
• IEC 62381 (FAT/SAT/SIT) IEC Webstore

🔹 1) Process Analyzers

• General analyzer system design
  • ISA-76 (Modular component interfaces for analyzers)
  • ASTM D3764 / D7045 (performance validation of online analyzers)
• CEMS / gas analyzers
  • US EPA 40 CFR Part 60 & 75 (CEMS requirements for emissions)
  • ISO 12039 (CO, CO₂, O₂ measurement)
  • ISO 10723 (performance evaluation of analyzers for natural gas)
• Shelters & sample systems
  • IEC 60079 series (hazardous area analyzers)
  • ASTM D8147 (validation of online water content analyzers)

🔹 2) Cybersecurity for I&C

• IEC 62443 (Industrial Automation & Control Systems Cybersecurity) — zones/conduits, system security requirements, technical policies.
• NIST SP 800-82 (Guide to ICS security) — often referenced in oil & gas alongside IEC 62443.
• IEC 61511 Ed.2 Clause 8 (explicit cybersecurity requirement for SIS).

🔹 3) NEMA & Enclosures

• NEMA 250 (enclosures for electrical equipment: Types 1–13; weatherproof, dust-tight, corrosion-resistant).
• IEC 60529 (IP Code) — ingress protection, global equivalent to NEMA.
• NEMA ICS standards (ICS 6 for enclosures; ICS 2 for control devices).

🔹 4) Fire & Gas Standards (NFPA + API + ISA)

• NFPA 72 (National Fire Alarm & Signaling Code) — detector placement, alarm logic.
• NFPA 70 (NEC) (wiring for F&G devices).
• NFPA 497 (flammable gas/vapor classification).
• API RP 14C (F&G detection & protection for offshore production).
• ISA TR84.00.07 (Guidance on fire & gas mapping and performance design).
• EN 54 series (fire detection/alarm systems — common in Europe).

🔹 5) Instrument & Control Cables

• Design & type
  • IEC 60228 (conductor classes)
  • IEC 60502-1/-2 (power/control cables up to 30 kV)
  • IEC 60092-376 (marine/offshore instrumentation cables)
  • ICEA S-95-658 / S-73-532 (North America, control cables)
• Fire performance
  • IEC 60332 (flame retardancy tests)
  • IEC 60754 (halogen acid gas emission)
  • IEC 61034 (smoke density).

🔹 6) Cable Sizing & Wiring Practices

• IEC 60287 (current rating of cables, thermal sizing).
• IEC 60364-5-52 (cable selection & installation).
• NEC NFPA 70 Articles 310 & 725 (conductor ampacity, control wiring).
• IEEE 399 (Brown Book) (power distribution design; useful for sizing cross-checks).

🔹 7) Fire & Gas Mapping

• ISA TR84.00.07 (detection coverage, mapping methodology).
• FM 6320 (approval standard for gas detection).
• EN 60079-29-2 (selection, installation & maintenance of gas detectors).
• UK HSE EI guidance (often used for practical layout of detectors).

🔹 8) Instrumentation Networking

• IEC 61158 / IEC 61784 (Fieldbus & Ethernet industrial comms).
• IEC 61850 (substation comms, sometimes applied in oil & gas).
• IEEE 802.3 / 802.11 (Ethernet & wireless LAN in industrial networks).
• ODVA / PI / FieldComm group specs (PROFIBUS, PROFINET, HART-IP, FOUNDATION Fieldbus).

🔹 9) Bulk Material Standards (Installation Materials)

• ASTM A106 / A53 (pipe for impulse lines).
• ASTM A312 (SS pipes/tubing for instruments).
• ASTM A479 / A276 (SS bar for fittings & brackets).
• ASTM A269 (SS tubing).
• ASTM A105 / A182 (flanges & forgings).
• SAE / ASTM fastener standards (A193, A194 for bolts/nuts).

🔹 10) Level Sketches / Installation Drawings

• ISA RP3.1 (drawings for level instruments, dip tubes, displacers).
• ISO 5167 (if DP head-type level).
• IEC 60079-14 (for Ex installations).
• Common EPC practice: vendor GA + ISA hook-up drawings cross-referenced.

🔹 11) Safety Relief Valves (PSVs/PRVs)

• API 520 Part I & II (sizing, selection & installation of PRVs).
• API 521 (pressure-relieving & depressuring systems).
• API 526 (flanged steel safety valves — dimensional standard).
• API 527 (seat tightness test of PRVs).
• ASME VIII Div.1 UG-125 to UG-137 (relief device requirements in pressure vessels).
• ISO 4126 series (safety devices for protection against overpressure).

🔹 12) Other Commonly Missed Standards

• IEC 61514 (function blocks & positioners for control loops).
• IEC 62682 / ISA-18.2 (alarm management).
• IEC 62381 (FAT/SAT for automation systems).
• API 2000 (venting for tanks; often tied with level/pressure).

🔹 12) Ball Valves

• API 608 – Metal ball valves for refinery and general industrial service.
• API 6D – Pipeline and piping valves (ball, gate, plug, check).
• API 607 / ISO 10497 – Fire test for soft-seated quarter-turn valves.
• ISO 17292 – Metal ball valves for petroleum, petrochemical, and allied industries.
• ISO 5208 / API 598 – Pressure testing of valves (hydrostatic and seat tests).
• MSS SP-72 – Ball valves with flanged or butt-welding ends.
• API 6FA – Fire test for valves with bolted or welded bonnets (complementary).

🔹 13) Butterfly Valves

• API 609 – Butterfly valves: double-flanged, lug-type, and wafer-type designs.
• ISO 5752 – Face-to-face and center-to-face dimensions of flanged valves.
• MSS SP-67 – Rubber-seated and high-performance butterfly valves.
• API 607 / ISO 10497 – Fire test for quarter-turn valves.
• ASME B16.34 – Pressure-temperature ratings and dimensions.

🔹 14) Globe, Gate & Check Valves

• API 602 – Compact steel gate, globe, and check valves (≤ DN 100).
• API 603 – Corrosion-resistant, bolted bonnet gate valves.
• API 623 – Steel globe valves for refinery and petrochemical service.
• API 594 – Check valves: wafer, dual-plate, and lug-type.
• API 598 / ISO 5208 – Inspection and pressure testing.
• BS 1873 / BS 1868 – Globe and check valves for process service.
• API 624 / ISO 15848-1 – Fugitive emission qualification.
• ASME B16.34 – Design and dimensional requirements.

🔹 15) Flanges & End Connections

• ASME B16.5 – Pipe flanges and flanged fittings (NPS ½ – 24).
• ASME B16.47 – Large diameter steel flanges (Series A & B).
• ASME B16.10 – Face-to-face and end-to-end dimensions.
• ASME B16.25 – Buttwelding ends preparation.
• EN 1092-1 – Flanges and joints (metric series).
• API 6A – Flanges, studded and clamp connections (wellhead and Christmas tree).
• MSS SP-44 – Steel pipeline flanges (complementary to ASME).

🔹 16) Valve Testing & Inspection

• API 598 / ISO 5208 – Pressure testing for all valve types.
• API 6D Annex E – Additional testing for pipeline valves.
• API 624 / ISO 15848-1 – Fugitive emission tests.
• MSS SP-55 – Visual inspection of castings.
• API 607 / 6FA – Fire tests for valves.

🔹 17) Material Certification & Traceability

• EN 10204 – Metallic products – inspection documents (3.1 & 3.2).
• ASTM A105 / A182 / A350 / A694 – Forged carbon and alloy steels for flanges and fittings.
• ASTM A216 / A217 / A351 / A352 – Cast steels for valves and fittings.
• NACE MR0175 / ISO 15156 – Material selection for sour service (H₂S).
• PED 2014/68/EU – Pressure Equipment Directive (Europe).
• ISO 9001 – Quality management and traceability.
• ISO 17025 – Testing and calibration laboratory accreditation.

🔹 18) Safety Relief Valves (PSVs/PRVs)

• API 520 Part I & II – Sizing, selection & installation of PRVs.
• API 521 – Pressure-relieving & depressuring systems.
• API 526 – Flanged steel safety valves (dimensional).
• API 527 – Seat tightness test of PRVs.
• ASME VIII Div.1 UG-125 to UG-137 – Relief device requirements for vessels.
• ISO 4126 series – Safety devices for overpressure protection.

🔹 19) Offshore Process Design – Best Practices

• ISO 19900 Series – Offshore structures (general requirements).
• API RP 14C – Analysis, design, installation, and testing of safety systems for offshore production.
• API RP 14E – Design and installation of offshore production platform piping systems.
• API RP 14F / 14FZ – Electrical systems for fixed and floating offshore installations.
• IEC 61892 Series – Mobile and fixed offshore electrical installations.
• NORSOK Standards (e.g., P-001, P-002, I-001) – Design principles for offshore process, utilities, and instrumentation.
• DNV-ST-F101 – Submarine pipeline systems.
• DNV-ST-N001 – Marine operations and lifting.
• IEC 61511 / IEC 61508 – Safety instrumented systems lifecycle.
• IEC 60092-376 – Marine/offshore instrumentation cables.
• IMO MODU Code – Fire and explosion protection, evacuation, and life-saving systems.

🔹 20) Onshore Process Design – Best Practices

• API RP 500 / 505 – Area classification for petroleum facilities (Class/Zone).
• API RP 521 – Pressure-relief and depressurizing systems.
• API 14C (applicable to onshore terminals) – Safety systems design philosophy.
• NFPA 30 / 70 / 72 – Flammable liquids, electrical, and fire alarm codes.
• IEC 60079 series – Electrical apparatus for explosive atmospheres.
• ASME B31.3 – Process piping design and fabrication.
• ISO 13703 – Piping and pipeline systems for petroleum and natural gas industries.
• API 610 / 614 / 682 – Centrifugal pumps, lubrication, and sealing systems.
• API 2350 – Overfill protection for petroleum storage tanks.
• API 2000 – Venting for atmospheric and low-pressure storage tanks.
• API 5000 Series – Mechanical integrity & risk-based inspection guidelines.
• IEC 61511 & IEC 62443 – Functional safety and cybersecurity integration.

🔹 21) General Design Integrity (Cross-Discipline)

• ISO 9001 – Quality management systems.
• ISO 14001 – Environmental management systems.
• ISO 45001 – Occupational health & safety management.
• ISO 31000 – Risk management principles and guidelines.
• ISO 14224 – Reliability and maintenance data for equipment.
• ISO 55000 – Asset management framework.
• IEC 60092 / 60364 – Electrical installations – onshore/offshore interface.
• API 17 / ISO 13628 – Subsea production systems.
• Shell DEP / BP GP / TOTAL GS – Company-specific engineering practices (adopted in EPC projects).