P&ID extraction for petrochemicals.
Petrochemical drawings come in trains. Cracker, separation, polymer. Each carries its own revamp history and its own redlines, and a complex routinely runs into the thousands of pages before utilities are counted.
- I/O list with ISA 5.1 signal classification for the BPCS
- Separate SIS instrument index with SIL allocation
- Equipment list keyed to vessels, columns, exchangers, and pumps
- Line list with pipe spec breaks and service classification
- Revision comparison reports for MOC packages
- Marshalling and I/O-card count estimated from the signal-classified I/O list
- Cracker units carry BPCS regulatory loops and IEC 61511 SIS protective layers. Extracted and kept distinct
- Polymer P&IDs mix metric and imperial unit conventions. Line specs preserved as drawn
- Off-page connector matching across 50-200 page sets ties cross-train interlocks together
- Compressor strings, API 617 centrifugal, API 618 reciprocating carry vibration, temperature, and seal-system instrumentation as a dense sub-block
- Furnace and reactor effluent service drives high-temperature instrument selection, mineral-insulated thermocouples, skin TCs. Line list spec column captures the metallurgy break
- Olefins recovery sections run cryogenic. Hastelloy, austenitic stainless, and 9% nickel piping appear across the same set
- Pneumatic and electronic signaling coexist on legacy units. The I/O list flags pneumatic-only loops for modernization scoping
- OSHA PSM 1910.119 covers covered processes and drives MOC discipline
- IEC 61511, ISA 84 governs SIS lifecycle and proof-test scheduling
- Local jurisdictional analogues, PSR in Canada, COMAH in the UK add equivalent documentation requirements
Which discipline reads it.
Controls EngineerControls EngineersBPCS and SIS instrumentation across cracker, separation, and polymer trains. Signal-class plus SIS prefix separation enforced on the I/O list.Process EngineerProcess EngineersMass and energy balance across furnace, reactor, and separation sections. Line-spec breaks tied to service and metallurgy transitions.Piping and Mechanical EngineerPiping and Mechanical EngineersHigh-temperature alloy piping classes, Hastelloy, austenitic stainless, 9% nickel cryogenic. Rotating-equipment density on compressor strings.Functional Safety EngineerFunctional Safety EngineersIEC 61511 SIS lifecycle on hydrocracker, alkylation, and ethylene scope. Voting architecture preserved on PSH, PALL pairs.
FT-2103-AFlow transmitter, train 21, loop 03, redundant APSV-4101Pressure safety valve, unit 41, line 01PSH-7250-1oo2Pressure switch high, voted 1-out-of-2, SIS serviceAT-3505Analyzer transmitter, typically online GC on cracker overheadTIC-5210Temperature indicating controller on a polymer reactor jacket loopZSC-V-9012Block valve closed feedback on an emergency isolation serviceRelated
GlossaryBasic Process Control System, BPCSGlossarySafety Instrumented System, SISGlossaryIEC 61511AudienceFor Controls EngineersAudienceFor Process EngineersAudienceFor Piping and Mechanical EngineersAudienceFor Functional Safety EngineersSolutionBrownfield P&ID digitizationSolutionP&ID revision comparisonConvertP&ID to I/O listConvertP&ID to instrument indexConvertP&ID to line list