Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
pressure vessel
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: function-based → ≡
The definition focuses on the designed capability to withstand pressure loads, which is a functional requirement. The identity is given by the ContainmentFunction specialized for pressure-bearing service, not by any specific structural mechanism.
Validation status
Why primitive (necessary only)
Reviewer notes
FOL theory & disjointness
First-order logic theory (generated)
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Disjoint with
▸
Expert review
— accepted
Axiomatization steps
1
Identity-Giving Function
✓ done
PressureContainmentFunction → PressureContainmentProcess ⊑ MaterialContainment
▼
COPI-Core operation
MaterialContainment via process parent MaterialContainment
LLM rationale:
The identity-giving function is the designed capability to safely contain fluids or gases under internal and/or external pressure. This specializes the broader ContainmentFunction by adding the pressure-bearing requirement.
▸
Expert review
— accepted
2
Genus Proximus
✓ done
Vessel · Assembly
▼
Genus (genus proximum)
Most specific superclass — may be a domain class like "Valve" or an IOF-Core root.
BFO/IOF-Core Root
bfo:Object branch
bfo:ObjectAggregate branch
bfo:ImmaterialEntity branch
LLM rationale:
From parent candidates, 'Static Equipment' is too broad. The most specific appropriate superclass is 'Vessel', which is already enriched in the ontology with ContainmentFunction. Pressure vessel is a specialized vessel designed for pressure service.
▸
Expert review
— accepted
3
Differentia Specifica
✓ done
∃bearerOf.PressureContainmentFunction
▼
Conditions that distinguish
Pressure Vessel
from sibling classes under genus
Vessel.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
The differentia is the specialized pressure-bearing capability that goes beyond basic containment. This requires pressure-rated design, materials, and construction standards.
▸
Expert review
— accepted
4
Necessary Parts
✓ done
no necessary parts
▼
Consider part-whole relations beyond subsumption:
hasComponentPartAtAllTimes (universal, structurally essential)
· hasComponentPartAtSomeTime (contingent, optional component)
LLM rationale:
These parts are universal requirements for pressure containment capability - a pressure-rated shell provides the containment boundary, and pressure-rated nozzles provide controlled access.
▸
Expert review
— accepted
5
Process Participation Signature ⟨I, O, T⟩
✓ done
PortionOfFluid → PortionOfFluid
▼
Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
Pressure vessels contain pressurized fluids (liquid, gas, or multiphase) maintaining pressure integrity without altering the fluid composition. Input/output count varies based on vessel design and service.
▸
Expert review
More
Alternative labels
none
▼
Synonyms / alternative labels (comma-separated) — skos:altLabel
Language auto-detected on export (PT if the label contains accents, EN otherwise).
Properties as BFO qualities
no CFIHOS/DEXPI properties
▼
No CFIHOS/DEXPI properties found for this cluster.
Custom axioms
none
▼
Axioms not produced by the pipeline. Each is appended verbatim as an
rdfs:subClassOf restriction on Pressure Vessel.
Write the restriction block in Turtle syntax (without the leading
rdfs:subClassOf).
Example: [ owl:onProperty :hasPart ; owl:someValuesFrom :Wellhead ]
Cross-standard divergences
none detected yet
▼
Click "Detect divergences" to analyse cross-standard disagreements for this cluster.
Source Definitions (1)
Pressure Vessel — Class
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Provenance tiers (1)
Sources the pipeline cited while building this entry. Verbatim = the quote was copied word-for-word from that source; summary = paraphrased.
Linked competency questions
- answered Which equipment classes in COPI have iof:Assembly as their BFO genus root?
- answered Which equipment classes in COPI participate in a SeparationProcess?
- answered What is the difference between a pressure vessel and a storage tank in COPI?
- answered Is an absorber a subtype of pressure vessel in COPI?
- answered Is a storage tank necessarily a pressure vessel?
- answered What is the genus of a coalescer in COPI?
OWL/Turtle preview
Download .ttl
Numeric
COPI_* IRIs from copi-iri-map.tsv, with the readable name as a trailing comment. Names not yet in the map stay readable.
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ID 60 · claude-sonnet-4-20250514
Created 2026-04-13 23:41
Updated 2026-09-08 12:26
