ISA 5.1 symbol
exported necessary COPI_0000136
Orifice Plate
IRI: https://www.inf.ufrgs.br/ontologies/copi/COPI_0000136
Generated onGerado em 2026-04-13
Natural Language DefinitionDefinição em Linguagem Natural
EN
An orifice plate is a flow measuring element that consists of a thin plate with a specified hole through which fluid flows to create differential pressure for flow rate measurement.
PT-BR
Uma placa de orifício é um elemento de medição de fluxo que consiste de uma placa fina com um orifício especificado através do qual o fluido flui para criar pressão diferencial para medição da taxa de fluxo.
Formal AxiomsAxiomas Formais
Semi-formal (Aristotelian)Semi-formal (Aristotélico)
Every orifice plate is a flow measuring element that has a thin plate component and has a specified hole component and bears a flow measurement function.
First-Order Logic TheoryTeoria em Lógica de Primeira Ordem
[Necessary condition]∀x (OrificePlate(x) → FlowMeasuringElement(x) ∧ ∃f (FlowMeasurementFunction(f) ∧ bearerOf(x,f))) — Steps 1–3: genus + identity-giving function [Function axiom: FlowMeasurementFunction]∀f (FlowMeasurementFunction(f) → ∀p (realizedIn(f,p) → FlowMeasurementProcess(p)) ∧ ∃p (FlowMeasurementProcess(p) ∧ realizedIn(f,p))) — Step 1: ∀ preserves type-type identity; ∃ rules out vacuous functions never realised [Structural differentia (necessary only)]∀x (OrificePlate(x) → ∃hasPart.ThinPlate ⊓ ∃hasPart.SpecifiedHole) — Step 3: structural property — necessary condition, not sufficient (OWA prevents ≡) [Necessary part: ThinPlate]∀x (OrificePlate(x) → ∃p (ThinPlate(p) ∧ hasComponentPartAtAllTimes(x,p))) — Step 4: mereological commitment — every instance must have this part [Process participation signature]∀x ∀f ((OrificePlate(x) ∧ FlowMeasurementFunction(f) ∧ bearerOf(x,f)) → ∃m (FluidPortion(m) ∧ participatesIn(m,f)) ∧ ∃e (FluidPortion(e) ∧ participatesIn(e,f)) ∧ processType(f,MeasurementTransduction)) — Step 5: typed participants in the realising process
OWL 2 / Turtle
@prefix copi: <https://www.inf.ufrgs.br/ontologies/copi/> . @prefix : <https://www.inf.ufrgs.br/ontologies/copi/> . @prefix owl: <http://www.w3.org/2002/07/owl#> . @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . @prefix xsd: <http://www.w3.org/2001/XMLSchema#> . @prefix bfo: <http://purl.obolibrary.org/obo/> . @prefix iof-core: <https://spec.industrialontologies.org/ontology/construct/> . @prefix iof-av: <https://spec.industrialontologies.org/ontology/annotation/> . @prefix skos: <http://www.w3.org/2004/02/skos/core#> . @prefix qudt: <http://qudt.org/schema/qudt/> . @prefix dcterms: <http://purl.org/dc/terms/> . @prefix foaf: <http://xmlns.com/foaf/0.1/> . @prefix apv: <http://inf.ufrgs.br/ontologies/apv#> . ### COPI — Core Ontology for Petroleum Installations ### Class module: OrificePlate <https://www.inf.ufrgs.br/ontologies/copi> rdf:type owl:Ontology ; dcterms:title "Core Ontology for Petroleum Installations (COPI)"@en ; dcterms:title "Ontologia Core para Instalações de Petróleo (COPI)"@pt-br ; dcterms:description "BFO/IOF-Core conformant ontology of equipment classes for petroleum production plants, developed using the five-step RDL enrichment method."@en ; skos:scopeNote "Material artifacts (bfo:material_entity) that (i) are part of a petroleum production plant, and (ii) bear at least one function whose realization involves the transport (e.g. production and injection), processing (separation and other processes), control, monitoring, measurement, containment or offloading of material or energy."@en ; skos:scopeNote "Artefatos materiais (bfo:material_entity) que (i) fazem parte de uma planta de produção de petróleo, e (ii) possuem ao menos uma função cuja realização envolve o transporte (p. ex. produção e injeção), processamento (separação e outros processos), controle, monitoramento, medição, contenção ou escoamento de material ou energia."@pt-br ; skos:scopeNote "COPI provides high-level equipment categories defined by function to demonstrate the defined-class mechanism. Equipment subtypes are annotated with references to CFIHOS and PCA RDL terms. COPI is not a reference data library; organizations should use CFIHOS, PCA RDL, or ISO 14224 for comprehensive equipment classification."@en ; skos:scopeNote "COPI fornece categorias de alto nível de equipamentos definidas por função para demonstrar o mecanismo de classe definida. Os subtipos de equipamentos são anotados com referências aos termos do CFIHOS e do PCA RDL. COPI não é uma biblioteca de dados de referência; organizações devem utilizar o CFIHOS, o PCA RDL ou a ISO 14224 para classificação abrangente de equipamentos."@pt-br ; owl:versionInfo "1.1.0-104-g4d16eff" ; owl:imports <https://spec.industrialontologies.org/ontology/core/Core/> ; owl:imports <http://purl.obolibrary.org/obo/bfo/2020/bfo.owl> ; dcterms:creator "Nicolau Oyhenard dos Santos"@en ; dcterms:contributor "Cauã Antunes" ; dcterms:contributor "Haroldo Rojas" ; dcterms:contributor "Rafael Petry" ; dcterms:contributor "Régis Romeu" ; dcterms:contributor "Mara Abel" ; dcterms:isPartOf <https://inf.ufrgs.br/projetos/OntoKG> ; dcterms:publisher "Universidade Federal do Rio Grande do Sul (UFRGS)"@en ; dcterms:license <https://creativecommons.org/licenses/by/4.0/> ; dcterms:created "2026-04-08"^^xsd:date ; dcterms:modified "2026-07-13"^^xsd:date ; apv:GlobalMinLanguageCoverage "en pt-br" ; apv:ClassURIFormationRule "https://www[.]inf[.]ufrgs[.]br/ontologies/copi/(COPI_[0-9]{7}|[A-Z][A-Za-z0-9]*)" ; apv:ClassMinAnnotationCoverage "rdfs:label https://spec.industrialontologies.org/ontology/annotation/naturalLanguageDefinition" . iof-av:naturalLanguageDefinition rdf:type owl:AnnotationProperty ; apv:MinAnnotationLength 20 . ### Identity-giving function :FlowMeasurementFunction rdf:type owl:Class ; rdfs:subClassOf iof-core:DesignedFunction ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:allValuesFrom :FlowMeasurementProcess ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:someValuesFrom :FlowMeasurementProcess ] ; rdfs:label "flow measurement function"@en ; rdfs:label "função de medição de fluxo"@pt-br . ### Process type :FlowMeasurementProcess rdf:type owl:Class ; rdfs:subClassOf iof-core:PlannedProcess ; rdfs:label "flow measurement process"@en ; rdfs:label "processo de medição de fluxo"@pt-br . :FlowMeasurementProcess rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasInput ; owl:someValuesFrom :FluidPortion ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasSpecifiedOutput ; owl:someValuesFrom :FluidPortion ] . ### Equipment universal: OrificePlate :OrificePlate rdf:type owl:Class ; rdfs:subClassOf :FlowMeasuringElement ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart) owl:someValuesFrom :FlowMeasurementFunction ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasComponentPartAtAllTimes ; owl:someValuesFrom :ThinPlate ] ; rdfs:label "orifice plate"@en ; rdfs:label "placa de orifício"@pt-br ; iof-av:naturalLanguageDefinition "An orifice plate is a flow measuring element that consists of a thin plate with a specified hole through which fluid flows to create differential pressure for flow rate measurement."@en ; skos:definition "An orifice plate is a flow measuring element that consists of a thin plate with a specified hole through which fluid flows to create differential pressure for flow rate measurement."@en ; iof-av:naturalLanguageDefinition "Uma placa de orifício é um elemento de medição de fluxo que consiste de uma placa fina com um orifício especificado através do qual o fluido flui para criar pressão diferencial para medição da taxa de fluxo."@pt-br ; iof-av:semiFormalNaturalLanguageAxiom "Every orifice plate is a flow measuring element that has a thin plate component and has a specified hole component and bears a flow measurement function."@en ; iof-av:firstOrderLogicAxiom "∀x(OrificePlate(x) → FlowMeasuringElement(x) ∧ ∃p,h(ThinPlate(p) ∧ SpecifiedHole(h) ∧ hasComponentPartAtAllTimes(x,p) ∧ hasComponentPartAtAllTimes(x,h)) ∧ ∃f(FlowMeasurementFunction(f) ∧ bearerOf(x,f)))"@en ; iof-av:isPrimitive "true"^^xsd:boolean ; iof-av:primitiveRationale "Constructive classification based on physical structure. Under OWA, any plate with a hole could potentially be classified as an orifice plate, but many perforated plates serve different purposes (structural, filtering, etc.). The structural differentia alone is not sufficient without industrial context validation."@en ; :ThinPlate rdf:type owl:Class ; rdfs:subClassOf iof-core:MaterialArtifact ; rdfs:label "Placa que possui geometria de espessura fina e"@pt-br ; rdfs:label "thin plate"@en . # Disjointness: OrificePlate and Valve [] rdf:type owl:AllDisjointClasses ; owl:members ( :OrificePlate :Valve ) . # Disjointness: OrificePlate and Pipe [] rdf:type owl:AllDisjointClasses ; owl:members ( :OrificePlate :Pipe ) . # Disjointness: OrificePlate and Filter [] rdf:type owl:AllDisjointClasses ; owl:members ( :OrificePlate :Filter ) .
Axiomatization Decision LogRegistro de Decisões
1 Identity-Giving FunctionFunção Identitária
Function class
FlowMeasurementFunction ⊑ DesignedFunction
Realized in
FlowMeasurementProcess ⊑ PlannedProcess
All orifice plates are designed to measure fluid flow rate by creating a differential pressure across the restriction. This is the generic function of the broader class, though specific subtypes may have additional roles like flow restriction.
2 Genus DeterminationDeterminação do Gênero
flow measuring elementbfo:Object (BFO_0000030)
From the ISO 15926 hierarchy, orifice plates are classified as 'VOLUME FLOW MEASURING ELEMENT - ORIFICE PLATE'. The parent_candidates shows 'instrument equipment' but FlowMeasuringElement is more specific and ontologically correct. Orifice plates are essentially monolithic measurement devices, making them MaterialArtifacts rather than Assemblies.
3 Differentia SpecificaDiferença Específica
∃hasPart.ThinPlate ⊓ ∃hasPart.SpecifiedHole

A flow measuring element that consists of a thin plate with a specified hole through which fluid flows to create differential pressure.

The defining structural characteristic is the combination of thin plate geometry with a specified hole. This differentiates it from other differential pressure flow measuring elements that use different physical mechanisms.
4 Necessary PartsPartes Necessárias
Part classParentRelation
ThinPlateMaterialArtifacthasComponentPartAtAllTimes
These are the universal structural components that define orifice plate identity across all subtypes, regardless of hole shape or configuration.
Process Participation SignatureAssinatura de Participação em Processo
InputsEntradas
{'type': 'FluidPortion', 'count': 1, 'constraints': 'single phase flow'}
OutputsSaídas
{'type': 'FluidPortion', 'count': 1, 'constraints': 'reduced pressure, measurable differential'}
TransformationTransformação
kinetic energy conversion to pressure differential for flow measurement
Orifice plates create a pressure drop by restricting flow, with the differential pressure being proportional to flow rate squared. Single phase constraint comes from onepetro definition.
Disjoint WithDisjunto com
Valve Pipe Filter
C4: Valve, Pipe, Filter. Process signature incompatibility: valves control flow (not measure), pipes conduct without restriction measurement, filters separate particles rather than measure flow rate through differential pressure.
MetadataMetadados
COPI IDCOPI IDCOPI_0000136
IRIIRIhttps://www.inf.ufrgs.br/ontologies/copi/COPI_0000136
StatusStatusexported
Axiom modeModonecessary
CreatedCriado2026-04-13
UpdatedAtualizado2026-06-25
LLM modelModelo LLMclaude-sonnet-4-20250514
VersionVersão2026-07-13