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validated equivalent COPI_0000745
Blind Flange
IRI: https://www.inf.ufrgs.br/ontologies/copi/COPI_0000745
Generated onGerado em 2026-09-08
Natural Language DefinitionDefinição em Linguagem Natural
EN
A blind flange is a flange that bears a pipe-end closure function: a solid plate with no central opening, bolted over a flanged pipe end to seal it off, rather than to connect it to another component.
PT-BR
Um flange cego e um flange que possui uma funcao de fechamento de extremidade de tubo: uma placa solida sem abertura central, aparafusada sobre uma extremidade de tubo flangeada para veda-la, em vez de conecta-la a outro componente.
Formal AxiomsAxiomas Formais
Semi-formal (Aristotelian)Semi-formal (Aristotélico)
Every blind flange is a flange that bears a pipe-end closure function and has a solid plate form quality, and conversely.
First-Order Logic TheoryTeoria em Lógica de Primeira Ordem
[Definition]∀x (BlindFlange(x) ↔ Flange(x) ∧ ∃f (PipeEndClosureFunction(f) ∧ bearerOf(x,f)) ∧ ∃bearerOf.PipeEndClosureFunction ⊓ ∃hasQuality.SolidPlateForm) — Steps 1–3: genus + identity-giving function [Function axiom: PipeEndClosureFunction]∀f (PipeEndClosureFunction(f) → ∀p (realizedIn(f,p) → PipeEndClosureProcess(p)) ∧ ∃p (PipeEndClosureProcess(p) ∧ realizedIn(f,p))) — Step 1: ∀ preserves type-type identity; ∃ rules out vacuous functions never realised [Process participation signature]∀x ∀f ((BlindFlange(x) ∧ PipeEndClosureFunction(f) ∧ bearerOf(x,f)) → processType(f,Containment)) — 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: BlindFlange <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" ; 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 "2026-10-07"^^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 :PipeEndClosureFunction rdf:type owl:Class ; rdfs:subClassOf iof-core:DesignedFunction ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:allValuesFrom :PipeEndClosureProcess ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:someValuesFrom :PipeEndClosureProcess ] ; rdfs:label "pipe end closure function"@en ; iof-av:naturalLanguageDefinition "A DesignedFunction that is realized in a PipeEndClosureProcess and that consists in sealing off an open, flanged pipe end so no fluid can pass, without joining it to another pipe or component."@en ; skos:definition "A DesignedFunction that is realized in a PipeEndClosureProcess and that consists in sealing off an open, flanged pipe end so no fluid can pass, without joining it to another pipe or component."@en . ### Process type :PipeEndClosureProcess rdf:type owl:Class ; rdfs:subClassOf :MaterialContainment ; rdfs:label "pipe end closure process"@en ; iof-av:naturalLanguageDefinition "A PlannedProcess in which a flanged pipe end is sealed by bolting a solid plate over its opening, preventing any fluid flow through that end."@en ; skos:definition "A PlannedProcess in which a flanged pipe end is sealed by bolting a solid plate over its opening, preventing any fluid flow through that end."@en . :MaterialContainment rdf:type owl:Class . ### Equipment universal: BlindFlange :BlindFlange rdf:type owl:Class ; owl:equivalentClass [ rdf:type owl:Class ; owl:intersectionOf ( :Flange [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart) owl:someValuesFrom :PipeEndClosureFunction ] ) ] ; rdfs:label "blind flange"@en ; iof-av:naturalLanguageDefinition "A blind flange is a flange that bears a pipe-end closure function: a solid plate with no central opening, bolted over a flanged pipe end to seal it off, rather than to connect it to another component."@en ; skos:definition "A blind flange is a flange that bears a pipe-end closure function: a solid plate with no central opening, bolted over a flanged pipe end to seal it off, rather than to connect it to another component."@en ; iof-av:naturalLanguageDefinition "Um flange cego e um flange que possui uma funcao de fechamento de extremidade de tubo: uma placa solida sem abertura central, aparafusada sobre uma extremidade de tubo flangeada para veda-la, em vez de conecta-la a outro componente."@pt-br ; iof-av:semiFormalNaturalLanguageAxiom "Every blind flange is a flange that bears a pipe-end closure function and has a solid plate form quality, and conversely."@en ; iof-av:firstOrderLogicAxiom "∀x (BlindFlange(x) ↔ Flange(x) ∧ ∃f (PipeEndClosureFunction(f) ∧ bearerOf(x,f)) ∧ ∃q (SolidPlateForm(q) ∧ hasQuality(x,q)))"@en ;
Axiomatization Decision LogRegistro de Decisões
1 Identity-Giving FunctionFunção Identitária
Function class
PipeEndClosureFunction ⊑ DesignedFunction
Realized in
PipeEndClosureProcess ⊑ MaterialContainment
Not a subtype of the genus Flange's own ConnectionFunction: a blind flange's purpose is the functional opposite (closing a line, not joining two). Treated as an independent new function per the Reuse vs. Creation Policy's 'New' case, matching the established precedent of 'blow down valve' (RapidDepressurizationFunction, not a Valve-function subtype, still genus=Valve, axiom_mode=equivalent).
2 Genus DeterminationDeterminação do Gênero
Flangebfo:Object (BFO_0000030)
All three definitions name PIPE FLANGE as parent; 'flange' (already enriched, genus=Coupling, exported) is the closest enriched supertype and matches the physical form (a flange plate that bolts to a mating flange) even though the function differs from the genus's own.
3 Differentia SpecificaDiferença Específica
∃bearerOf.PipeEndClosureFunction ⊓ ∃hasQuality.SolidPlateForm

Bears a pipe-end closure function and has a solid plate form with no central opening, as opposed to a generic flange, which has a bore for fluid passage and a connection function.

Functional differentia (the closure function) plus a quality capturing the defining negative structural trait (no central opening / solid plate), since 'absence of an opening' cannot be stated as a component part.
4 Necessary PartsPartes Necessárias

No necessary parts recorded.

No separable component distinguishes a blind flange from the genus; the defining trait is the absence of a bore (a quality/geometric property of the single plate body), not a part.
Process Participation SignatureAssinatura de Participação em Processo
InputsEntradas
—
OutputsSaídas
—
TransformationTransformação
no fluid participants -- the process sealed off a previously open pipe end so that no flow occurs through it
Unlike a generic flange (which conducts fluid across the joint it connects), a blind flange's entire purpose is to prevent flow, so it has no fluid input/output participants -- matching the 'containment' canonical term used for other passive-enclosure classes (vessels, tanks, flanges, seals per the canonical vocabulary's own description).
MetadataMetadados
COPI IDCOPI IDCOPI_0000745
IRIIRIhttps://www.inf.ufrgs.br/ontologies/copi/COPI_0000745
StatusStatusvalidated
Axiom modeModoequivalent
CreatedCriado2026-09-08
UpdatedAtualizado2026-09-10
LLM modelModelo LLMclaude-sonnet-5
VersionVersão2026-10-07
Quick factsDados rápidos
GenusGêneroFlange
Root classClasse raizMaterialArtifact
Axiom modeModoequivalent
FunctionFunçãoPipeEndClosureFunction
ProcessProcessoPipeEndClosureProcess
PartsPartes0
Source DefinitionsDefinições nas Fontes 3 sources
ISO 15926-4 BLIND FLANGE
Definition text withheld (copyrighted standard) — follow the source link above.Texto da definição omitido (norma protegida por direitos autorais) — acesse o link da fonte acima.
ONEPETRO_GLOSSARY Blind flange
Definition text withheld (copyrighted standard) — follow the source link above.Texto da definição omitido (norma protegida por direitos autorais) — acesse o link da fonte acima.
POSC Caesar Blind Flange
Definition text withheld (copyrighted standard) — follow the source link above.Texto da definição omitido (norma protegida por direitos autorais) — acesse o link da fonte acima.
Provenance tiersCamadas de proveniência secondary: none
?
How much independent secondary research backs this term — not how correct it is. "Full" means a non-primary source was quoted directly and covered several distinct aspects of the concept, not just its function. "Partial" means secondary research happened but covered less. "None" means only the primary definition was used. A "full" term can still contain an error, and a "none" term can still be entirely correct — this tracks whether the research step ran, not the result.Quanto de pesquisa secundária independente sustenta este termo — não o quão correto ele é. "Full" significa que uma fonte não-primária foi citada literalmente e cobriu vários aspectos distintos do conceito, não apenas sua função. "Partial" significa que houve pesquisa secundária, mas com cobertura menor. "None" significa que só a definição primária foi usada. Um termo "full" ainda pode conter um erro, e um termo "none" ainda pode estar totalmente correto — isso rastreia se a etapa de pesquisa ocorreu, não o resultado.
primarystandardverbatimiso15926[function]
A <BLIND FLANGE> is a <PIPE FLANGE> that is without a central opening and used to shut off a flanged pipe end.
primarystandardverbatimonepetro_glossary[function, application]
A flange plate without an opening, normally used as seal-off assurance over an unused line.
primarystandardverbatimposc_caesar[function]
A pipe flange that is without a central opening and used to shut off a flanged pipe end.

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