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validated necessary COPI_0000765
Pipe Reducer Concentric
IRI: https://www.inf.ufrgs.br/ontologies/copi/COPI_0000765
Generated onGerado em 2026-09-08
Natural Language DefinitionDefinição em Linguagem Natural
EN
A concentric reducer is a pipe reducer whose larger and smaller pipe ends share a common, coaxial centerline, giving it a symmetric cone shape.
PT-BR
Um reductor concentrico e um redutor de tubulacao cujas extremidades maior e menor compartilham uma linha de centro coaxial comum, conferindo-lhe formato conico simetrico.
Formal AxiomsAxiomas Formais
Semi-formal (Aristotelian)Semi-formal (Aristotélico)
Every concentric reducer is a pipe reducer that bears a fluid conduction function and has a coaxial centerline quality, distinguishing it from an eccentric reducer's offset centerline.
First-Order Logic TheoryTeoria em Lógica de Primeira Ordem
[Necessary condition]∀x (PipeReducerConcentric(x) → PipeReducer(x) ∧ ∃f (FluidConductionFunction(f) ∧ bearerOf(x,f))) — Steps 1–3: genus + identity-giving function [Function axiom: FluidConductionFunction]∀f (FluidConductionFunction(f) → ∀p (realizedIn(f,p) → FluidConductionProcess(p)) ∧ ∃p (FluidConductionProcess(p) ∧ realizedIn(f,p))) — Step 1: ∀ preserves type-type identity; ∃ rules out vacuous functions never realised [Structural differentia (necessary only)]∀x (PipeReducerConcentric(x) → ∃hasQuality.CoaxialCenterline) — Step 3: structural property — necessary condition, not sufficient (OWA prevents ≡) [Process participation signature]∀x ∀f ((PipeReducerConcentric(x) ∧ FluidConductionFunction(f) ∧ bearerOf(x,f)) → ∃m (PortionOfFluid(m) ∧ participatesIn(m,f)) ∧ ∃e (PortionOfFluid(e) ∧ participatesIn(e,f)) ∧ processType(f,FluidTransport)) — 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: PipeReducerConcentric <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 :FluidConductionFunction rdf:type owl:Class ; rdfs:subClassOf iof-core:DesignedFunction ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:allValuesFrom :FluidConductionProcess ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:someValuesFrom :FluidConductionProcess ] ; rdfs:label "fluid conduction function"@en ; rdfs:label "função de condução de fluido"@pt-br ; iof-av:naturalLanguageDefinition "A DesignedFunction that is realized in a FluidConductionProcess and that consists in conveying a fluid from one point to another through an enclosed conduit."@en ; skos:definition "A DesignedFunction that is realized in a FluidConductionProcess and that consists in conveying a fluid from one point to another through an enclosed conduit."@en . ### Process type :FluidConductionProcess rdf:type owl:Class ; rdfs:subClassOf :MomentumTransfer ; rdfs:label "fluid conduction process"@en ; rdfs:label "processo de condução de fluido"@pt-br ; iof-av:naturalLanguageDefinition "A PlannedProcess in which a fluid is conveyed through an enclosed conduit, changing cross-sectional area as needed between differently-sized pipe ends."@en ; skos:definition "A PlannedProcess in which a fluid is conveyed through an enclosed conduit, changing cross-sectional area as needed between differently-sized pipe ends."@en . :MomentumTransfer rdf:type owl:Class . :FluidConductionProcess rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasInput ; owl:someValuesFrom :PortionOfFluid ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasSpecifiedOutput ; owl:someValuesFrom :PortionOfFluid ] . ### Equipment universal: PipeReducerConcentric :PipeReducerConcentric rdf:type owl:Class ; rdfs:subClassOf :PipeReducer ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart) owl:someValuesFrom :FluidConductionFunction ] ; rdfs:label "pipe reducer concentric"@en ; iof-av:naturalLanguageDefinition "A concentric reducer is a pipe reducer whose larger and smaller pipe ends share a common, coaxial centerline, giving it a symmetric cone shape."@en ; skos:definition "A concentric reducer is a pipe reducer whose larger and smaller pipe ends share a common, coaxial centerline, giving it a symmetric cone shape."@en ; iof-av:naturalLanguageDefinition "Um reductor concentrico e um redutor de tubulacao cujas extremidades maior e menor compartilham uma linha de centro coaxial comum, conferindo-lhe formato conico simetrico."@pt-br ; iof-av:semiFormalNaturalLanguageAxiom "Every concentric reducer is a pipe reducer that bears a fluid conduction function and has a coaxial centerline quality, distinguishing it from an eccentric reducer's offset centerline."@en ; iof-av:firstOrderLogicAxiom "∀x (ConcentricReducer(x) → PipeReducer(x) ∧ ∃f (FluidConductionFunction(f) ∧ bearerOf(x,f)) ∧ ∃q (CoaxialCenterline(q) ∧ hasQuality(x,q)))"@en ; iof-av:isPrimitive "true"^^xsd:boolean ; iof-av:primitiveRationale "Constructive subtype reusing genus and function unchanged: sufficiency is not asserted so as not to preclude expert review of edge cases (e.g. slightly asymmetric fittings marketed as 'concentric')."@en ;
Axiomatization Decision LogRegistro de Decisões
1 Identity-Giving FunctionFunção Identitária
Function class
FluidConductionFunction ⊑ DesignedFunction
Realized in
FluidConductionProcess ⊑ MomentumTransfer
Reused verbatim from the already-enriched genus 'pipe reducer' per the constructive-type rule.
2 Genus DeterminationDeterminação do Gênero
PipeReducerbfo:Object (BFO_0000030)
'pipe reducer' (already enriched, genus=Pipe, differentia references InletEnd/OutletEnd/DifferentNominalPipeSizes) is the exact genus proximum: a concentric reducer is a pipe reducer distinguished only by the symmetry of its taper.
3 Differentia SpecificaDiferença Específica
∃hasQuality.CoaxialCenterline

The centerlines of the larger and smaller pipe ends are coaxial (aligned), giving the reducer a symmetric, cone-shaped taper -- as opposed to an eccentric reducer, whose centerlines are offset with one flat side.

Directly grounded verbatim: 'A PIPE REDUCER CONCENTRIC is a PIPE REDUCER where the center lines of the two ends are in line.' Modeled as a quality (following the 'riser' precedent, ∃hasQuality.VerticalOrientation) rather than a component part, since it is a geometric property of the single reducer body, not a separable/addable part.
4 Necessary PartsPartes Necessárias

No necessary parts recorded.

No separable component distinguishes a concentric reducer from the genus; the distinguishing trait is a geometric quality of the body itself (see Step 3).
Process Participation SignatureAssinatura de Participação em Processo
InputsEntradas
{'type': 'PortionOfFluid', 'count': 1, 'constraints': 'any phase, at the larger pipe end'}
OutputsSaídas
{'type': 'PortionOfFluid', 'count': 1, 'constraints': 'same fluid, at the smaller pipe end, symmetric velocity profile due to coaxial taper'}
TransformationTransformação
fluid conducted through a symmetric conical taper between two differently-sized, coaxial pipe ends
Same passive-transport signature as the genus PipeReducer; the coaxial symmetry affects velocity-profile uniformity but not the ontological transformation category.
MetadataMetadados
COPI IDCOPI IDCOPI_0000765
IRIIRIhttps://www.inf.ufrgs.br/ontologies/copi/COPI_0000765
StatusStatusvalidated
Axiom modeModonecessary
CreatedCriado2026-09-08
UpdatedAtualizado2026-09-10
LLM modelModelo LLMclaude-sonnet-5
VersionVersão2026-10-07
Quick factsDados rápidos
GenusGêneroPipeReducer
Root classClasse raizMaterialArtifact
Axiom modeModonecessary
FunctionFunçãoFluidConductionFunction
ProcessProcessoFluidConductionProcess
PartsPartes0
Source DefinitionsDefinições nas Fontes 1 source
ISO 15926-4 PIPE REDUCER CONCENTRIC
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[structure, profile]
A <PIPE REDUCER CONCENTRIC> is a <PIPE REDUCER> where the center lines of the two ends are in line.
tertiarymanufacturer_pageverbatimamplealloys.com[profile, application]
A concentric reducer is a type of pipe fitting used to connect two pipes of different diameters in a piping system. It maintains a centerline axis between the two ends, meaning both ends of the reducer are aligned along the same centerline.
tertiarymanufacturer_pageverbatimsunhyings.com[profile, application]
A concentric reducer is symmetrical (cone-shaped), aligning the centerlines of both the larger and smaller pipes, which makes it ideal for vertical flow applications.

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