exported
equivalent
safety relief valve
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Safetyreliefvalve
Generated on 2026-04-13
Natural Language Definition
EN
A safety relief valve is a valve that bears a safety relief function combining both safety protection and pressure relief capabilities.
PT-BR
Uma válvula de segurança e alívio é uma válvula que possui uma função de alívio de segurança que combina capacidades de proteção de segurança e alívio de pressão.
Formal Axioms
Semi-formal (Aristotelian)
Every safety relief valve is a valve that has the function of providing both safety protection and pressure relief.
First-Order Logic Theory
Loading…
▸ Stored override
∀x(SafetyReliefValve(x) ↔ (Valve(x) ∧ ∃f(SafetyReliefFunction(f) ∧ bearerOf(x,f))))
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: SafetyReliefValve
<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
:COPI_0000032 rdf:type owl:Class ; # SafetyReliefFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000034 # SafetyReliefProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000034 # SafetyReliefProcess
] ;
rdfs:label "safety relief function"@en ;
rdfs:label "função de alívio de segurança"@pt-br .
### Process type
:COPI_0000034 rdf:type owl:Class ; # SafetyReliefProcess
rdfs:subClassOf iof-core:PlannedProcess ;
rdfs:label "safety relief process"@en ;
rdfs:label "processo de alívio de segurança"@pt-br .
:COPI_0000034 # SafetyReliefProcess
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasInput ;
owl:someValuesFrom :COPI_0000037 # PortionOfFluid
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom :COPI_0000037 # PortionOfFluid
] .
### Equipment universal: SafetyReliefValve
:COPI_0000147 rdf:type owl:Class ; # SafetyReliefValve
owl:equivalentClass [
rdf:type owl:Class ;
owl:intersectionOf (
:COPI_0000077 # Valve
[
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000032 # SafetyReliefFunction
]
)
] ;
rdfs:label "safety relief valve"@en ;
rdfs:label "válvula de segurança e alívio"@pt-br ;
iof-av:naturalLanguageDefinition "A safety relief valve is a valve that bears a safety relief function combining both safety protection and pressure relief capabilities."@en ;
skos:definition "A safety relief valve is a valve that bears a safety relief function combining both safety protection and pressure relief capabilities."@en ;
iof-av:naturalLanguageDefinition "Uma válvula de segurança e alívio é uma válvula que possui uma função de alívio de segurança que combina capacidades de proteção de segurança e alívio de pressão."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every safety relief valve is a valve that has the function of providing both safety protection and pressure relief."@en ;
iof-av:firstOrderLogicAxiom "∀x(SafetyReliefValve(x) ↔ (Valve(x) ∧ ∃f(SafetyReliefFunction(f) ∧ bearerOf(x,f))))"@en ;
skos:definition "[ISO 15926-4] A <SAFETY RELIEF VALVE> is a <SAFETY VALVE> and a <RELIEF VALVE>"@en .
Axiomatization Decision Log
1
Identity-Giving Function
Function class
SafetyReliefFunction
⊑ DesignedFunction
Realized in
SafetyReliefProcess
⊑ PlannedProcess
The identity-giving function combines both safety valve function (protection against overpressure) and relief valve function (pressure relief). This dual function distinguishes it from valves that provide only one of these capabilities.
✓
Expert review — Accepted
2
Genus Determination
Valve
Safety relief valve is a specialized type of valve. While the ISO definition mentions it inherits from both SAFETY VALVE and RELIEF VALVE, the more fundamental genus is Valve since both safety valves and relief valves are valve subtypes. Valve is already enriched in our ontology.
✓
Expert review — Accepted
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
Safety relief valves require specialized internal mechanisms to perform dual functions of safety protection and pressure relief, beyond the basic valve components.
✓
Expert review — Accepted
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
PortionOfFluid
— pressurized fluid system
Outputs (O)
PortionOfFluid
— relieved fluid at safe pressure
Transformation (T)
pressure reduction through controlled discharge for safety protection
Takes pressurized fluid from a system and discharges it when pressure exceeds safe limits, combining both emergency safety function and pressure relief function.
✓
Expert review — Accepted
5
Axiom Mode Decision
Necessary + Sufficient
— modelled as a defined class
(≡, EquivalentClass). Automatic classification is
appropriate for this concept.
✓
Expert review — Accepted
Cross-Standard Observations
Only ISO 15926 provides a definition. The definition is brief but clearly establishes the dual nature of this valve type. Additional standards would help validate the functional characterization and identify any constructive variants.
Source Definitions
1 source
ISO 15926-4
SAFETY RELIEF VALVE ↗
Definition text withheld (copyrighted standard) — follow the source link above.
Metadata
| Ontology | COPI |
| Research group | INF-UFRGS-Ontologies |
| Funding | CNPq INF-UFRGS-ENERGIA |
| Project | OntoKG / Petrobras |
| ID | #66 |
| Cluster | safety relief valve |
| Status | exported |
| Axiom mode | equivalent |
| Created | 2026-04-13 |
| Updated | 2026-09-08 |
ISA 5.1-2022 P&ID Symbol
wikimedia/valve.svg
