#### 7.3.3.9 IfcPipeSegment

| Tronçon de tuyauterie
| Rohr

A pipe segment is used to typically join two sections of a piping network.

> HISTORY New entity in IFC4

## Plumbing System Design

Instance diagram

Identity

The Identity concept applies to this entity.

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  |  |  | R | R |  |  | R | R | R
Export |  |  |  |  |  |  | R | R |  |  | R | R | R

Object Typing

The Object Typing concept applies to this entity as shown in Table 92.

Type
IfcPipeSegmentType
Table 92 — IfcPipeSegment Object Typing

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  |  |  |  |  |  |  |  |  |
Export |  |  |  |  |  |  |  |  |  |  | R |  | R

Properties for Occurrences

The Properties for Occurrences concept applies to this entity as shown in Table 93.

PredefinedType | Name
--- | ---
| Pset_PipeConnectionFlanged
| Pset_PipeSegmentOccurrence
| Pset_PipeSegmentPHistory
| Pset_PipeSegmentTypeCommon
CULVERT | Pset_PipeSegmentTypeCulvert
GUTTER | Pset_PipeSegmentTypeGutter
Table 93 — IfcPipeSegment Properties for Occurrences

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  |  |  |  |  |  |  |  |  |
Export |  |  |  |  |  |  |  |  |  |  | R |  | R

Quantity Sets

The Quantity Sets concept applies to this entity as shown in Table 94.

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  |  |  |  |  |  |  |  |  |
Export |  |  |  |  |  |  |  |  |  |  |  |  | R

Material Profile Set Usage

The Material Profile Set Usage concept applies to this entity as shown in Table 95.

Name | Description
--- | ---
Casing | Material from which the casing is constructed.
Coating | The outer coating, if applicable.
Insulation | The insulating wrapping, if applicable.
Lining | The inner lining, if applicable.
Table 95 — IfcPipeSegment Material Profile Set Usage

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  |  |  |  |  | - |  |  |  |
Export |  |  |  |  |  |  |  | R | - |  | R | R | R

Ports

The Ports concept applies to this entity as shown in Table 96.

PredefinedType | Name | Flow | Type | Description
--- | --- | --- | --- | ---
| Inlet | SINK | NOTDEFINED | The flow inlet.
| Outlet | SOURCE | NOTDEFINED | The flow outlet.
Table 96 — IfcPipeSegment Ports

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  |  |  |  |  | - |  |  |  |
Export |  |  |  |  |  |  |  | R | - |  | R | R | R

Interference

The Interference concept applies to this entity.

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  |  |  |  |  |  |  |  |  |
Export |  |  |  |  |  |  |  | O |  |  | R | R | R

Axis Geometry

The Axis Geometry concept applies to this entity as shown in Table 97.

RepresentationType | Geometry | Description
--- | --- | ---
Curve3D | IfcPolyline | Polylines must be used for all pipe segment paths.
Table 97 — IfcPipeSegment Axis Geometry

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  |  |  |  |  |  |  |  |  |
Export |  |  |  |  |  |  |  | R |  |  | R | R | R

Body Geometry

The Body Geometry concept applies to this entity as shown in Table 98.

RepresentationType | Geometry | Description
--- | --- | ---
MappedRepresentation | IfcMappedItem | Mapped representations must be used for when a pipe type is defined.
SweptSolid | IfcExtrudedAreaSolid | Extruded solids may be used for when a pipe type is not defined.
Table 98 — IfcPipeSegment Body Geometry

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  |  |  |  |  |  |  |  |  |
Export |  |  |  |  |  |  |  |  |  |  | R |  | R

XSD Specification:

<xs:element name="IfcPipeSegment" type="ifc:IfcPipeSegment" substitutionGroup="ifc:IfcFlowSegment" nillable="true"/>
<xs:complexType name="IfcPipeSegment">
<xs:complexContent>
<xs:extension base="ifc:IfcFlowSegment"/>
</xs:complexContent>
</xs:complexType>

EXPRESS Specification:

ENTITY IfcPipeSegment

| SUBTYPE OF (IfcFlowSegment);

PredefinedType | : | OPTIONAL IfcStrippedOptional;

| WHERE

CorrectPredefinedType | : | NOT(EXISTS(PredefinedType)) OR (PredefinedType <> IfcPipeSegmentTypeEnum.USERDEFINED) OR ((PredefinedType = IfcPipeSegmentTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType));
CorrectTypeAssigned | : | (SIZEOF(IsTypedBy) = 0) OR ('IFCHVACDOMAIN.IFCPIPESEGMENTTYPE' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType));

END_ENTITY;

Formal Propositions:

CorrectPredefinedType | : | Either the PredefinedType attribute is unset (e.g. because an IfcPipeSegmentType is associated), or the inherited attribute ObjectType shall be provided, if the PredefinedType is set to USERDEFINED.
CorrectTypeAssigned | : | Either there is no pipe segment type object associated, i.e. the IsTypedBy inverse relationship is not provided, or the associated type object has to be of type IfcPipeSegmentType.

Inheritance Graph:

ENTITY IfcPipeSegment

| ENTITY IfcRoot

GlobalId | : | IfcGloballyUniqueId;
OwnerHistory | : | OPTIONAL IfcOwnerHistory;
Name | : | OPTIONAL IfcLabel;
Description | : | OPTIONAL IfcText;

| ENTITY IfcObjectDefinition

| INVERSE

HasAssignments | : | SET OF IfcRelAssigns FOR RelatedObjects;
Nests | : | SET [0:1] OF IfcRelNests FOR RelatedObjects;
IsNestedBy | : | SET OF IfcRelNests FOR RelatingObject;
HasContext | : | SET [0:1] OF IfcRelDeclares FOR RelatedDefinitions;
IsDecomposedBy | : | SET OF IfcRelAggregates FOR RelatingObject;
Decomposes | : | SET [0:1] OF IfcRelAggregates FOR RelatedObjects;
HasAssociations | : | SET OF IfcRelAssociates FOR RelatedObjects;

| ENTITY IfcObject

ObjectType | : | OPTIONAL IfcStrippedOptional;

| INVERSE

IsDeclaredBy | : | SET [0:1] OF IfcRelDefinesByObject FOR RelatedObjects;
Declares | : | SET OF IfcRelDefinesByObject FOR RelatingObject;
IsTypedBy | : | SET [0:1] OF IfcRelDefinesByType FOR RelatedObjects;
IsDefinedBy | : | SET OF IfcRelDefinesByProperties FOR RelatedObjects;

| ENTITY IfcProduct

ObjectPlacement | : | OPTIONAL IfcObjectPlacement;
Representation | : | OPTIONAL IfcProductRepresentation;

| INVERSE

ReferencedBy | : | SET OF IfcRelAssignsToProduct FOR RelatingProduct;

| ENTITY IfcElement

Tag | : | OPTIONAL IfcStrippedOptional;

| INVERSE

ConnectedTo | : | SET OF IfcRelConnectsElements FOR RelatingElement;
IsInterferedByElements | : | SET OF IfcRelInterferesElements FOR RelatedElement;
InterferesElements | : | SET OF IfcRelInterferesElements FOR RelatingElement;
HasOpenings | : | SET OF IfcRelVoidsElement FOR RelatingBuildingElement;
ProvidesBoundaries | : | SET OF IfcRelSpaceBoundary FOR RelatedBuildingElement;
ConnectedFrom | : | SET OF IfcRelConnectsElements FOR RelatedElement;
ContainedInStructure | : | SET [0:1] OF IfcRelContainedInSpatialStructure FOR RelatedElements;

| ENTITY IfcDistributionElement

| INVERSE

HasPorts | : | SET OF IfcRelConnectsPortToElement FOR RelatedElement;

| ENTITY IfcDistributionFlowElement

| INVERSE

| ENTITY IfcFlowSegment

| ENTITY IfcPipeSegment

PredefinedType | : | OPTIONAL IfcStrippedOptional;

END_ENTITY;

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