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Model Flow Fitting (FP)
Added by Brendan McFarlane, last edited by Brendan McFarlane on Sep 15, 2006  (view change)
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Model Flow Fitting (FP)

Provides the information concerning flow fittings. A flow fitting is an element of a distribution system at which there is a change in the flow characteristics of the medium being distributed. A flow fitting may have one or more entry ports and one or more exit ports.

All flow fittings are types of flow element (IfcDistributionFlowElement) within the IFC model.

The types of fitting contained within IFC include:

Service IfcFlowSegmentType subtype
Cable transport IfcCableCarrierFittingType
Communications systems IfcCableFittingType
Controls systems IfcCableFittingType
Electrical systems IfcCableFittingType
Oil/gas systems IfcPipeFittingType
Water systems IfcPipeFittingType
Ventilation systems IfcDuctFittingType

The information presented in this functional part enables:

  • extension of a basic building model through the provision of size and location information
  • provision of weight information for the structural engineer
  • provision of performance information for analysis

This information includes:

  • Specification of fitting name and description if required
  • Shape representations of the fitting
  • Identification of the type to which a fitting occurrence conforms
  • The material from which the fitting is constructed

In addition, performance information for occurrences of fittings of particular types as indicated in the list above may be provided. Specification of the performance information that may be required is given in the tables below.

Note that the particular type of fitting to be used, and that therefore defines the performance information requirement, can be set as a parameter in the exchange requirement by:

fp_model_flow_fitting \[type, {predefined_type}\]

For instance, for a pipe fitting, reference to the relevant items within this functional part from the exchange requirement would be by specifying:

fp_model_flow_fitting \[Pipe, Bend\]

Results

Model of flow fitting occurrence(s) including shape representation and other basic information

Description Entity/Pset/Functional Part MAN REC OPT
Model the fitting type        
Select the type of fitting to be modeled The following are the selections available within the model. Each of these is a functional subtype of IfcFlowFittingType (as shown in the Overview list). Further reference generally to these types is shown below as Ifc<Functional>Type.
  • IfcCableCarrierFittingType
  • IfcDuctFittingType
  • IfcPipeFittingType
   
Set the specific type of the fitting being used Ifc<Functional>Type.PredefinedType    
If the value of the predefined type identifier is set to USERDEFINED, then establish the value that the user wishes to set. IfcElementType.ElementType    
Generally, the shape representation of equipment will be defined as a representation map which is assigned to the type. This is so that the shape representation for the equipment type is defined once but can be used by multiple occurrences of the same type.
Provision of a representation map is normally optional within the model but should be asserted for building model exchange.
fp_map_representation    
NOTE
Equipment can also be directly modeled as occurrences without having to specify a type. However, it is not recommended that this approach is used.
       
         
Assert general attributes for the type        
Set the global unique identifier Ifc<Functional>Type.GlobalId -> IfcGloballyUniqueId    
Assert the owner history of the fitting type Ifc<Functional>Type.OwnerHistory -> fp_apply_owner_history    
Specify a name of the fitting type Ifc<Functional>Type.Name -> IfcLabel    
Specify a description of the fitting type Ifc<Functional>Type.Description -> IfcText    
         
Model the fitting occurrence        
Establish the placement of the origin point of the fitting occurrence Ifc<Occurrence>.ObjectPlacement -> fp_place_object    
Define the shape representation for the fitting occurrence
Note that an equipment occurrence may have several representations. These are contained in the representation map which is represented as a mapped item for the occurrence.
Ifc<Occurrence>.Representation -> fp_represent_product    
         
Establish Properties        
For each fitting type, the value of type properties within property sets may be defined. Information on relevant property sets for the various types is given in the extension tables below. fp_property    
For each fitting occurrence, the value of occurrence properties within property sets may be defined. Information on relevant property sets for the various occurrences is given in the extension tables below. fp_property    
         
Define type and occurrence        
Define the type of fitting to which the fitting occurrence conforms
Refer to the list given in the Overview section for further information.
fp_define_by_type    
Define the property set for the fitting occurrence fp_define_by_properties    
         
Assert general attributes for the occurrence        
Set the global unique identifier Ifc<Occurrence>.GlobalId -> IfcGloballyUniqueId    
Assert the owner history of the fitting occurrence Ifc<Occurrence>.OwnerHistory -> fp_apply_owner_history    
Set a name to the fitting occurrence Ifc<Occurrence>.Name -> IfcLabel    
Provide a description of the fitting occurrence Ifc<Occurrence>.Description -> IfcText    
         
Extend occurrence information        
Define the material from which the fitting is constructed fp_associate_material    
Classify the fitting occurrence according to the selected classification approach fp_associate_classification    
Description Entity/Pset/Functional Part MAN REC OPT
For duct fittings
Set the following values within the property set Pset_DuctFittingTypeCommon
IfcDuctFittingType (ALL TYPES)      
Subtype of fitting (i.e., 5-gore, pleated, stamped, etc.) Pset_DuctFittingTypeCommon.Subtype -> IfcText    
Material from which the duct fitting is constructed.
Note that this property may be used if the material is not associated with that segment through the functional part fp_associates_material.
Pset_DuctFittingTypeCommon.Material -> IfcMaterial    
The thickness of the duct fitting material
Only applicable if the material is not separately asserted.
Pset_DuctFittingTypeCommon.MaterialThickness -> IfcPositiveLengthMeasure    
Pressure classification as defined by the authority having jurisdiction (e.g., SMACNA, etc.). Pset_DuctFittingTypeCommon.PressureClass -> IfcPressureMeasure    
Weight per unit length.
Only applicable if the weight is not separately defined through fp_apply_quantity[weight]
Pset_DuctFittingTypeCommon.UnitWeight -> IfcMassPerLengthMeasure    
Allowable maximum and minimum working pressure (relative to ambient pressure). Pset_DuctFittingTypeCommon.PressureRange -> IfcPressureMeasure    
Allowable maximum and minimum temperature. Pset_DuctFittingTypeCommon.TemperatureRange -> IfcThermodynamicTemperatureMeasure    
The nominal width or diameter (if circular) of a duct fitting or, in the case of a circular cross section, the diameter. Pset_DuctFittingTypeCommon.NominalDiameterOrWidth -> IfcPositiveLengthMeasure    
The nominal height of the fitting. Pset_DuctFittingTypeCommonNominalHeight -> IfcPositiveLengthMeasure    
The end-style treatment of the duct fitting manufactured.
If the list contains only one value, then this end-style applies to all ports. For more than one value in the list, the end-style value applies to the port that corresponds to the list index.
The following suggested items should be utilized whenever possible for correlation with port enumerations:
  • ANGLE
  • BEADEDSLEEVE
  • BRAZED
  • COMPRESSION
  • CRIMP
  • DRAWBAND
  • DRIVESLIP
  • FLANGED
  • OUTSIDESLEEVE
  • SLIPON
  • SOLDERED
  • SSLIP
  • STANDINGSEAM
  • SWEDGE
  • WELDED
  • NONE
Pset_DuctFittingTypeCommon.EndStyleTreatment -> IfcText    
Description Entity/Pset/Functional Part MAN REC OPT
For pipe fittings
Set the following values within the property set Pset_PipeFittingTypeCommon
IfcPipeFittingType (ALL TYPES)      
Subtype of fitting
The following suggested items should be utilized whenever possible for consistency across applications:
  • BEND_15DEGREE
    Changes the direction of flow through 15 degrees.
  • BEND_22_5DEGREE
    Changes the direction of flow through 22.5 degrees.
  • BEND_25DEGREE
    Changes the direction of flow through 25 degrees.
  • BEND_30DEGREE
    Changes the direction of flow through 30 degrees.
  • BEND_45DEGREE
    Changes the direction of flow through 45 degrees.
  • BEND_67DEGREE
    Changes the direction of flow through 67 degrees.
  • BEND_76DEGREE
    Changes the direction of flow through 76 degrees.
  • BEND_87_5DEGREE
    Changes the direction of flow through 87.5 degrees.
  • BEND_90DEGREE
    Changes the direction of flow through 90 degrees.
  • BEND_135DEGREE
    Changes the direction of flow through 135 degrees.
  • BEND_180DEGREE
    Changes the direction of flow through 180 degrees.
  • JUNCTION_CROSS_SQUARE
    Branch fitting with two opposing branches that are swept in the direction of the main flow.
  • JUNCTION_CROSS_SWEEP
    Branch fitting with two swept opposing branches at right angles to the main flow.
  • JUNCTION_TEE_SQUARE
    Branch fitting in which the branch is at an angle of 90 degrees to the main pipe.
  • JUNCTION_TEE_SWEEP
    Branch fitting in which the branch is curved through 90 degrees to join a main pipe tangentially.
  • JUNCTION_TEE_TWINBEND
    Symmetrical pipe fitting in which two short radius bends curve through 90 degree to form a single pipe.
  • JUNCTION_TEE_TWINELBOW
    Symmetrical pipe fitting in which two elbows curve through 90 degree to form a single pipe.
  • JUNCTION_TEE_Y
    Branch fitting in the shape of a letter Y.
  • OBSTRUCTION_CAP
    Device fixed onto the end of a pipe or pipe fitting to close it.
  • OBSTRUCTION_PLUG
    Device fixed into the end of a pipe or pipe fitting to close it.
Pset_PipeFittingTypeCommon.Subtype -> IfcText    
Material from which the pipe fitting is constructed.
Note that this property may be used if the material is not associated with that fitting through the functional part fp_associates_material.
Pset_PipeFittingTypeCommon.Material -> IfcMaterial    
The working pressure of the medium in the pipe Pset_PipeFittingTypeCommon.PressureClass -> IfcPressureMeasure    
Weight per unit length.
Only applicable if the weight is not separately defined through fp_apply_quantity[weight]
Pset_PipeFittingTypeCommon.UnitWeight -> IfcMassPerLengthMeasure    
Allowable maximum and minimum working pressure (relative to ambient pressure). Pset_PipeFittingTypeCommon.PressureRange -> IfcPressureMeasure    
Allowable maximum and minimum temperature. Pset_PipeFittingTypeCommon.TemperatureRange Pset_DuctFittingTypeCommon.TemperatureRange -> IfcThermodynamicTemperatureMeasure    
The nominal diameter of the pipe fitting.
If the list contains only one value, then this nominal diameter applies to all ports. For more than value in the list, the nominal diameter value applies to the port that corresponds to the list index
Pset_PipeFittingTypeCommon.NominalDiameter -> IfcPositiveLengthMeasure    
The actual inner diameter of the pipe.
Refer to NominalDiameter for comments about interpretation of multiple items in the list.
Pset_PipeFittingTypeCommon.InnerDiameter -> IfcPositiveLengthMeasure    
The actual outer diameter of the pipe.
Refer to NominalDiameter for comments about interpretation of multiple items in the list.
Pset_PipeFittingTypeCommon.OuterDiameter -> IfcPositiveLengthMeasure    
The end-style treatment of the pipe fitting manufactured.
If the list contains only one value, then this end-style applies to all ports. For more than one value in the list, the end-style value applies to the port that corresponds to the list index.
The following suggested items should be utilized whenever possible for correlation with port enumerations:
  • FLANGED
  • GROOVED
  • THREADED
  • NONE
Pset_PipeFittingTypeCommon.EndStyleTreatment -> IfcText    
The factor that determines the pressure loss due to friction through the fitting. Pset_PipeFittingTypeCommon.FittingLossFactor -> IfcReal    
Description Entity/Pset/Functional Part MAN REC OPT
For cable carrier fittings
Cable carriers are conduit, ladder, tray and trunking and have properties defined as below.
No specific property sets are developed for cable carrier fittings at this stage. All properties of such fittings should be derived from the cable carrier segments to which they are connected.
       

IFC Entities Required

  • IfcCableCarrierFittingType
  • IfcCableFittingType
  • IfcDistributionElement
  • IfcDistributionElementType
  • IfcDistributionFlowElement
  • IfcDistributionFlowElementType
  • IfcDuctFittingType
  • IfcElement
  • IfcElementType
  • IfcFlowSegment
  • IfcFlowSegmentType
  • IfcObject
  • IfcPipeFittingType
  • IfcProduct
  • IfcPropertyDefinition
  • IfcPropertySetDefinition
  • IfcPropertySet
  • IfcRoot
  • IfcTypeObject
  • IfcTypeProduct

IFC Datatypes Required

  • IfcGloballyUniqueId
  • IfcIdentifier
  • IfcLabel
  • IfcText
  • IfcCableCarrierFittingTypeEnum
  • IfcCableFittingTypeEnum
  • IfcDuctFittingTypeEnum
  • IfcPipeFittingTypeEnum

IFC Functions Required

  • -

IFC Property Sets Required

  • Pset_DuctFittingTypeCommon
  • Pset_PipeFittingTypeCommon

IDM Functional Parts Required

  • fp_apply_owner_history
  • fp_assigns_to_group
  • fp_connects_ports
  • fp_define_by_properties
  • fp_define_by_type
  • fp_map_representation
  • fp_place_object
  • fp_property
  • fp_represent_product

EXPRESS-G

EXPRESS Schema

SCHEMA FP_MODEL_FLOW_FITTING;

  TYPE IfcGloballyUniqueId = STRING (22) FIXED;
  END_TYPE;

  TYPE IfcIdentifier = STRING;
  END_TYPE;

  TYPE IfcLabel = STRING;
  END_TYPE;

  TYPE IfcText = STRING;
  END_TYPE;

  TYPE IfcCableCarrierFittingTypeEnum = ENUMERATION OF
    (BEND,
     CROSS,
     REDUCER,
     TEE,
     USERDEFINED,
     NOTDEFINED);
  END_TYPE;

  TYPE IfcDuctFittingTypeEnum = ENUMERATION OF
    (BEND,
     CONNECTOR,
     ENTRY,
     EXIT,
     JUNCTION,
     OBSTRUCTION,
     TRANSITION,
     USERDEFINED,
     NOTDEFINED);
  END_TYPE;

  TYPE IfcJunctionBoxTypeEnum = ENUMERATION OF
    (USERDEFINED,
     NOTDEFINED);
  END_TYPE;

  TYPE IfcPipeFittingTypeEnum = ENUMERATION OF
    (BEND,
     CONNECTOR,
     ENTRY,
     EXIT,
     JUNCTION,
     OBSTRUCTION,
     TRANSITION,
     USERDEFINED,
     NOTDEFINED);
  END_TYPE;

  ENTITY IfcProduct
    ABSTRACT SUPERTYPE
    SUBTYPE OF(IfcObject);
      ObjectPlacement : OPTIONAL fp_place_object;
      Representation  : OPTIONAL fp_represent_product;
    WHERE
      WR1 : (EXISTS(Representation) AND EXISTS(ObjectPlacement))
            OR (EXISTS(Representation) AND 
            (NOT('IFC2X2_FINAL.IFCPRODUCTDEFINITIONSHAPE' IN TYPEOF(Representation))))
            OR (NOT(EXISTS(Representation)));
  END_ENTITY;

  ENTITY IfcObject
    ABSTRACT SUPERTYPE
    SUBTYPE OF(IfcRoot);
      ObjectType : OPTIONAL IfcLabel;
    WHERE
      WR1 : SIZEOF(QUERY(temp <* IsDefinedBy | 'IFC2X2_FINAL.IFCRELDEFINESBYTYPE' IN TYPEOF(temp))) <= 1;
  END_ENTITY;

  ENTITY IfcRoot
    ABSTRACT SUPERTYPE OF (ONEOF(IfcObject, IfcPropertyDefinition));
      GlobalId     : IfcGloballyUniqueId;
      Name         : OPTIONAL IfcLabel;
      Description  : OPTIONAL IfcText;
      OwnerHistory : fp_apply_owner_history;
    UNIQUE
      UR1 : GlobalId;
  END_ENTITY;

  ENTITY IfcPropertyDefinition
    ABSTRACT SUPERTYPE OF (ONEOF(IfcPropertySetDefinition, IfcTypeObject))
    SUBTYPE OF(IfcRoot);
  END_ENTITY;

  ENTITY IfcPropertySetDefinition
    ABSTRACT SUPERTYPE
    SUBTYPE OF(IfcPropertyDefinition);
    INVERSE
      DefinesType : SET [0:1] OF IfcTypeObject FOR HasPropertySets;
  END_ENTITY;

  ENTITY IfcPropertySet
    SUBTYPE OF(IfcPropertySetDefinition);
      HasProperties : SET [1:?] OF fp_property;
    WHERE
      WR31 : EXISTS(SELF\IfcRoot.Name);
      WR32 : IfcUniquePropertyName(HasProperties);
  END_ENTITY;

  ENTITY fp_property;
  END_ENTITY;

  ENTITY IfcTypeObject
    SUBTYPE OF(IfcPropertyDefinition);
      ApplicableOccurrence : OPTIONAL IfcLabel;
      HasPropertySets      : OPTIONAL LIST [1:?] OF IfcPropertySetDefinition;
    WHERE
      WR1 : EXISTS(SELF\IfcRoot.Name);
  END_ENTITY;

  ENTITY IfcTypeProduct
    SUBTYPE OF(IfcTypeObject);
      Tag                : OPTIONAL IfcLabel;
      RepresentationMaps : SET [1:?] OF fp_map_representation;
    WHERE
      WR41 : NOT(EXISTS(SELF\IfcTypeObject.ObjectTypeOf[1])) OR
             (SIZEOF(QUERY(temp <* SELF\IfcTypeObject.ObjectTypeOf[1].RelatedObjects |
             NOT('IFC2X2_FINAL.IFCPRODUCT' IN TYPEOF(temp)))
             ) = 0);
  END_ENTITY;

  ENTITY IfcElementType
    ABSTRACT SUPERTYPE
    SUBTYPE OF(IfcTypeProduct);
      ElementType : OPTIONAL IfcLabel;
  END_ENTITY;

  ENTITY IfcDistributionElementType
    ABSTRACT SUPERTYPE
    SUBTYPE OF(IfcElementType);
  END_ENTITY;

  ENTITY IfcDistributionFlowElementType
    ABSTRACT SUPERTYPE
    SUBTYPE OF(IfcDistributionElementType);
  END_ENTITY;

  ENTITY IfcFlowFittingType
    ABSTRACT SUPERTYPE OF (ONEOF(IfcCableCarrierFittingType, IfcDuctFittingType, IfcJunctionBoxType, IfcPipeFittingType))
    SUBTYPE OF(IfcDistributionFlowElementType);
  END_ENTITY;

  ENTITY IfcCableCarrierFittingType
    SUBTYPE OF(IfcFlowFittingType);
      PredefinedType : IfcCableCarrierFittingTypeEnum;
    WHERE
      WR1 : (PredefinedType <> IfcCableCarrierFittingTypeEnum.USERDEFINED) OR
            ((PredefinedType = IfcCableCarrierFittingTypeEnum.USERDEFINED) AND EXISTS(SELF\IfcElementType.ElementType));
  END_ENTITY;

  ENTITY IfcDuctFittingType
    SUBTYPE OF(IfcFlowFittingType);
      PredefinedType : IfcDuctFittingTypeEnum;
    WHERE
      WR2 : (PredefinedType <> IfcDuctFittingTypeEnum.USERDEFINED) OR
            ((PredefinedType = IfcDuctFittingTypeEnum.USERDEFINED) AND EXISTS(SELF\IfcObject.ObjectType));
  END_ENTITY;

  ENTITY IfcJunctionBoxType
    SUBTYPE OF(IfcFlowFittingType);
      PredefinedType : IfcJunctionBoxTypeEnum;
  END_ENTITY;

  ENTITY IfcPipeFittingType
    SUBTYPE OF(IfcFlowFittingType);
      PredefinedType : IfcPipeFittingTypeEnum;
    WHERE
      WR1 : (PredefinedType <> IfcPipeFittingTypeEnum.USERDEFINED) OR
            ((PredefinedType = IfcPipeFittingTypeEnum.USERDEFINED) AND EXISTS(SELF\IfcObject.ObjectType));
  END_ENTITY;

  ENTITY fp_map_representation;
  END_ENTITY;

  ENTITY fp_apply_owner_history;
  END_ENTITY;

  ENTITY IfcElement
    ABSTRACT SUPERTYPE
    SUBTYPE OF(IfcProduct);
      Tag : OPTIONAL IfcIdentifier;
  END_ENTITY;

  ENTITY IfcDistributionElement
    SUBTYPE OF(IfcElement);
  END_ENTITY;

  ENTITY IfcDistributionFlowElement
    SUBTYPE OF(IfcDistributionElement);
  END_ENTITY;

  ENTITY IfcFlowFitting
    SUBTYPE OF(IfcDistributionFlowElement);
  END_ENTITY;

  ENTITY fp_place_object;
  END_ENTITY;

  ENTITY fp_represent_product;
  END_ENTITY;

  ENTITY fp_define_by_type;
  END_ENTITY;

  ENTITY fp_define_by_properties;
  END_ENTITY;

  ENTITY fp_connect_ports;
  END_ENTITY;

  ENTITY fp_assigns_to_group;
  END_ENTITY;

END_SCHEMA;

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