Standard Component Attributes

Model Reference Manual

Piping, Ducting and Cable Trays : Standard Component Attributes

This section describes the standard Component element attributes that provide their complete logical and physical descriptions. Although the user may set them directly, many of these attributes are automatically determined when using the Specification selection and pipe routing commands described elsewhere.

Two classes of standard attribute exist for Components:

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Those which ‘point’ to a Specification item that provides a fixed Catalogue description of the Component

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Those which cannot be part of the Catalogue description, as they are unique to each occurrence in the Design

The standard Specification attributes of a Component are:


SPREF	This points to a Specification Component that provides the complete Catalogue description of the current element.
LSTUBE	These point to a Specification Component that provides the complete Catalogue LSROD description of the Tube emerging from the current element Leave Point.
ISPEC	This points to an Insulation Specification. The Branch ‘TEMPERATURE’ attribute is automatically used to determine an insulation thickness from this Specification.
TSPEC	This points to a dummy Tracing Specification and is used by ISODRAFT to indicate trace heating requirements.
The remaining standard attributes are:
POSITION	The Component’s position in Zone coordinates (neither Branch nor Pipe have a POSITION, though Branch has head and tail positions (HPOS and TPOS).
ORIENTATION	The Component’s orientation in Zone coordinates (neither Branch nor Pipe have an ORIENTATION, though Branch has head and tail directions (HDIR and TDIR).
ARRIVE	The Catalogue p-point that is on the Arrive side of the Component.
LEAVE	The Catalogue p-point that is on the Leave side of the Component.
BUILT	Management information to indicate if the item has actually been built.
SHOP	(Shop fabrication flag.) Used by ISODRAFT to determine in which material list the item is to be shown.
ORIFLAG	(Logical orientation flag.) Set and used automatically to determine if the Component has been oriented.
POSIFLAG	(Logical position flag.) Set and used automatically to determine if the Component has been positioned.
The following attributes do not occur in all Components, but are sufficiently common to be considered as standard:
ANGLE	The (variable) angle of a Component.
HEIGHT	The (variable) height of a Component.
RADIUS	The (variable) radius of a Component.
LOFFLINE	(Logical Offline flag.) Indicates, for reporting purposes, whether the Component breaks the Tube either side of it.
CREF	(3-way Component Connection Reference.) Indicates the element that is connected to the third (neither Arrive nor Leave) p-point of the Current Element.
CRFA	(Multi-way Component Connection Reference.) Indicates the elements that are connected to the free (neither Arrive nor Leave) p-points of the Current Element.