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AVEVA™ Unified Engineering

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Standard Component Attributes

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  • Last UpdatedFeb 19, 2025
  • 2 minute read

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:

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

  • Those which cannot be part of the Catalog 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 Catalog description of the current element.

LSTUBE

These point to a Specification Component that provides the complete Catalog 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 Catalog p-point that is on the Arrive side of the Component.

LEAVE

The Catalog 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.

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