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Hull and Outfitting

Isometric Drawing

  • Last UpdatedJan 08, 2026
  • 2 minute read

This chapter describes how Isodraft outputs isometric drawings, including the default details Isodraft uses and how to customize them.

Summary of Commands

The following commands were described in this chapter:

ANGLEACCURACY

Allows you to specify the degree of accuracy for the reporting of angles.

ATTANAME

Specifies the ways in which support ATTAs are identified.

AXES

Specifies the coordinate system to be used for showing 3D positions on drawings.

BENDRADIUS

Specifies when radii of pulled bends will be shown and in what units.

CHARSIZE

Specifies the character size to be used for annotating text on drawings.

CLLENGTHFILE

Specifies that a pipe centreline length summary, with or without an insulation centreline summary, should be output.

CONTINUATIONSYMBOLS

Plots continuation symbols where pipes are connected to nozzles on Plant equipment.

CONTNOTES

Specifies continuation notes at the end points on drawings for when the connection goes to another isometric.

COORDINATES

Specifies the drawing locations at which spatial coordinates are shown.

DIMDIST

Specifies the ‘standout’ distance, between dimensioning lines and pipe/ component centrelines.

DIMENSIONS

Specifies dimensioning style.

ELEVATION

Specifies whether or not elevation coordinates are to be shown.

FALLINGLINES

Defines the maximum rate of fall allowed in a pipeline before it is shown as a skew.

FALLSKEWS

Controls how dimensioning boxes for skewed/falling pipelines are shown.

FLOWARROWS

Allows flow arrows to be shown on isometric plots.

INSULATIONCONTROL

Specifies whether or not insulation is to be plotted.

LEGLENGTH

Allows you to specify the plotted leg length of elbows, tees and crosses.

MESSAGEACCURACY

Controls how arrowed messages on the isometric are positioned.

OUTCOM

Defines the style in which attributes are shown on the isometric drawing area.

OVERALLSKEWS

Allows you to specify whether triangular skewboxes are shown as overall skewboxes across branches, or as separate skewboxes between branch connections.

PICTURESCALE

Allows you to set the scale of the isometric drawing.

REFDIMENSIONS

Switches the display of reference dimensions on and off.

REPEATABILITY

Creates split ATTAs at automatically generated split points.

SKEWBOX

Controls how skewed piping is shown.

SPECBREAK

Specifies the level at which a change of pipeline specification is noted, and which changes are shown.

SPLIT

Controls the number of drawing sheets used when a pipeline is split over more than one sheet.

SUPPORTS

Defines whether support positions are shown and are dimensioned as overall or string dimensions.

TAGGING

Allows you to identify individual components on the isometric plot by means of name tags.

TOLERANCE

Specifies the maximum misalignment between components regarded as having the same axis.

TRACINGCONTROL

Specifies whether or not tracing is to be plotted.

TRUNCATE

Stops rounding remainders of dimensions being added to the next dimension.

TUBESPLITS

Controls how splits in tube are placed.

UNITS

Specifies units of measurement to be used for Isodraft’s output.

WELDID

Allows you to identify individual welds on the isometric by name.

WELDNUMBERS

Controls numbering the welds on an isometric.

WELDTYPE

Controls which types of end connection are shown on drawings.

ZEROLENGTHSKEWS

Allows you to connect a vertical Branch to a falling line.

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