ISODRAFT
User Guide
Isometric Drawing : Dimensioning
String dimensions are measured between the following points:
|
•
|
Composite dimensioning ignores dimensions which the fabricator has no control over, particularly the sizes of individual components. Components which are directly connected to each other are therefore dimensioned as though they constitute a single composite item.
Overall dimensions indicate the lengths of the following sections of a pipeline:
The user can specify that overall dimensioning is to critical components. This can be used when the exact lengths of all components are not known at the time of design, for example, if the purchase of fittings has been delegated to a local fabricator. Critical dimensions are between points on assemblies of connected components. The points are chosen according to the first rule satisfied from the following list:
|
Figure 9:2.
|
