Conventions to be used in preparation of detail sketches - Intergraph Smart Isometrics - Help - Hexagon PPM

Intergraph Smart Isometrics Help

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English
Product
Intergraph Smart Isometrics
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SmartPlant Foundation / SDx Version
10
I-Configure Version
6.0(2016)
Isogen Version
13.0(2016)
Smart Isometrics Version
2019 R1 (7.1)
Spoolgen Version
2019 R1 (9.1)

View directions for sections look along a positive horizontal direction, that is, toward N or E. The Y-axis for a horizontal section is always UP. The X-axis is orthogonal to UP, and the positive pipe direction is E for a N/S header and S for an E/W header.

Because it is much more conventional to look DOWN on sections through vertical pipe, the view direction for these sections is reversed, or along the negative direction. This has the advantage that rotation will be clockwise and not counter-clockwise. The Y-axis for a vertical section is E, and the X-axis is S.

The sketch below is a section through the header pipe showing the angle of rotation measured clockwise from the reference axis--0 is at the top and 90-degrees of rotation is shown on the right-hand side. A family of eight sketches is sufficient to show all possible orientations of a branch or olet (at 0, 1-89, 90, 91-179, 180, 181-269,270, 271-359 degrees).