Automatic Adjustment of Nominal Diameter Condition

If a part is to be inserted on a guideline, HiCAD will search for a part connection - starting from the desired insertion point on the guideline in both directions along the guideline segments that are still empty. The nominal diameter of the found connection can be used for the search condition of the nominal diameter of the part to be inserted.

The nominal diameter found in the one direction is N1 (the corresponding part is B1), the nominal diameter found in the other direction is N2 (the corresponding part is B2). Of course, it may be the case that a connection will be found only in one direction - you will the only have N1 or N2. If no parts exist on the guideline at all, no nominal diameter conditions can be created.

The creation of the nominal diameter condition is dependent on

• the part type of the found parts, and
• the part type of the part to be inserted.

Parts of the part type Branch, T-piece, Y-pipe, saddle connection, which are referred to as Branching parts, show a special behaviour. All other part types belong to the group Others.

For Branching parts to be inserted, no nominal diameter condition will be created from N1 or N2. If one of the two found parts B1 or B2 is a Branching part, only the nominal diameter of the Branching part will be used for the nominal diameter condition.

The table below shows you how the nominal diameter condition is determined.

 

Possible cases:

	B1	Branching part	Others	No part
B2
Branching part		C12	C2	C2
No part		C1	C12	C2
Others		C1	C1	--

 

Determination of nominal diameter conditions for the attributes Nominal diameter and Nominal diameter

Part type of part to be inserted	C1	C2	C12
Branching part	No condition	No condition	No condition
Reducer	Nominal diameter = N1	Nominal diameter = N2	N1 > N2: Nominal diameter = N1 Nominal diameter2 = N2 N2 > N1: Nominal diameter = N2 Nominal diameter2 = N1
Elbow	Nominal diameter = N1	Nominal diameter = N2	Nominal diameter = N1 OR Nominal diameter = N2
Other part types	Nominal diameter = N1 OR Nominal diameter2 = N1	Nominal diameter = N2 OR Nominal diameter2 = N2	N1 = N2: Nominal diameter = N1 OR Nominal diameter2 = N1 N1 ≠ N2: Nominal diameter = N1 OR Nominal diameter = N2 OR Nominal diameter2 = N1 OR Nominal diameter2 = N2

This automatic determination of the nominal diameter condition will only be applied if no nominal diameter has been specified for the pipeline and the processed guideline.

The automatism will only work if you have activated the All part types checkbox for the Nominal diameters on the Part search tab of the Plant Engineering Settings dialogue window:

This automatism can be switched off by activating the Ignore nominal diameter checkbox in the Pipe parts dialogue window.

Pipe Parts, Components, Pipelines (PE) • Plant Engineering Settings (PE)