Determining the bolt parameters
●
The following bolt parameters are taken from the "Dimensions" tab of the geometry table
for flanges.
– Hole circle
– Outer diameter flange
– Number of bolts
– Dimension for bolts and nuts
COMOS determines which geometry table is used during runtime by evaluating
parameters, such as the connection type and pressure stage of the flange.
● Nut height and overlap are determined as follows:
– COMOS reads out the nominal diameter of the flange.
– COMOS reads the suitable dimension from the "DIM" column of the geometry table
containing the bolt parameters.
– COMOS then refers to the geometry table for nuts to determine which nut height and
which overlap have been specified for this dimension.
● The height of the washers is determined as follows:
Same as nuts. COMOS takes the height of the washers from the geometry table for washers.
Calculation of the theoretical bolt length
Now all parameters required to calculate the theoretical bolt length are known.
Formula: Bolt length = Hole circle + 2* height of the washer + nut height + overlap
COMOS searches the basic table for bolts for the dimension specified by the basic table for
flanges in order to find the value equal to the calculated bolt length, or failing that the next
highest value.
This value is the calculated bolt length.
See also
Fundamentals of bolt sets (Page 63)
Using bolt sets in pipe specs (Page 110)
13.3 Example report for pipe spec documentation
The database contains a preconfigured example report for pipe spec documentation.
The report is created under the base object for pipe specs:
"@20 > C90 > A10 > A20 > A20.DA.001 Pipe spec documentation"
Database reference
13.3 Example report for pipe spec documentation
PipeSpec Designer
148 Operating Manual, 09/2014, A5E32076948-AA
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