Read about START-PROF pipe stress analysis software
When analyzing vacuum sections, pipe cross-section local stability to excess external pressure Pwork must be checked. Analyses are done using GOST 32388-2013 with an adjustment to No.1.
Stiffening rings can be placed at set interval along the pipe axis to increase stability for external pressure.
K - stability factor, Ky stability factor under external pressure load, axial force, bending moment, shear force.
Input data can be copied using the
toolbar
icon and inserted into any other Start-Elements analysis by using the 
toolbar icon in
that file.
Property |
Description |
External diameter, Da |
External pipe diameter, D |
Operation temperature |
Operation temperature. More... |
Mill tolerance |
Mill tolerance at the time of production. More... |
Corrosion and wear allowance |
Corrosion and wear allowance (working mill tolerance) for wall thickness. More... |
Stability safety margin |
Based on GOST 32388-2013, stability safety margin is set as
|
Operation pressure, P |
Operation pressure in operation state. Set for all standards except SNIP 2.05.06-85. More... |
Steel grade |
Pipe material from the materials database |
If "pressure" is selected, allowable external pressure under which stability is maintained can be calculated by setting nominal wall thickness. If "wall thickness" is selected, minimum allowable wall thickness can be calculated by setting the maximum external pressure (vacuum) and test pressure. In this case, stability analysis for vacuum and strength under test pressure is checked.
Pipe. Above-ground > Strength Analysis of Vacuum Element