Read about START-PROF pipe stress analysis software
Above-ground pipe segments are checked for internal pressure wall thickness requirements.
Buried segments are checked for external pressure and soil loading using PUR insulation analysis methods, verifying stability and safety factors.
Copy input data using 
and paste into other Start-Elements
analyses using 
.
Surface load strength calculation follows the hoop stress method.
Property |
Description |
External diameter, D |
External pipe diameter |
Pipe wall thickness, S |
Nominal wall thickness |
Mill tolerance |
Manufacturing tolerance. More... |
Corrosion allowance |
Corrosion and wear allowance. More... |
External casing diameter, Dc |
External insulation casing diameter. Set to 0 if no insulation. |
Casing thickness, SC |
Insulation casing thickness |
Weld bending quality factor |
|
Ambient temperature |
Pipe metal temperature during system assembly. More... |
Operation temperature |
Operating temperature. More... |
Depth, Z |
Distance from soil surface to pipe axis |
Insulation weight |
Uniform insulation weight. More... |
Product weight |
Uniform product weight. More... |
Backfill soil number |
Trench soil number from soil database (see appendix 1 below) |
Base soil number |
Base soil number from soil database |
Steel grade |
Pipe material from materials database |
Operation pressure, P |
Operating pressure for all standards except SNIP 2.05.06-85. More... |
Working pressure, Pwork |
Working pressure for SNIP 2.05.06-85. More... |
Insulation type |
Armopenobeton, polymer, polyurethane, other |
Select "pressure" to calculate allowable pressure for a given wall thickness. Select "wall thickness" to calculate minimum allowable thickness for a given pressure.
Wall thickness must not fall below minimum requirements per:
SNIP 2.05.06-85 section 8.22
RD 10-249-98 section 3.3.1.3, table 3.3
GOST 32569-2013
GOST 32388-2013 table 1.3
For SNIP 2.05.06-85:
Above-ground segments use formula (12)
Buried segments use formula (13), with longitudinal stress per formula (18)
Wall thickness analysis per formula (66) section 13.16 is not performed
Wall thickness rounds up to 0.1 mm.
Pipe. Above-ground > Wall Thickness Analysis
Pipe. Buried > Wall Thickness Analysis
.