Read about START-PROF pipe stress analysis software

Custom Pump

Analysis results can be found in Loads on Nozzles and Equipment Table. See also "How to Reduce the Nozzle Loads in START-PROF". The Other Pump object is used for checking the loads on other pumps like API 676 "Positive Displacement Pumps" and others.

Properties

 

Property

Description

Name

Element name. If checked then it shown in 3D view

Auto calculation of nozzle temperature movements

Automatically calculate the nozzle movements as DX*Alpha*(T-Ta), DY*Alpha*(T-Ta), DZ*Alpha*(T-Ta), where Alpha is thermal expansion factor (taken from selected material properties), T is equipment temperature, Ta is ambient temperature, DX, DY, DZ are distances from pump center. If checkbox is not checked, then nozzle movements can be specified manually

Material

Material from materials database

Manufacturing technology

For ASME B31.1, ASME B31.3, DL/T 5366-2014 seamless pipe will always use Wl=1.0. For electric-welded pipe Wl will be specified from database. More...

When using  GOST 32388-2013, pipe physical properties are taken from different materials databases depending on pipe type (seamless/welded).

Temperature

Pump Temperature. More...

This property can be changed in different operation modes. To see the value of this property in all operating modes push the button

Shaft Axis Orientation

Shaft X-axis direction according to drawing:

Pump Center Point Offsets

The node, and offsets from this node to the pump centre (point 3 on the drawings above)

Remove restraints for hanger selection

If this option is activated, then some restraints are removed from nozzle element during weight run of variable and constant spring selection. During main analysis restraints are working. This trick allows to remove the weight part of loading from the nozzle element. Springs will take the exact load, at which displacements from pure weight load is zero. Options:

  • Remove vertical restraint. Only vertical restraint will be released during hanger selection

  • Remove custom restraints. You should manually choose which restraints should be released during hanger selection

  • Remove all restraints. During hanger selection all direction restraints will be released

Allowable Exceed Factor

The default value is 1.4. You can change this value according to pump manufacturer instructions.

Suction Nozzle

Discharge Nozzle

Set the node number to which suction and discharge nozzles are connected to. Also specify the type of nozzle (Top, Side, End). If other side piping model is absent, you can specify the loads manually, just select "Set Custom Loads"

Check Allowable Loads for Pump

Pump allowable loads are taken from input data and also additional check performed according to equation

Menu and Toolbar Access

To insert a pump, select the desired node and use the menu option: Insert > Equipment > Other Pump