Reducer Wall Thickness Calculation

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This analysis calculates the maximum allowable pressure for a given reducer wall thickness, and conversely the minimum wall thickness for a given pressure.

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.

Input data



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...

Weld pressure quality factor

Set based on standards. Can be calculated automatically by pressing . More...

Operation temperature

Operation temperature in operation state. More...

Operation pressure, P

Operation pressure in operation state. Set for all standards except SNIP 2.05.06-85. More...

Working pressure, Pwork

Working pressure (based on standards). Set when analyzing with SNIP 2.05.06-85. More...

Steel grade

Pipe material from the materials database


If "pressure" is selected, allowable pressure can be calculated by setting nominal wall thickness. If "wall thickness" is selected, minimum allowable wall thickness can be calculated by setting the pressure.

In both cases, wall thickness is set as no lower than the minimum allowable based on:

For SNIP 2.05.06-85, an additional wall thickness check is performed using formula (66) section 13.16.

Wall thickness is rounded up to 0.1 mm.