4.5 Calculation of wafer-type screws (WF)

Module 5 – Calculation of Wafer (WF) Type Screws

In this article, you will learn how Module 5 – Calculation precisely calculates the required length for "Wafer" (WF) type screw connections. These special screws are used in piping technology to create a secure connection through two flanges and an intermediate valve body.

The precise determination of the screw length is essential for error-free material planning and subsequent assembly on the construction site. The automated calculation in the system takes into account all relevant mechanical components of the connection structure.

Components of the Length Calculation

To determine the correct total length of a wafer screw, the system automatically sums the following technical parameters:

• Contribution of the nuts: Here, the standardized Nut Thickness is multiplied by the Number of Nuts Used.
• Contribution of the washers: The calculation takes into account the Washer Thickness multiplied by the Total Number of Washers in the assembly.
• Valve Body Length: This value is read directly from the technical metadata (property Length) of the corresponding valve.
• Flange Thicknesses: The system adds the specific Thicknesses of both flanges involved on both sides of the connection.
• Additional Length: A defined safety or protrusion value (Additional Length) is added to the total sum to ensure a professional thread protrusion.
• Stub-End Offsets: If applicable due to the design, the offset values of the stub ends for both sides are automatically included in the calculation.

Through this detailed breakdown, the module ensures that the calculated screw length exactly corresponds to the physical requirements of the piping components and that assembly errors caused by bolts that are too short or too long are avoided.