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The free engineering tools are online tools for quick engineering support. The tools provide a first attempt to bring engineering to the Internet or Cloud. Based on this experience Red-Bag will develop further tools and interactive information. Users and customers are encouraged to give their feedback for further improvement of these tools.
The calculation applications will be online as well but require a license fee. The first application is expected in the near future. Frequently check our website or subscribe to our newsletter.
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Use this tool to calculate the volume of a horizontal drum with a measured liquid level.
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This page provides a starting point when dealing with equipment or piping according the Pressure Equipment Directive. The first step is usually to determine the classification category of the equipment or piping. This classification defines the further requirements such as material certificates, design method and calculations, testing and documentation requirements.
PED classification procedure in short
- Provide a tag (or equipment) number and optionally a name to identify the subject item
- Indicate the type of equipment which will define one of the three table groups (1,2,3,4 or 5 or 6,7,8,9)
- Only for the pressure accessory it is required to indicate the assessment background (volume or nominal size of pipe)
- Select the fluid state and group, this will define the applicable table
- Enter the maximum pressure, maximum temperature (is sometimes required for example generators), the volume (for equipment and accessories) or the nominal diameter DN (for piping and accessories)
- The additional information is required to be selected where applicable to determine possible exceptions to the classification tables
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Shell and tube heat exchangers are complex and more expensive than ordinary pressure vessels. Also the strength calculation is more difficult. Part of the design process includes the determination of the amount of tubes to be used in the heat exchanger. The number and length of the tubes create the area through which the heat is transferred from one process medium to the other. The outside of the shell and tube heat exchanger is mostly a cylindrical form which make the calculation by hand for the amount of tubes difficult. The number of tubes and the dimensions are required to execute the calculation for the tube sheet.
The Tube Sheet Lay-out page facilitates the calculation of the amount of tubes. The calculation can be done for four (4) pitch patterns (how the tubes are laid out) and for ten (10) types of passes (tube compartments).
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To calculate the profile and the outside dimension of a cone from a flat plate. A cone for a column for example is usually first cut out a flat plate and then rolled to shape.
A design calculation has to be done to determine the actual dimensions of the strike-out from the flat plate. Some extra margins (allowances) can be added to the ends of the cone to be able to prepare the ends (for example by grinding) for welding purposes. Below figure indicates the meaning of the required dimensions necessary to execute the design calculation.