SIMEK calculates the time dependent force course which acts at the hinges ropes of the explosion doors and lids during the venting process of silos or vessels. (Fig. 1). Afterwards a subroutine offers the possibility to adjust the hinges or the steel cables according to the occurring load. In case the venting device is weakly anchoring (demolition) the trajectories of these elements can be calculated. Furthermore it calculates the venting capability of the venting device, the reduced overpressure and the reduced rate of pressure rise.

STS calculates the most likely and the maximum flight range of debris when large parts of buildings or vessels are destroyed by the effects of dust explosions. Fig. 2 shows the input window of STS. In this example of a cylindrical vessel the yellow illustrated surface is blasted out from the vessel wall.

Vent is designed for the calculation of pressure venting areas or reduced overpressures in explosion hazardous rooms and silos (Figure 3). The calculation methods are based on formulas known from relevant literature.

The following methods are included:

• DIN EN 14491: 2012 
• DIN EN 14994:2007
• VDI 3673:2002 und 1995
• NFPA 68 Edition 2007 und 2002
• Formulas according to Prof. Dr. S. Radandt

Vessel is designed to support the dimensioning of pressure vessels based on known methods of relevant literature (Fig. 4).

BeVent is a module for calculating the necessary vent area for bucket elevators (Fig. 5). The calculation methods are based on a research report prepared by FSA that became a guideline (VDI 2263 Part 8.1 from March 2011).