Is it necessary for the control room to have an explosion-proof design? ?
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There is a project in which the central control room is located in the area in front of the factory. The instrumentation team requires an explosion-proof design, while the process engineering team believes it is not necessary. What are everyone’s opinions?
Whether the control room requires blast-resistant design is determined based on the overall layout, the risk of organic cloud explosions, the design specifications for control rooms, and the standards for blast resistance in control rooms, through processes of design, calculation, and construction. That is, how to arrange the control room, whether an explosion-proof design is needed, how to conduct explosion-proof calculations, etc. The design institute will carry out the design; it’s not about whether it’s necessary or who the expert is that decides.
Thank you to the expert upstairs for providing the information; it’s been very educational
Let’s see how the design institute calculates it for you. It’s not blast-resistant at the moment, and you’ll still need to make adjustments in the future – you’ll have to move the DCS and its cabinets, which is a hassle
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The core issue is to conduct an explosion hazard risk assessment for the target point! It is entirely based on the calculated results. The conservative approach is to design for blast resistance, but without taking into account the blast load, it remains a theoretical design. If no calculation of blast risks is carried out yet blast resistance is still to be considered, then 21 kPa is used as the blast load value in the area in front of the factory ； The refinery we visited, which was built in recent years, has its central control room located in the front area of the plant; it is also designed to be explosion-resistant. However, it is clear that the explosion load it can withstand does not exceed 21 kPa. On the other hand, the central analysis room located right across from it was not constructed as an explosion-resistant building ； The current situation is quite absurd: the blast-resistant doors in the central control room, which are meant to provide protection against explosions, are usually left fully open, rendering them completely useless. Yet due to existing requirements, designers have no choice but to go ahead and build them anyway. Therefore, for control rooms, it is better to adopt a conservative approach and make them blast-resistant; if non-blast-resistant design is to be used, computational evidence must be provided.
It’s common sense: after the design process and overall layout are completed, an explosion hazard analysis is conducted based on the location to determine whether the safety distances are sufficient. It’s enough; there’s no need for an blast control room.