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This post was last edited by The one on 2025-12-8 08:17. Requirements for the interlock function of explosion-proof doors in explosion-proof control rooms: The interlock requirements for such doors are clearly specified in the \"Code for Explosion-Proof Design of Petrochemical Buildings\" (GB/T 50779-2022), as follows: Interlock function and handling in fire situations: The interior and exterior doors of the room must have an interlock feature that prevents them from being opened simultaneously. This is to prevent the inner and outer doors from opening simultaneously in dangerous situations such as explosions, thereby avoiding unimpeded entry of explosion shock waves into the control room and ensuring the safety of the people and equipment inside to the greatest extent possible. At the same time, taking special situations such as fires into account, this interlock should be automatically disabled in the event of a fire, so as to ensure that people can evacuate smoothly and prevent the escape routes from being blocked by the interlock. Requirements for door leaves and observation windows: The door leaves should open outward, as this design facilitates quick exit by people in emergency situations and reduces the time required to open the doors. At the same time, automatic door closers should be installed to ensure that the doors close automatically after people have passed through, thereby maintaining the blast resistance of the control room. The door should also be equipped with blast-resistant observation windows, allowing those inside to observe the outside situation without having to open the door, thus enabling them to stay aware of any potential dangers in a timely manner. Furthermore, when the door is closed, the gap around it should remain sealed to prevent explosion shock waves from entering the room through that gap. Moreover, after being subjected to explosive loads, the door should still be able to open and be used normally, so as to ensure that people can evacuate or receive rescue through this door even after being impacted by an explosion. Value of explosion shock wave overpressure: The explosion shock wave overpressure at the interior door before isolation is taken as 50% of the overpressure at the exterior door. This regulation clarifies the relationship between the pressure values required for the blast resistance design of interior doors and exterior doors, which helps to design the structure and strength of these doors in a proper manner while meeting safety requirements, thereby ensuring consistent blast resistance throughout the entire blast resistance control room. The specifications for the interlock requirements of blast-proof doors in blast-resistant control rooms aim to enhance the safety and reliability of such rooms through a range of specific measures, covering everything from the setup of interlock functions and the detailed requirements for door panels and observation windows to the values designated for explosion shock wave overpressure. In actual engineering design and construction, strictly adhering to these specification requirements is of vital importance for ensuring the safety of personnel in petrochemical plant control rooms during explosion accidents as well as the proper operation of equipment.