[2026 Explosion Resistance Design] The interlock of the chemical industry explosion-resistant control room door should be able to be automatically disengaged in case of a fire

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This post was last edited by The one on 2026-7-10 09:44. \"Code for Blast Resistance Design of Petrochemical Buildings\" GB ∕T50779-2022 5.2.1 When the peak overpressure of the explosion shock wave is greater than 1.0 kPa and not more than 6.9 kPa, the exterior doors and windows used in blast-resistant buildings shall comply with the following requirements: 1. The glass installed in the exterior doors and windows of buildings shall be tempered glass or laminated tempered glass; 2. The exterior doors located at the building’s safety exits shall open outward, and automatic door closers shall be installed. 5.2.2 The blast-resistant protection doors used in blast-resistant buildings shall comply with the following requirements: 1. The door frames and doors shall be made of steel, and their fire resistance integrity shall not be less than 1.00 hour. 2. The structure and performance of the blast-resistant doors in personnel passages shall comply with the following requirements: 1) The dimensions of the opening should not exceed 1800 mm (width) × 2400 mm (height); 2) The door leaves should open outward, and automatic door closers as well as blast-resistant observation windows shall be installed. The door seals must remain intact when closed, and the doors should be able to open and function properly after being subjected to explosive loads; 3) The overpressure caused by the explosion shock wave on the interior door before isolation should be 50% of that caused by the explosion shock wave on the exterior door; 4) Both the interior and exterior doors should have a interlock mechanism that prevents them from opening at the same time, and this interlock should be automatically disengaged in case of a fire; 5) The glass in the blast-resistant observation windows must not break under explosive loads, and it should remain transparent even when heated on the outside. 3. The structure and performance of the blast-resistant doors for equipment passages shall comply with the following requirements: 1) The dimensions of the opening shall meet the requirements for equipment entry and exit, and such dimensions should not exceed 2400 mm (width) × 3000 mm (height); 2) Under the effect of explosive loads, the door may undergo permanent deformation, but it must not collapse entirely or have any components fall off; 3) The door leaves shall open outward, and no glass windows shall be installed; 4) Blast-resistant door locks shall be provided.