Should an independent control room located in an explosion-hazardous area meet the overall blast resistance requirements when positive pressure conditions are satisfied?
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According to HG/T20508-2014 Control Room Design Code, 3.2.1, the control room shall be located outside the explosion-hazardous area； According to GB50058-2014 Code for Design of Electrical Installations in Explosive Atmospheres, clause 5.3.5, substations, distribution stations, and control rooms should be located outside explosive environments; when they are positive-pressure chambers, they can be located in Zone 1 or Zone 2 ； Should an independent control room located in an explosion-hazardous area meet the overall blast resistance requirements when positive pressure conditions are satisfied? Should an explosion-proof wall still be installed on the device side? (Non-petrochemical plant central control room)
The premise of your question is wrong. 3.2.1.1 of HG20508-2014 stipulates that the control room shall be located outside the explosion-hazardous area. In other words, the control room cannot be located in an area prone to explosions. An independent control room located in an area at risk of explosion violates the code requirements.
The control room should be located outside the explosion-hazardous area.
However, GB50058-2014 Code for Design of Electrical Installations in Explosive Atmospheres allows control rooms located in explosive areas under positive pressure according to 5.3.5; which code should be followed?
Two standards are listed; when GB50058 is applied in a positive pressure chamber, it can be used in areas with explosion hazards
National standards represent the minimum requirements; for control rooms in the chemical industry, compliance with HG specifications is still necessary
Can a newly built distribution room in a petrochemical enterprise have two floors or more? Are there any specific requirements regarding explosion protection?
The purpose of positive pressure is to prevent the creation of an explosive environment inside the control room, while the purpose of shock resistance is to protect the people in the control room from harm in the event of an explosion outside
Which standard should local AJs follow – the national standard?
The maximum lateral overpressure encountered was 6.77 kPa, and the positive pressure lasted for 68.98 ms. Is it necessary for the control room to be designed with explosion resistance in mind?