Some issues regarding the control room

In accordance with industry standards and practical understanding, the answers to your questions are clarified as follows: 1. Regarding whether the doors of the cabinet room can lead directly to the outside, per the requirements of the \"HG/T20508-2014 Design Code for Control Rooms\", \"the cabinet rooms in control rooms shall not have doors that lead directly to the outside of the building.\" This rule is intended to prevent dust, moisture, contamination, and to maintain stable environmental conditions. The on-site cabinet room in the plant area you mentioned belongs to the on-site auxiliary facilities, and it is not the cabinet room in a control room as strictly defined by the standards; in actual projects, it is generally considered that a certain degree of differentiation can be applied. If it is truly unavoidable on-site, and under the conditions that meet process requirements and safety standards, the insufficient requirements can be addressed by raising the protection level of the cabinets (such as achieving an IP rating or providing dust-proof sealing). 2. Can a door leading directly to the outside be installed in the control room? From the perspective of maintaining environmental cleanliness, preventing the influence of external climate conditions, and ensuring stable air flow, it is advisable to avoid having doors that lead directly outside the control room; instead, an entrance vestibule (air lock or buffer room) is usually used to meet these requirements. If on-site conditions prevent the installation of a vestibule, other effective measures should be taken to ensure a satisfactory indoor environment. These include installing air curtains, sealed doors, positive-pressure air conditioning systems, and filtered fresh air systems to improve airtightness and meet environmental standards. After proper evaluation and by providing explanations for any deviations from standards or relevant design specifications, such alternative solutions can also be considered. 3. When multiple production units are operated from a single control room, whether this constitutes a central control room is defined in accordance with relevant standards such as the \"Code for General Layout and Transportation Design of Chemical Enterprises.\" In the general sense, a central control room not only enables centralized production operations but also provides functions such as unified command and scheduling across the entire plant or even an entire region, as well as production management and information management. Here, \"production management\" and cross-unit production scheduling refer to more comprehensive management functions at the plant-wide or even enterprise-level, including overall planning, decision-making, and scheduling adjustments, rather than merely simple coordination between a few related production units. Therefore, a simple control room in which multiple workstations are controlled centrally should generally still be classified as an ordinary “control room,” and cannot usually be automatically regarded as a “central control room.” However, only if such a control room also possesses higher-level information management systems, simulation training systems as defined by the standards, and true plant-wide management functions, can it be considered a central control room. The above explanations are provided for your reference; in actual project implementation, a comprehensive decision should be made by taking into account the specific conditions on site, the requirements of the client, as well as the regulations set by departments such as those responsible for safety, fire protection, and environmental protection. .