Discussion on the layout design of flame and gas detectors

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This post was last edited by goldliyang on 2020-6-13 09:41. The placement of flame and gas detectors has always been a challenging design issue. The GB50493-2019 \"Design Standards for Detection and Alarm Systems of Flammable and Toxic Gases in Petrochemical Industries\" introduces some updates, setting new requirements regarding the locations and spacing of these detectors. But exactly how many detectors are needed in a particular petrochemical facility? Where should it be placed? What testing techniques need to be used? In the actual design process, there is still a great deal of negotiation and reliance on experience when dealing with these issues. Research on the design of fire and gas detection systems abroad began quite early on, and a series of standards and design guidelines have been established, such as ISA-TR 84.00.07 (2018) Guidance on the Evaluation of Fire, Combustible Gas, and Toxic Gas System Effectiveness. This standard outlines the design process for FGS systems and introduces the concept of evaluating detection coverage. BP explicitly requires the use of 3D modeling to assess the placement and coverage of detectors in its latest GP 30-85 Fire-and-Gas-Detection Guide design guidelines ； Furthermore, a two-step implementation strategy is proposed, at the FEED and detailed design stages respectively. SHELL also states in the DEP 32.30.20.11 – Fire, Gas and Smoke Detection Systems guidelines for fire and gas system design that 3D modeling should be used to assess the detection coverage of flame and gas detectors. To this day, in many of SHELL’s projects, the requirement of a 90% (1/N) detection coverage rate is still being followed. Friends who need the above materials please contact me within the platform ； This post allows for one-on-one responses over an extended period; feel free to discuss the placement of fire detectors at length.