Questions regarding the classification of major hazard sources
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This post was last edited by 292939920 on 2020-3-12 at 12:46. According to Article 4.1.1 of GB18218-2018, major hazard sources of hazardous chemicals can be classified into major hazard sources of hazardous chemicals in production units and major hazard sources of hazardous chemicals in storage units. Do both the production unit and the storage unit refer to the whole? Can it still be further broken down into individual monomers? For example: a factory complex has Production Unit 1 and Production Unit 2, as well as Storage Unit 1 and Storage Unit 2. Production Unit 1, Storage Unit 1, Production Unit 2, and Storage Unit 2 each fall below the critical threshold, but Production Unit 1 and Production Unit 2 together exceed the critical threshold, and Storage Unit 1 and Storage Unit 2 together also exceed it. If it’s considered as a whole, then do both the production units and storage units constitute major hazard sources? If considered separately, do production unit 1, storage unit 1, production unit 2, and storage unit 2 not all constitute major hazard sources? Which way should it be done? I would appreciate some guidance from an expert.
The latest standards for hazard identification have been issued; each tank group or device unit equipped with isolation valves must be assessed separately
I tried to look for it but couldn’t find it. Could you please let me know exactly where this requirement is specified?
This post was last edited by ZXY_ZVKP on 2020-3-14 07:38. I happened to study those provisions some time ago, :) Please refer to GB18218-2018; there are significant changes compared to the original version. Unit classification: Major hazard sources are identified separately based on production units and storage units, rather than being identified as a single unit based on an edge distance of 500 meters. 1. Division of production units: (1) For production facilities, units should first be divided based on the principle of having clear fire separation distances and relatively independent functions; where there are isolation valves between units, these valves shall be used as the boundary for dividing the units ； If there are no isolation valves between units, they are considered as one production unit. For the intermediate storage tanks within the production facility, they are, in principle, identified together with the production facility. (2) For a production facility that contains multiple sets of production equipment, it shall be identified as a single unit. The intermediate warehouse within a production plant and the plant as a whole are identified as units. (3) Mobile equipment such as tank containers, road tankers, and railway tank cars, when managed as fixed facilities, should have their major hazard sources identified together with those of the fixed facilities. 2. Storage unit classification: (1) If there are multiple floors or multiple fire compartments within a separately located warehouse, it should be identified as one unit. (2) Hazardous chemical tank areas should be identified as a single unit as part of the overall tank farm. If the storage tank area is not arranged in a centralized manner, it should be divided into separate units for identification.
If production units are divided into individual entities, does each of these entities need to be assessed to determine whether it constitutes a major hazard source?
If it constitutes a major hazard source, an evaluation and confirmation are definitely required.
According to the 2018 version, it’s better to calculate them separately, as in Warehouse 1, Warehouse 2, Workshop 1, Workshop 2. Determine separately whether it constitutes a major hazard source. That’s the case in Jiangsu.