Safety distance requirements for pump areas

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This post was last edited by sunnyartboy on 2021-11-28 at 22:40. Background: The factory has a storage tank area that contains 2 propylene oxide tanks with a capacity of 5,000 liters each, 1 methanol tank with a capacity of 7,000 liters, and 1 propylene glycol methyl ether tank with a capacity of 7,000 liters. In the initial design, the pump units were placed in separate enclosures within the tank area; the propylene glycol methyl ether pump along with its associated basket filter were located outside those enclosures (in the recessed area, right below the pipe rack, very close to the edge of the factory site – less than 1 meter away). However, during the safety assessment at present, in accordance with Article 5.1.14, Clause 1 of the oil depot standard GB50074-2014, pump stations for Class A, B, and C liquids should be located outside the fire dike of above-ground vertical storage tanks. (Actually, the same is true for petrochemical regulations.) So now we have to move the pumps, even those that are installed inside the cofferdam, outside of it. Question: 1. Can the four pumps inside be moved to the propylene glycol methyl ether area (by placing their blue filters inside the enclosure, thus freeing up space)? Note: The pumps are very close to the edge of the road, less than 1 meter away, and is it possible to place them together with the propylene glycol methyl ether pumps? 2. Is there a mandatory distance requirement for pumps in the tank area to be located from the roadside of the plant? Is that standard mandatory? 3. Can the cofferdam around the tank area be made indented by two sections, so that the pumps inside the cofferdam can be placed in those indented areas? Does this require re-submitting the master plan? (Since a cofferdam was previously installed there for the pump, if I make the cofferdam in my storage tank area recessed and remove the pump cofferdam by placing it outside that cofferdam, won’t this affect the volume of the cofferdam?) ) 4. Are there any other better ways? Thank you!