Regarding the piping issues of naphtha loading and unloading pumps
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As the title suggests, 1. The loading pump (for naphtha) used in our company is a conventional centrifugal pump. I feel there might be some issues with this choice; usually, shielded pumps or magnetic drive pumps are selected. I’m not sure if using a centrifugal pump will cause any problems 2. I also have some doubts regarding the piping for this pump. Should the eccentric reducer at the pump inlet be set at a level position or lower? Our company’s design team recommended a level position, but I personally think it should be set lower. I would appreciate it if fellow experts could discuss this and offer some suggestions!
The naphtha pump in our unit is a regular centrifugal pump; there is no dedicated pump for loading naphtha. However, our gasoline loading pump is also a standard centrifugal pump, so there is no problem with that. When installing the pump piping, the reducer at the pump inlet is usually set at a flat level, so that no air can accumulate in the pipeline and cause cavitation in the pump, resulting in a loss of flow rate. You can search for “uses of reducer pipes”; there are plenty of discussions on forums.