Regarding the use of eccentric reducers
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Regarding the use of eccentric reducers in piping design. As far as I know, the pump inlet is set at the top level. For horizontal pipes, if the medium being transported is a liquid, a flush joint method is used. But what if the medium transported in horizontal pipes is a gas? Are there any other situations?
Generally, there aren’t that many rules in reality; of course, there are many rules in the office
To prevent fluid accumulation, it should have a flat bottom. This is stipulated in the design specifications.
When the medium being transported is a gas, it is necessary to check whether there is any condensate present. If so, eccentric tees should still be used; whether the top or bottom of these tees is flat depends on the direction of fluid flow, with the aim of preventing liquid buildup.
Except at the inlet of centrifugal pumps where a flat top is used to prevent cavitation, in other cases eccentric tees are used following the principle of avoiding the formation of liquid pockets or air pockets.
To prevent fluid accumulation, it should have a flat bottom.
http://bbs.hcbbs.com/viewthread.php?tid=345285&highlight=%B4%F3%D0%A1%CD%B7, it should be helpful
Thank you, is there a detailed document?
It is recommended that the original poster check out the “Chemical Process Piping Handbook”.
Not all of them use a flat top; it depends on what function is required. A flat top helps prevent air buildup, while a lower profile helps prevent liquid accumulation. It also depends on the direction in which it’s used. You can look up relevant books – there are rules regarding this
Based on the fluid and application, it must be confirmed that the bottom of the pipe rack is flat! Level the pump inlet; those who have used this in practice can share some examples! :handshake
Generally, reducer pipes are divided into three types: flat top, concentric, and flat bottom. Flat top type is used for the pump suction inlet to prevent damage to the pump when air accumulates and the pump starts operating； For vertical pipes, a concentric design is used; for pipes in utility tunnels, a bottom-flat design is employed. When there are gases in the tunnel, condensation may occur, so a bottom-flat design is necessary in that case. Generally, it is best for the flow direction of the condensation to be the same as that of the gas. Of course, there are special cases, and those need to be dealt with as such.