What is the difference between a concentric and eccentric reducer?
Concentric reducers reduce the pipe in the center. So, if you’re looking at the reducer head-on, you can see the smaller section is formed in the direct center of the larger side. Eccentric reducers reduce the pipe to the side. Eccentric reducers are used when the pipes have to maintain the same top or bottom level.
What is the purpose of eccentric reducer?
Eccentric reducers are used at the suction side of pumps to ensure air does not accumulate in the pipe. The gradual accumulation of air in a concentric reducer could result in a large bubble that could eventually cause the pump to stall or cause cavitation when drawn into the pump.
How should an eccentric reducer be installed?
When the source of supply is above the pump, then the eccentric reducers must be placed with the flat side down. When the source of supply is below the pump, then the eccentric reducers must be placed with the flat side up.
Where are concentric and eccentric reducers used?
Concentric reducers are used where the pipework is vertically installed and at the discharge side of pumps. Eccentric reducers are more often used when the pipework lays on a pipe rack. Because of the flat side, aligning and securely mounting the pipes to the rack is easier.
What are the two types of reducer?
There are 2 types of standard reducers available: concentric and eccentric reducers. The concentric one, which resembles a cone, is used to join pipe sections on the same axis. The eccentric type has an edge which is parallel to that of the connecting pipe, which allows it to align with one side of the inlet.
Can we use eccentric reducer in pump discharge?
Discharge Line Piping Fittings Due to discharge lines being larger than the discharge nozzle, eccentric reducers are required in the line. Avoid supporting large lines from pipe-rack structures if possible, this enables minimum-size beam sections to be used and better access for pump removal and maintenance.
Why suction pipe is bigger than discharge?
The discharge pipe may be larger than the suction pipe. The purpose of the lines is to keep the losses to a minimum. This is done to make sure there is enough Net Positive Suction Head available to meet the requirements of the pump.
What are pipe reducers?
A reducer is a component in a piping system that changes the pipe size from a larger to a smaller bore. A reducer allows for a change in pipe size to meet flow requirements or to adapt to existing piping. The length of the reduction is usually equal to the average of the larger and smaller pipe diameters.
What is offset in eccentric reducer?
2, in eccentric reducer there is an offset in between the center lines of the bigger end and the centerline of smaller end. This offset or eccentricity will maintain a flat side either on top or on the bottom side.
Why does pump discharge reducer?
If the fluid is coming from the top, the flat portion of the reducer should be mounted on the bottom of the pipe. This flat portion is specially designed to discourage an air pocket from forming within the pump suction.
What happens if suction line is too small?
Liquid lines have similar design limitations as suction lines. A liquid line that is too small will have too much pressure drop. This can cause the liquid to begin to boil before it reaches the metering device. This effectively causes a restriction.
Why do you insulate the suction line?
Insulating the suction line is done to prevent condensate from developing and dripping off. This condensate drip can cause water damage to the material under it or cause a slip hazard for people walking below it.
What is the function of an eccentric reducer?
An eccentric reducer is a fitting used in piping systems between two pipes of different diameters . They are used where the diameter of the pipe on the upstream side of the fitting (i.e. where flow is coming from) is larger than the downstream side.
What type of use in concentric reducer and eccentric reducer?
Concentric Reducers are used for vertical piping whereas eccentric reducer are used at Pipe rack to maintain bop and Flat side Up at Pump Suction to avoid cavity. Eccentric reducers are used to maintain the same bottom of pipe.
What is eccentric fitting?
eccentric fitting. Any fitting, 1 in which the center line is offset from that of the run of pipe.