Concentric and Eccentric Reducer are two types of reducer. Reducer is fittings to change the pipe diameter in the same direction. There are two types: concentric reducer, usually used for vertical pipelines. Eccentric reducer, usually used for horizontal pipelines.

Concentric and Eccentric Reducer

Eccentric Reducer

In horizontal pipelines, if use eccentric reducer, there are two installations: top level TF (Tops flat) and bottom flat bf (bottom flat). For example:

1. Bottom Flat Eccentric Reducer is common in the pipe gallery, to maintain the line on the same elevation. If you use a concentric reducer or a top flat eccentric reducer, the Tube gallery support will be changed.
2. The Top Flat Eccentric Reducer is more suitable for the suction line of the pump, the top level of the pipeline, the bubble will not accumulate in the pipeline.

Some cartographic staff often indicate the variable T of the pipeline center line in the drawing. When the eccentric reducer is used in the vertical pipeline, the orientation of the eccentric reducer is also a very important problem. See below drawing

Reducer Drawing

The length of the reducer has little relation with the change of pipe diameter. Therefore, some of the larger diameter of the reducer may cause fluid sudden change. For example: 6 “-2 1/2” of the reducer length is 140 mm, in such a short distance, pipe diameter is from 168.3 mm to be 73 mm. In the design phase of a piping system, piping design engineers will certainly consider such issues.

The alternative is to increase the use of the reducer, for example:

• NPS 6 – NPS 5 (L=140 mm)
• NPS 5 – NPS 4 (L=127 mm)
• From NPS 4 to NPS 3½, L=102 mm
• From NPS 3½ to NPS 3, L=102 mm

In the above scenario, the total distance from 6 “to 2 1/2” is extended to 573 mm, and the smooth transition of the fluid is ensured. In practice, similar examples may never have occurred.

Reducer Weight Chart

The post Concentric and Eccentric Reducer appeared first on Supplier of Quality Forged Fittings-Flanges.