Concentric Reducer is used in Petro-Chemical Industry, Oil and Gas Industry, Nuclear Industry, Pulp & Paper Industry, Research & Development, Mega Projects & Defense & Development Industries. In fact wing to the special grade of steel 90 Degree Elbows are used for all critical applications.
The open ends of a Concentric Reducer are aligned and centered one to the other. Generally, this type of pipe reducer is used to modify the bore size of the pipeline by two (maximum three) measures, to avoid an excessive pressure drop in the pipeline.
If a larger reduction is needed, then a sequence of reducers shall be used to have a smooth and gradual adjustment of the pipeline bore size (vs. a drastic change).
For small bore size reductions, Reducing flanges may be an alternative to buttweld reducers.
Size: 1/2″NB TO 48″
Schedule: SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
TYPE: SEAMLESS / ERW / welded / Fabricated
MATERIALS:
• Stainless Steel :ASTMA403 W2P GR.304, 304H, 309, 310, 316, 316L, 317L, 321, 347, 904L
• Carbon Steel :ASTM A 234 WPB, WPBW, WPHY 42, WPHY 46, WPHY 52, WPH60, WPHY 65, WPHY 70.
• Low Temperature Carbon Steel : ASTM A 234 WPL3 / A420WPL6
• Alloy Steel : ASTM/ ASME A/SA 234 GR.WP 1, WP 5, WP 9, WP 11, WP 12, WP 22, WP 91
• Duplex steel – ASTM A 815, UNSNO 31803, S 32205.
The open ends of an eccentric reducer are in an “offset” position one to the other. Eccentric Reducers are used, generally, for pipelines installed in a horizontal position (whereas concentric reducers are used for pipelines installed vertically or for the inlets of suction pumps, as top flat eccentric reducers).
Eccentric reducers can be top flat (“TF”) or bottom flat (“BF”). The bottom flat eccentric reducer type is used for pipe-racks (the bottom of the reducer is flat and at the same level of the bigger sized run pipe), while the top flat pipe reducer type is used at the inlet of piping suction pumps as shown in the image below (this setup prevents the formation of vapor traps in the pipeline).
The key difference between concentric vs eccentric reducer is the Centricity of the inlet vs. the outlet of the fitting, which is perfect for a concentric reducer and offset of an eccentric reducer.
Eccentric Reducer
Size: 1/2″NB TO 48″
Schedule: SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
TYPE: SEAMLESS /ERW / welded / Fabricated
MATERIALS:
• Stainless Steel :ASTMA403 W2P GR.304, 304H, 309, 310, 316, 316L, 317L, 321, 347, 904L
• Carbon Steel :ASTM A 234 WPB, WPBW, WPHY 42, WPHY 46, WPHY 52, WPH60, WPHY 65, WPHY 70.
• Low Temperature Carbon Steel : ASTM A 234 WPL3 / A420WPL6
• Alloy Steel : ASTM/ ASME A/SA 234 GR.WP 1, WP 5, WP 9, WP 11, WP 12, WP 22, WP 91
• Duplex steel – ASTM A 815, UNSNO 31803, S 32205.
VALUE ADDED SERVICE:
Hot Dip Galvanizing
Epoxy Coating
Cold forming is the most common manufacturing process for seamless eccentric/concentric reducers (welded reducers are produced with the single or double seam weld process)