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Concentric Reducer COC VS ECC

BW reducer can be concentric (COC) reducer and eccentric (ECC) reducer.The main difference is the internal structure.COC and ECC types reducers could meet different demands in many applications.You could find the summary “COC VS ECC” in the content below.

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Reducer is a common used butt welded fitting.

 

BW reducer has two types:Concentric and Eccentric

 

The two ends of concentric reducer are designed with large diameter and small diameter, and the pipe is connected through conical transition section on the same axis.

Eccentric reducers have different end sizes and are used to connect pipes with different diameters on the same axis.

 

ECC Reducer VS COC Reducer

 

  • The joint effect of the two is that the diameter change needs to change from one specification to another.
  • Concentric reducer is conducive to fluid flow, and the interference to fluid flow state is small when the diameter is reduced. Therefore, concentric reducers are used for gas and vertical flow liquid pipelines;
  • One side of the eccentric reducer is flat, which is convenient for exhaust or liquid discharge, startup and maintenance. Therefore, eccentric reducer is generally used for horizontal liquid pipeline.

 

The end of Butt welded fittings are connected to the pipe system by butt welding.Butt weld fittings provide permanent leak-proof performance.BW fittings could made from seamless or welded pipe,and then through several processes formed to get the shape of pipe fittings.

 

Product features

  • Concentric reducers will change kindly between the pump and piping.
  • Concentric reducers are tapered and are used when the diameter between pipes changes.
  • Concentric reducers provide an in-line conical transition between pressurized pipes of different diameters.
  • The length dimension of the reducer is almost equal to the average of the big bore and smaller bore pipe diameters.

 

SPECIFICATION

Shape Reducer
Size Range 1/2″ – 80″ / DN15 – 2000
Thickness Schedule SCH 10,SCH 10S, SCH 20, SCH 40,SCH 40S, STD, XS,SCH 80, SCH 80S, SCH 100, SCH 120, SCH 160, XXS
China Standard GB/T12459, GB/T13401, HG/T21635/21631, SH3408/3409
America Standard ANSI / ASME B16.9 / MSS SP 43
apan Standard JIS B2311/2312/2313
Europe Standard EN10253
Carbon Steel Q235, 20#, 35#, 45#, 20G,ASTM A234 WPB/WPC
Low Temp Carbon Steel Q345B, 16Mn, ASTM A420 WPL6
Pipeline Steel ASTM A860 WPHY 42 / 46 / 56 / 60 / 65
Alloy Steel ASTM A234 WP11 / WP12 / WP 5 / WP9 / WP91 / WP92,15CrMoG, 12Cr1MoVG, 12Cr5Mo, 1Cr5Mo, Cr9Mo, 10CrMo910, 12CrMo4-5
Stainless Steel ASTM A403 WP304/304L/304H, 316/316L, 310S, 321, 317,347,904L
Duplex Stainless Steel ASTM A815 S32205, S31803, 32750, 32760

 

 

 

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