Concentric and Eccentric Reducer

Butt Welding Pipe Fittings

Size: 1/2"-80"/DN15-DN2000

Material: Carbon Steel, Stainless Steel, Alloy Steel

Standard: ASME/ANSI B16.9, B16.11, B16.28, JIS B2311, B2312, B2312, B2316 ASTM A403 MSS SP-43, SP-83, SP-97

Type: Seam Or Seamless

End: beveled end

Surface: Black Paint/Rust-proof Oil/Hot Dipped Galvanized

Wall Thickness: SCH10/10S, SCH20/20S, STD, SCH40/40S, XS, SCH80,SCH100, SCH120, SCH140, SCH160, XXS etc.(for ANSI),SGP(for JIS)

Connection: Welding

Inquire Now

Share to:

Introduction

Reducer is a pipe coupling with a larger bore size at one end and a smaller bore size at the other end. It is used to change the flow rate in the pipeline. Based on connection ways, there are 3 types of reducers: threaded reducer, grooved reducer, and butt welding reducer.

FAQ: What is the difference between a concentric and eccentric reducer?

The Concentric reducer's two ends are centered in a line, while the Eccentric reducer has the offset center of both ends and has an edge that is parallel to the pipe. Concentric pipe reducer is used when the pipe is vertical and eccentric reducer is often used when the pipes are laid on a pipe rack, because of the parallel edge, it could allow the reducer and pipe next to the walls or ground without taking up space.

ASME B16.9: Pipe Reducers

Concentric and Eccentric Reducer

Dimensions of Recucers - ASME B16.9

NPS	OD at Bevel		End-to- End, H
NPS	Large End, D	Small End,D1	End-to- End, H
3/4×1/2	26.7	21.3	38
3/4x3/8	26.7	17.3	38
1×3/4	33.4	26.7	51
1×1/2	33.4	21.3	51
1-1/4×1	42.2	33.4	51
1-1/4×3/4		26.7
1-1/4×1/2		21.3
1-1/2×1-1/4	48.3	42.2	64
1-1/2×1		33.4
1-1/2×3/4		26.7
1-1/2×1/2		21.3
2×1-1/2	60.3	48.3	76
2×1-1/4		42.2
2×1		33.4
2×3/4		26.7
2-1/2×2	73	60.3	89
2-1/2×1-1/2		48.3
2-1/2×1-1/4		42.2
2-1/2×1		33.4
3×2-1/2	88.9	73	89
3×2		60.3
3×1-1/2		48.3
3×1-1/4		42.2
3-1/2×3	101.6	88.9	102
3-1/2×2-1/2		73
3-1/2×2		60.3
3-1/2×1-1/2		48.3
3-1/2×1-1/4		42.2
4×3-1/2	114.3	101.6	102
4×3		88.9
4×2-1/2		73
4×2		60.3
4×1-1/2		48.3
5×4	141.3	114.3	127
5×3-1/2		101.6
5×3		88.9
5×2-1/2		73
5×2		60.3
6×5	168.3	141.3	140
6×4		114.3
6×3-1/2		101.6
6×3		88.9
6×2-1/2		73
8×6	219.1	168.3	152
8×5		141.3
8×4		114.3
8×3-1/2		101.6
10×8	273	219.1	178
10×6		168.3
10×5		141.3
10×4		114.3
12×10	323.8	273	203
12×8		219.1
12×6		168.3
12×5		141.3
14×12	355.6	323	330
14×10		273
14×8		219.1
14×6		168.3
16×14	406.4	355.6	356
16×12		323.8
16×10		273
16×8		219.1
18×16	457.2	406.4	381
18×14		355.6
18×12		323.8
18×10		273
20×18	508	457.2	508
20×16		406.4
20×14		355.6
20×12		323.8
22×20	558.8	508	508
22×18		457.2
22×16		406.4
22×14		355.6
24×22	609.6	558.8	508
24×20		508
24×18		457.2
24×16		406.4
26×24	660	610	610
26×22		559
26×20		508
26×18		457
28×26	711	660	610
28×24		610
28×20		508
28×18		457
30×28	762	711	610
30×26		660
30×24		610
30×20		508
32×30	813	762	610
32×28		711
32×26		660
32×24		610
34×32	864	813	610
34×30		762
34×26		660
342×4		610
36×34	914	864	610
36×32		713
36×30		762
36×26		660
36×24		610
38×36	965	914	610
38×34		864
38×32		813
38×30		762
38×28		711
38×26		660
40×38		965	610
40×36	1016	914
40×34		864
40×32		813
40×30		762
42×40		1016	610
42×38	1067	965
42×36		914
42×34		864
42×32		813
42×30		762
44×42	1118	1067	610
44×40		1016
44×38		965
44×36		914
46×44	1168	1118	711
46×42		1067
46×40		1016
46×38		965
48×46	1219	1168	711
48×44		1118
48×42		1067
48×40		1016