Butt-Welding Concentric and Eccentric Reducer
Pipe Reducer is a kind of industrial pipe fittings used to connect two pipes (or tubes) of different diameters.
It contains concentric reducer and eccentric reducer. The former is used on vertical pipes, and the latter is used for horizontal pipes.
Pipe reducers are mainly used in the following areas:
1. Pipe reducer is useful when there is a requirement on change of fluid flow rate.
2. It is used for pump inlet to prevent cavitation.
3. It is fit for the connectors of instruments, such as flowmeter and control valve.
Materials
Carbon steel: ASTM/ASME A234 WPB-WPC
Alloy steel: ASTM/ASME A234 WP 1-WP 12-WP 11-WP 22-WP 5-WP 91-WP 911
Stainless steel: ASTM/ASME A403 WP 304-304L-304H-304LN-304N
ASTM/ASME A403 WP 316-316L-316H-316LN-316N-316Ti
ASTM/ASME A403 WP 321-321H ASTM/ASME A403 WP 347-347H
Low temperature steel: ASTM/ASME A402 WPL 3-WPL 6
High performance steel: ASTM/ASME A860 WPHY 42-46-52-60-65-70
Standards
GB/T12459-2005 GB/T13401-2005 GB/T10752-2005 SH/T3408-1996 SH/T3409-1996
SY/T0609-2006 SY/T0518-2002 SY/T0510-1998 DL/T695-1999 GD2000 GD87-1101
HG/T21635-1987 HG/T21631-1990 ASME B16.9-2007 ASME B16.25-2007
MSS SP 75-2008 MSS SP 43-2008 CSA Z245.11-05-2005
EN10253-1-1999 EN10253-2-2007 EN10253-3-2008 EN10253-4-2008
DIN2616-1-1991 DIN2616-2-1991BS1640-1-1962 BS1640-2-1962 BS1640-3-1968 BS1640-4-1968 BS1965-1-1963
GOST17378-2001 AFNOR NF A 49-289-1990 AFNOR NF A 49-170-1-1999 AFNOR NF A 49-170-2-2009 AFNOR NF A 49-170-3-2009 AFNOR NF A 49-170-4-2009 ISO3419-1981 ISO5251-1981 JIS B2311-2009 JIS B2312-2009 JIS B2313-2009
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Nominal Pipe Size
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End to End
|
|
DN
|
NPS
|
L
|
|
20×15
20×10
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3/4×1/2
3/4×3/8
|
38
|
|
25×20
25×15
|
1×3/4
1×1/2
|
51
|
|
32×25
32×20
32×15
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11/4×1
11/4×3/4
11/4×1/2
|
51
|
|
40×32
40×25
40×20
40×15
|
11/2×11/4
11/2×1
11/2×3/4
11/2×1/2
|
64
|
|
50×40
50×32
50×25
50×20
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2×11/2
2×11/4
2×1
2×3/4
|
76
|
|
65×50
65×40
65×32
65×25
|
21/2×2
21/2×11/2
21/2×11/4
21/2×1
|
89
|
|
80×65
80×50
80×40
80×32
|
3×21/2
3×2
3×11/2
3×11/4
|
89
|
|
90×80
90×65
90×50
90×40
90×32
|
31/2×3
31/2×21/2
31/2×2
31/2×11/2
31/2×11/4
|
102
|
|
100×90
100×80
100×65
100×50
100×40
|
4×31/2
4×3
4×21/2
4×2
4×11/2
|
102
|
|
125×100
125×90
125×80
125×65
125×50
|
5×4
5×31/2
5×3
5×21/2
5×2
|
127
|
|
150×125
150×100
150×90
150×80
150×65
|
6×5
6×4
6×31/2
6×3
6×21/2
|
140
|
|
200×150
200×125
200×100
200×90
|
8×6
8×5
8×4
8×31/2
|
152
|
|
250×200
250×150
250×125
250×100
|
10×8
10×6
10×5
10×4
|
178
|
|
300×250
300×200
300×150
300×125
|
12×10
12×8
12×6
12×5
|
203
|
|
350×300
350×250
350×200
350×150
|
14×12
14×10
14×8
14×6
|
330
|
|
400×350
400×300
400×250
440×200
|
16×14
16×12
16×10
16×8
|
356
|
|
450×400
450×350
450×300
450×250
|
18×16
18×14
18×12
18×10
|
381
|
|
500×450
500×400
500×350
500×300
|
20×18
20×16
20×14
20×12
|
508
|
|
550×500
550×450
550×400
550×350
|
22×20
22×18
22×16
22×14
|
508
|
|
|
Nominal Pipe Size
|
End to End
|
|
DN
|
NPS
|
L
|
|
600×550
600×500
600×450
600×400
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24×22
24×20
24×18
24×16
|
508
|
|
650×600
650×550
650×500
650×450
|
26×24
26×22
26×20
26×18
|
610
|
|
700×650
700×600
700×550
700×500
|
28×26
28×24
28×22
28×20
|
610
|
|
750×700
750×650
750×600
750×550
|
30×28
30×26
30×24
30×22
|
610
|
|
800×750
800×700
800×650
800×600
|
32×30
32×28
32×26
32×24
|
610
|
|
850×800
850×750
850×700
850×650
|
34×32
34×30
34×28
34×26
|
610
|
|
900×850
900×800
900×750
900×700
900×650
|
36×34
36×32
36×30
36×28
36×26
|
610
|
|
950×900
950×850
950×800
950×750
950×700
950×650
|
38×36
38×34
38×32
38×30
38×28
38×26
|
610
|
|
1000×950
1000×900
1000×850
1000×800
1000×750
|
40×38
40×36
40×34
40×32
40×30
|
610
|
|
1050×1000
1050×950
1050×900
1050×850
1050×800
1050×750
|
42×40
42×38
42×36
42×34
42×32
42×30
|
610
|
|
1100×1050
1100×1000
1100×950
1100×900
|
44×42
44×40
44×38
44×36
|
610
|
|
1150×1100
1150×1050
1150×1000
1150×950
|
46×44
46×42
46×40
46×38
|
711
|
|
1200×1150
1200×1100
1200×1050
1200×1000
|
48×46
48×44
48×42
48×40
|
711
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|
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