Description
Concentric Reducers (CR)
Concentric reducers are used to transition between pipes of the same diameter. They come in both steel and cast iron, and they can be found in a variety of sizes, including 2-inch, 3-inch, 4-inch and 6-inch. They are also known as male reducers because their outside diameter is larger than the inside diameter of their mating part (in this case a female adapter).
Eccentric Reducers (ER)
Eccentric reducers are used to transition between pipes of different diameters. The eccentric design allows for the joining of a pipe with an inside diameter that is larger than another.
Standard: ASME B16.9, DIN2615, JIS B2312, ASME B16.11
Material: Carbon Steel ASTM A234 WPB,
Alloy Steel ASTM A234 WP1, WP5, WP9, WP11, WP22
Stainless Steel ASTM A403 304/316
Types: Equal and Reducing
Size Range: 1/2″ to 24″
Wall thickness: Sch10, Sch40, Sch80
Pressure Rations: 3000#, 6000#, 9000#
Concentric Pipe Reducer and Eccentric Pipe Reducer Dimensions are covered in ASME B16.9. Refer to the table given below for the size 1/2″ to 24″.
Specification
Specification
|
NPS1
|
NPS2
|
OD1
|
OD2
|
H
|
|
3/4
|
1/2
|
26.7
|
21.3
|
38
|
|
3/4
|
3/8
|
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
|
42.2
|
26.7
|
51
|
|
1-1/4
|
1/2
|
42.2
|
21.3
|
51
|
|
1-1/2
|
1-1/4
|
48.3
|
42.2
|
64
|
|
1-1/2
|
1
|
48.3
|
33.4
|
64
|
|
1-1/2
|
3/4
|
48.3
|
26.7
|
64
|
|
1-1/2
|
1/2
|
48.3
|
21.3
|
64
|
|
2
|
1-1/2
|
60.3
|
48.3
|
76
|
|
2
|
1-1/4
|
60.3
|
42.2
|
76
|
|
2
|
1
|
60.3
|
33.4
|
76
|
|
2
|
3/4
|
60.3
|
26.7
|
76
|
|
NPS1
|
NPS2
|
OD1
|
OD2
|
H
|
|
2-1/2
|
2
|
73.0
|
60.3
|
89
|
|
2-1/2
|
1-1/2
|
73.0
|
48.3
|
89
|
|
2-1/2
|
1-1/4
|
73.0
|
42.2
|
89
|
|
2-1/2
|
1
|
73.0
|
33.4
|
89
|
|
3
|
2-1/2
|
88.9
|
73.0
|
89
|
|
3
|
2
|
88.9
|
60.3
|
89
|
|
3
|
1-1/2
|
88.9
|
48.3
|
89
|
|
3
|
1-1/4
|
88.9
|
42.2
|
89
|
|
3-1/2
|
3
|
101.6
|
88.9
|
102
|
|
3-1/2
|
2-1/2
|
101.6
|
73.0
|
102
|
|
3-1/2
|
2
|
101.6
|
60.3
|
102
|
|
3-1/2
|
1-1/2
|
101.6
|
48.3
|
102
|
|
3-1/2
|
1-1/4
|
101.6
|
42.2
|
102
|
|
4
|
3-1/2
|
114.3
|
101.6
|
102
|
|
4
|
3
|
114.3
|
88.9
|
102
|
|
NPS1
|
NPS2
|
OD1
|
OD2
|
H
|
|
4
|
2-1/2
|
114.3
|
73.0
|
102
|
|
4
|
2
|
114.3
|
60.3
|
102
|
|
4
|
1-1/2
|
114.3
|
48.3
|
102
|
|
5
|
4
|
141.3
|
114.3
|
127
|
|
5
|
3-1/2
|
141.3
|
101.6
|
127
|
|
5
|
3
|
141.3
|
88.9
|
127
|
|
5
|
2-1/2
|
141.3
|
73.0
|
127
|
|
5
|
2
|
141.3
|
60.3
|
127
|
|
6
|
5
|
168.3
|
141.3
|
140
|
|
6
|
4
|
168.3
|
114.3
|
140
|
|
6
|
3-1/2
|
168.3
|
101.6
|
140
|
|
6
|
3
|
168.3
|
88.9
|
140
|
|
6
|
2-1/2
|
168.3
|
73.0
|
140
|
|
8
|
6
|
219.1
|
168.3
|
152
|
|
8
|
5
|
219.1
|
141.3
|
152
|
|
NPS1
|
NPS2
|
OD1
|
OD2
|
H
|
|
8
|
4
|
219.1
|
114.3
|
152
|
|
8
|
3-1/2
|
219.1
|
101.6
|
152
|
|
10
|
8
|
273.0
|
219.1
|
178
|
|
10
|
6
|
273.0
|
168.3
|
178
|
|
10
|
5
|
273.0
|
141.3
|
178
|
|
10
|
4
|
273.0
|
114.3
|
178
|
|
12
|
10
|
323.8
|
273.0
|
203
|
|
12
|
8
|
323.8
|
219.1
|
203
|
|
12
|
6
|
323.8
|
168.3
|
203
|
|
12
|
5
|
323.8
|
141.3
|
203
|
|
14
|
12
|
355.6
|
323.8
|
330
|
|
14
|
10
|
355.6
|
273.0
|
330
|
|
14
|
8
|
355.6
|
219.1
|
330
|
|
14
|
6
|
355.6
|
168.3
|
330
|
|
16
|
14
|
406.4
|
355.6
|
356
|
|
NPS1
|
NPS2
|
OD1
|
OD2
|
H
|
|
16
|
12
|
406.4
|
323.8
|
356
|
|
16
|
10
|
406.4
|
273.0
|
356
|
|
16
|
8
|
406.4
|
219.1
|
356
|
|
18
|
16
|
457.0
|
406.4
|
381
|
|
18
|
14
|
457.0
|
355.6
|
381
|
|
18
|
12
|
457.0
|
323.8
|
381
|
|
18
|
10
|
457.0
|
273.0
|
381
|
|
20
|
18
|
508.0
|
457.0
|
508
|
|
20
|
16
|
508.0
|
406.4
|
508
|
|
20
|
14
|
508.0
|
355.6
|
508
|
|
20
|
12
|
508.0
|
323.8
|
508
|
|
22
|
20
|
559.0
|
508.0
|
508
|
|
22
|
18
|
559.0
|
457.0
|
508
|
|
22
|
16
|
559.0
|
406.4
|
508
|
|
22
|
14
|
559.0
|
355.4
|
508
|
|
NPS1
|
NPS2
|
OD1
|
OD2
|
H
|
|
24
|
22
|
610.0
|
559.0
|
508
|
|
24
|
20
|
610.0
|
508.0
|
508
|
|
24
|
18
|
610.0
|
457.0
|
508
|
|
24
|
16
|
610.0
|
406.4
|
508
|
|
26
|
24
|
660.0
|
610.0
|
610
|
|
26
|
22
|
660.0
|
559.0
|
610
|
|
26
|
20
|
660.0
|
508.0
|
610
|
|
26
|
18
|
660.0
|
457.0
|
610
|
|
28
|
26
|
711.0
|
660.0
|
610
|
|
28
|
24
|
711.0
|
610.0
|
610
|
|
28
|
20
|
711.0
|
508.0
|
610
|
|
28
|
18
|
711.0
|
457.0
|
610
|
|
30
|
28
|
762.0
|
711.0
|
610
|
|
30
|
26
|
762.0
|
660.0
|
610
|
|
30
|
24
|
762.0
|
610.0
|
610
|
|
NPS1
|
NPS2
|
OD1
|
OD2
|
H
|
|
30
|
20
|
762.0
|
508.0
|
610
|
|
32
|
30
|
813.0
|
762.0
|
610
|
|
32
|
28
|
813.0
|
711.0
|
610
|
|
32
|
26
|
813.0
|
660.0
|
610
|
|
32
|
24
|
813.0
|
610.0
|
610
|
|
34
|
32
|
864.0
|
813.0
|
610
|
|
34
|
30
|
864.0
|
762.0
|
610
|
|
34
|
26
|
864.0
|
660.0
|
610
|
|
34
|
24
|
864.0
|
610.0
|
610
|
|
36
|
34
|
914.0
|
864.0
|
610
|
|
36
|
32
|
914.0
|
813.0
|
610
|
|
36
|
30
|
914.0
|
762.0
|
610
|
|
36
|
26
|
914.0
|
660.0
|
610
|
|
36
|
24
|
914.0
|
610.0
|
610
|
|
38
|
36
|
965.0
|
914.0
|
610
|
|
NPS1
|
NPS2
|
OD1
|
OD2
|
H
|
|
38
|
34
|
965.0
|
864.0
|
610
|
|
38
|
32
|
965.0
|
813.0
|
610
|
|
38
|
30
|
965.0
|
762.0
|
610
|
|
38
|
28
|
965.0
|
711.0
|
610
|
|
38
|
26
|
965.0
|
660.0
|
610
|
|
40
|
38
|
1016.0
|
965.0
|
610
|
|
40
|
36
|
1016.0
|
914.0
|
610
|
|
40
|
34
|
1016.0
|
864.0
|
610
|
|
40
|
32
|
1016.0
|
813.0
|
610
|
|
40
|
30
|
1016.0
|
762.0
|
610
|
|
42
|
40
|
1067.0
|
1016.0
|
610
|
|
42
|
38
|
1067.0
|
965.0
|
610
|
|
42
|
36
|
1067.0
|
914.0
|
610
|
|
42
|
34
|
1067.0
|
864.0
|
610
|
|
42
|
32
|
1067.0
|
813.0
|
610
|
|
NPS1
|
NPS2
|
OD1
|
OD2
|
H
|
|
42
|
30
|
1067.0
|
762.0
|
610
|
|
44
|
42
|
1118.0
|
1067.0
|
610
|
|
44
|
40
|
1118.0
|
1016.0
|
610
|
|
44
|
38
|
1118.0
|
965.0
|
610
|
|
44
|
36
|
1118.0
|
914.0
|
610
|
|
46
|
44
|
1168.0
|
1118.0
|
711
|
|
46
|
42
|
1168.0
|
1067.0
|
711
|
|
46
|
40
|
1168.0
|
1016.0
|
711
|
|
46
|
38
|
1168.0
|
965.0
|
711
|
|
48
|
46
|
1219.0
|
1168.0
|
711
|
|
48
|
44
|
1219.0
|
1118.0
|
711
|
|
48
|
42
|
1219.0
|
1067.0
|
711
|
|
48
|
40
|
1219.0
|
1016.0
|
711
|
|
NPS1
|
NPS2
|
OD1
|
OD2
|
H
|
Standard
Stainless Steel Reducer : ASTM A403 WP Gr. 304, 304H, 309, 310, 316, 316L, 317L, 321, 347, 904L.
Carbon Steel Reducer : ASTM A 234 WPB , WPBW, WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65 & WPHY 70.
Low Temperature Carbon Steel Reducer : ASTM A420 WPL3, A420 WPL6.
Alloy Steel Reducer : ASTM / ASME A/SA 234 Gr. WP 1, WP 5, WP 9, WP 11, WP 12, WP 22, WP 91.
Duplex Steel Reducer : ASTM A 815, ASME SA 815 UNS NO S31803, S32205. Werkstoff No. 1.4462.
Titanium Alloy Reducer : ASTM B363 WPT2, WPT3, WPT7, WPT9, WPT11
Nickel Alloy Reducer : ASTM / ASME SB 336 UNS 2200 ( NICKEL 200 ), UNS 2201 (NICKEL 201 ), UNS 4400 (MONEL 400 ), UNS 8020 ( ALLOY 20 / 20 CB 3, UNS 8825 INCONEL (825), UNS 6600 (INCONEL 600 ), UNS 6601 ( INCONEL 601 ), UNS 6625 (INCONEL 625), UNS 10276 ( HASTELLOY C 276).
Copper Alloy Reducer: ASTM / ASME SB 111 UNS NO. C 10100 , C 10200 , C 10300 , C 10800 , C 12000, C 12200, C 70600 C 71500, ASTM / ASME SB 466 UNS NO. C 70600 ( CU -NI- 90/10) , C 71500 ( CU -NI- 70/30)
Process
Packing
Standard
Stainless Steel Reducer : ASTM A403 WP Gr. 304, 304H, 309, 310, 316, 316L, 317L, 321, 347, 904L.
Carbon Steel Reducer : ASTM A 234 WPB , WPBW, WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65 & WPHY 70.
Low Temperature Carbon Steel Reducer : ASTM A420 WPL3, A420 WPL6.
Alloy Steel Reducer : ASTM / ASME A/SA 234 Gr. WP 1, WP 5, WP 9, WP 11, WP 12, WP 22, WP 91.
Duplex Steel Reducer : ASTM A 815, ASME SA 815 UNS NO S31803, S32205. Werkstoff No. 1.4462.
Titanium Alloy Reducer : ASTM B363 WPT2, WPT3, WPT7, WPT9, WPT11
Nickel Alloy Reducer : ASTM / ASME SB 336 UNS 2200 ( NICKEL 200 ), UNS 2201 (NICKEL 201 ), UNS 4400 (MONEL 400 ), UNS 8020 ( ALLOY 20 / 20 CB 3, UNS 8825 INCONEL (825), UNS 6600 (INCONEL 600 ), UNS 6601 ( INCONEL 601 ), UNS 6625 (INCONEL 625), UNS 10276 ( HASTELLOY C 276).
Copper Alloy Reducer: ASTM / ASME SB 111 UNS NO. C 10100 , C 10200 , C 10300 , C 10800 , C 12000, C 12200, C 70600 C 71500, ASTM / ASME SB 466 UNS NO. C 70600 ( CU -NI- 90/10) , C 71500 ( CU -NI- 70/30)
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