ASME B16.9 Reducer

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ASME B16.9 Reducer are availbale in various forms and size, products like Elbows,Tee, Cross and educers etc.Buttweld fittings dimensions, dimensional tolerances are defined in the ASME B16.9 standards. Light-weight corrosion resistant fittings are made to MSS SP43. ASME B 16.9 Reducers Pipe Fittings standard covers pressure-temperature ratings, materials, dimensions, tolerances,marking, testing, and methods of designating openings for fittings.

stainless-steel-buttweld-reducer
ASME B16.9 Reducer

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ASME B16.9 Reducer Specification

Specifications List ASME B16.9 Reducer
Eccentric Reducers Uses ASME B16.9 Stainless Steel Eccentric Reducer reduces the pipes from the side.
Concentric Reducers Uses ASME B16.9 Stainless Steel Concentric Reducer have a cone shape that decreases gradually around the pipe.
Dimensions MSS SP-75
BS 4825
JIS B2313
EN 10253-2
EN 10253-4
JIS B2312
Size NPS 2" To NPS 48"
Methods ButtWeld/ Welded/ Seamless
Pressure Rating Class 150 To Class 600
Types Of Reducer Concentric And Eccentric
Schedule SCH 5S/ SCH 10s/ SCH 20S/ SCH 40/ SCH 80

Carbon Steel Reducer Sizes

ss-reducer-size-chart

Copper Reducer Dimensions

copper-reducer-dimensions

Stainless Steel 304 Reducer Chemical Composition

Grade Name Stainless Steel 304 Reducer
Si - 2.0
Ni 8.0 10.5
N - 0.10
P - 0.75
S - 0.045
Mo 18.0 20.0
C min. & max.
Mn - 0.08
Cr - 0.030

Stainless Steel Reducer Grades

astm-a403-304-pipe-fittings
Stainless Steel 304 Pipe Fittings
astm-a403-304l-pipe-fittings
Stainless Steel 304L Pipe Fittings
astm-a403-316-pipe-fittings
Stainless Steel 316 Pipe Fittings
astm-a403-316l-pipe-fittings
Stainless Steel 316L Pipe Fittings
astm-a403-316ti-pipe-fittings
Stainless Steel 316Ti Pipe Fittings
astm-a403-347h-pipe-fittings
Stainless Steel 347H Pipe Fittings
astm-a403-410-pipe-fittings
Stainless Steel 410 Pipe Fittings
astm-a403-904l-pipe-fittings.jpg
Stainless Steel 904L Pipe Fittings

ASME B16.9 Reducer Dimensions

stainless-steel-reducer-dimensions

ASME B16.9 Concentric Reducers Dimensions

Code Of RCD Reiso (BIG) Ø (SMALL) Ø Hight (H) In Millmeter Weight Of Theoretical In Kilogram
(DN) D In Millmeter (S) Thickness In MM (DN) D Millmeter (S) Thickness In MM
27 21 3/4 26.9 2.3 1/2 21.3 2.0 38 0.08
33 21 1 33.7 2.6 1/2 21.3 2.0 50 0.09
33 27 3/4 26.9 2.3 0.09
42 21 1"1/4 42.4 2.6 1/2 21.3 2.0 50 0.12
42 27 3/4 26.9 2.3 0.13
42 33 1 33.7 2.6 0.14
*48 21 1"1/2 48.3 2.6 1/2 21.3 2.0 64 0.18
48 27 3/4 26.9 2.3 0.19
48 33 1 33.7 2.6 0.20
48 42 1"1/4 42.4 2.6 0.20
60 27 2 60.3 2.9 3/4 26.9 2.3 76 0.30
60 33 1 33.7 2.6 0.31
60 42 1"1/4 42.4 2.6 0.32
60 48 1"1/2 48.3 2.6 0.33
76 33 2"1/2 76.1 2.9 1 33.7 2.6 90 0.40
76 42 1"1/4 42.4 2.6 0.47
76 48 1"1/2 48.3 2.6 0.48
76 60 2 60.3 2.6 0.49
89 42 3 88.9 3.2 1"1/4 42.4 2.6 90 0.55
89 48 1"1/2 48.3 2.6 0.61
89 60 2 60.3 2.9 0.62
89 76 2"1/2 76.1 2.9 0.63
114 48 4 114.3 3.6 1"1/2 48.3 2.6 100 0.85
114 60 2 60.3 2.9 0.98
114 76 2"1/2 76.1 2.9 1.00
114 89 3 88.9 3.2 1.02
139 60 5 139.7 4.0 2 60.3 2.9 127 1.60
139 76 2"1/2 76.1 2.9 1.70
139 89 3 88.9 3.2 1.74
139 114 4 114.3 3.6 1.76
*168 76 6 168.3 4.5 2"1/2 76.1 2.9 140 2.60
168 89 3 88.9 3.2 2.70
168 114 4 114.3 3.6 2.82
168 139 5 139.7 4.0 2.94
219 114 8 219.1 6.3 4 114.3 3.6 152 5.03
219 139 5 139.7 4.0 5.12
219 168 6 168.3 4.5 5.18
*273 114 10 273.0 6.3 4 114.3 3.6 178 7.00
*273 139 5 139.7 4.0 7.20
273 168 6 168.3 4.5 7.40
273 219 8 219.1 6.3 7.55
323 168 12 323.9 7.1 6 168.3 4.5 203 11.00
323 219 8 219.1 6.3 11.10
323 273 10 273 6.3 11.20

ASME B16.9 Eccentric Reducer Dimensions

stainless-steel-eccentric-reducer-dimensions
Code Of RCD REISO Ø (BIG) Ø (SMALL) Hight In (MM) Weight Of Theoretical In KG
(DN) D In MM (S) Thickness In MM (DN) (D) In Millimeter (S) Thickness In MM
27 21 3/4 26.9 2.3 1/2 21.3 2.0 38 0.08
33 21 1 33.7 2.6 1/2 21.3 2.0 50 0.09
33 27 3/4 26.9 2.3 0.09
42 21 1″1/4 42.4 2.6 1/2 21.3 2.0 50 0.12
42 27 3/4 26.9 2.3 0.13
42 33 1 33.7 2.6 0.14
*48 21 1″1/2 48.3 2.6 1/2 21.3 2.0 64 0.18
48 27 3/4 26.9 2.3 0.19
48 33 1 33.7 2.6 0.20
48 42 1″1/4 42.4 2.6 0.20
60 27 2 60.3 2.9 3/4 26.9 2.3 76 0.30
60 33 1 33.7 2.6 0.31
60 42 1″1/4 42.4 2.6 0.32
60 48 1″1/2 48.3 2.6 0.33
76 33 2″1/2 76.1 2.9 1 33.7 2.6 90 0.40
76 42 1″1/4 42.4 2.6 0.47
76 48 1″1/2 48.3 2.6 0.48
76 60 2 60.3 2.6 0.49
89 42 3 88.9 3.2 1″1/4 42.4 2.6 90 0.55
89 48 1″1/2 48.3 2.6 0.61
89 60 2 60.3 2.9 0.62
89 76 2″1/2 76.1 2.9 0.63
114 48 4 114.3 3.6 1″1/2 48.3 2.6 100 0.85
114 60 2 60.3 2.9 0.98
114 76 2″1/2 76.1 2.9 1.00
114 89 3 88.9 3.2 1.02
139 60 5 139.7 4.0 2 60.3 2.9 127 1.60
139 76 2″1/2 76.1 2.9 1.70
139 89 3 88.9 3.2 1.74
139 114 4 114.3 3.6 1.76
*168 76 6 168.3 4.5 2″1/2 76.1 2.9 140 2.60
168 89 3 88.9 3.2 2.70
168 114 4 114.3 3.6 2.82
168 139 5 139.7 4.0 2.94
219 114 8 219.1 6.3 4 114.3 3.6 152 5.03
219 139 5 139.7 4.0 5.12
219 168 6 168.3 4.5 5.18
*273 114 10 273.0 6.3 4 114.3 3.6 178 7.00
*273 139 5 139.7 4.0 7.20
273 168 6 168.3 4.5 7.40
273 219 8 219.1 6.3 7.55
323 168 12 323.9 7.1 6 168.3 4.5 203 11.00
323 219 8 219.1 6.3 11.10
323 273 10 273 6.3 11.20

Types Of Buttweld Reducer

con-reducer
ASME B16.9 Concentric Reducers
concentric-pipe-reducer
Buttweld Concentric Reducers
aluminum-concentric-reducer
Aluminum Concentric Reducers
grooved-concentric-reducer
Grooved Concentric Reducers
carbon-steel-concentric-reducer
Carbon Steel Concentric Reducers
copper-concentric-reducer
Copper Concentric Reducers
mild-steel-eccentric-reducer
Mild Steel Eccentric Reducers
grooved-eccentric-reducer
ASME B16.9 Eccentric Reducers
ductile-iron-eccentric-reducer
Ductile Iron Eccentric Reducers
ecc-reducer
Stainless Steel Eccentric Reducers
carbon-steel-eccentric-reducer
Carbon Steel Eccentric Reducers
stainless-steel-reducer-fitting
Stainless Steel Reducer Fittings
6-4-eccentric-reducer
Reducer SS 304
ss-pipe-reducer
SS Pipe Reducer
ss-concentric-reducer
SS Concentric Reducer
ss-304-reducer
SS 304 Reducer

SCH 40/ STD Buttweld Concentric Reducer Weight

Size (in) Approx Weight In (lbs)
3/4 x 1/2 0.21
1 x 1/2 0.36
1 x 3/4 0.36
1-1/4 x 1/2 0.42
1-1/4 x 3/4 0.42
1-1/4 x 1 0.48
1-1/2 x 1/2 0.56
1-1/2 x 3/4 0.56
1-1/2 x 1 0.57
1-1/2 x 1-1/4 0.65
2 x 1/2 0.74
2 x 3/4 0.74
2 x 1 0.81
2 x 1-1/4 0.88
2 x 1-1/2 0.94
2-1/2 x 1 1.3
2-1/2 x 1-1/4 1.4
2-1/2 x 1-1/2 1.5
2-1/2 x 2 1.6
3 x 1 1.7
3 x 1-1/4 1.8
3 x 1-1/2 1.9
3 x 2 2
3 x 2-1/2 2.2
3-1/2 x 1-1/4 2.5
3-1/2 x 1-1/2 2.6
3-1/2 x 2 2.6

Carbon Steel Butt Weld Pipe Reducer Application

  • Hydraulic system
  • Pneumatic system
  • Pharmaceutical fittings
  • Air brake fittings
  • Gas fittings
  • Refrigerant fittings

ANSI B16 9 Reducer Tolerance

Dimensional Tolerances of ASME B16.9 Concentric and Eccentric Reducer
Nominal Size Of Pipe 1/2 to 2.1/2 3 to 3.1/2 4 5 to 8
Outer Diameter (O.D.)
at Bevel (D)		 + 1.6
- 0.8		 1.6 1.6 + 2.4
- 1.6
Inner Diameter (I.D.) at End 0.8 1.6 1.6 1.6
Overall Length Of (H) 2 2 2 2
Nominal Size Of Pipe 10 to 18 20 to 24 26 to 30 32 to 48
Outer Diameter (O.D.)
at Bevel (D)		 + 4
- 3.2		 + 6.4
- 4.8		 + 6.4
- 4.8		 + 6.4
- 4.8
Inner Diameter (I.D.) at End 3.2 4.8 + 6.4
- 4.8		 + 6.4
- 4.8
Overall Length Of (H) 2 2 5 5
Wall Thickness (W.T.) (t) Nominal Wall Thickness Not less than 87.5%

DIN 2616 Reducer Dimensions

din-2616-reducer-dimensions
- (DN1) (d1) (s1) (s1) (s1) (DN2) (d2) (a/°) (s2) (s2) (s2) (s3) (s3) (s3)
- 15 21.3 2.0 3.2 4.0 10 17.2 6 1.8 2.9 - 2.0 3.2 -
- 20 26.9 2.3 3.2 4.0 15 21.3 8 2.0 3.2 4.0 2.3 3.2 4.0
- 10 17.2 12 1.8 2.9 - 2.3 3.2 -
- 25 33.7 2.6 3.2 4.0 20 26.9 7 2.3 3.2 4.0 2.6 3.2 4.0
- 15 21.3 12 2.0 3.2 4.0 2.6 3.2 4.0
- 32 42.4 2.6 3.6 4.0 25 33.7 9 2.6 3.2 4.0 2.6 3.6 4.0
- 20 26.9 15 2.3 3.2 4.0 2.6 3.6 4.0
- 15 21.3 19 2.0 3.2 4.0 2.6 3.6 4.0
- 40 48.3 2.6 4.0 5.0 32 42.4 6 2.6 3.6 4.0 2.6 4.0 5.0
- 25 33.7 10 2.6 3.2 4.0 2.6 4.0 5.0
- 20 26.9 16 2.3 3.2 4.0 2.6 4.0 5.0
- 50 60.3 2.9 4.5 5.6 40 48.3 7 2.6 4.0 5.0 2.9 4.5 5.6
- 32 42.4 11 2.6 3.6 4.0 2.9 4.5 5.6
- 25 33.7 16 2.6 3.2 4.0 2.9 4.5 5.6
- 20 26.9 21 2.3 3.2 4.0 2.9 4.5 5.6
- 65 76.1 2.9 5.0 7.1 50 60.3 9 2.9 4.5 5.6 2.9 5.0 7.1
- 40 48.3 15 2.6 4.0 5.0 2.9 5.0 7.1
- 32 42.4 18 2.6 3.6 4.0 2.9 5.0 7.1
- 25 33.7 23 2.6 3.2 4.0 2.9 5.0 7.1
- 80 88.9 3.2 5.6 8.0 65 76.1 7 2.9 5.0 7.1 3.2 5.6 8.0
- 50 60.3 16 2.9 4.5 5.6 3.2 5.6 8.0
- 40 48.3 22 2.6 4.0 5.0 3.2 5.6 8.0
- 32 42.4 26 2.6 3.6 4.0 3.2 5.6 8.0
- 100 114.3 3.6 6.3 8.8 80 88.9 13 3.2 5.6 8.0 3.6 6.3 8.8
- 65 76.1 18 2.9 5.0 7.1 3.6 6.3 8.8
- 50 60.3 26 2.9 4.5 5.6 3.6 6.3 8.8
- 40 48.3 31 2.6 4.0 5.0 3.6 6.3 8.8
- 125 139.7 4.0 6.3 10.0 100 114.3 10 3.6 6.3 8.8 4.0 6.3 10.0
- 80 88.9 20 3.2 5.6 8.0 4.0 6.3 10.0
- 65 76.1 25 2.9 5.0 7.1 4.0 6.3 10.0
- 50 60.3 30 2.9 4.5 5.6 4.0 6.3 10.0
- 150 168.3 4.5 7.1 11.0 125 139.7 9 4.0 6.3 10.0 4.5 7.1 11.0
- 100 114.3 19 3.6 6.3 8.8 4.5 7.1 11.0
- 80 88.9 27 3.2 5.6 8.0 4.5 7.1 11.0
- 65 76.1 31 2.9 5.0 7.1 4.5 7.1 11.0
- 200 219.1 6.3 8.0 12.5 150 168.3 18 4.5 7.1 11.0 6.3 8.0 12.5
- 125 139.7 27 4.0 6.3 10.0 6.3 8.0 12.5
- 100 114.3 33 3.6 6.3 8.8 6.3 8.0 12.5
- 80 88.9 39 3.2 5.6 8.0 6.3 8.0 12.5
- 250 273.0 6.3 8.8 14.2 200 219.1 16 6.3 8.0 12.5 6.3 8.8 14.2
- 150 168.3 30 4.5 7.1 11.0 6.3 8.8 14.2
- 125 139.7 36 4.0 6.3 10.0 6.3 8.8 14.2
- 100 114.3 40 3.6 6.3 8.8 6.3 8.8 14.2
- 300 323.9 7.1 10.0 16.0 250 273.0 12 6.3 8.8 14.2 7.1 10.0 16.0
- 200 219.1 24 6.3 8.0 12.5 7.1 10.0 16.0
- 150 168.3 35 4.5 7.1 11.0 7.1 10.0 16.0
- 125 139.7 40 4.0 6.3 10.0 7.1 10.0 16.0

DIN 11851 Reducer Dimensions

Sizes Of Stainless Steel Reducers In (mm) (Inner Daimeter) In (mm)

(Outside Daimeter) In (mm)

 ASME B16.9 Reducers Height In (mm) Carbon Steel Reducers Radius In (mm)
(DN10) 12 20 4.5 2.3
(DN15) 18 26 4.5 2.3
(DN20) 23 33 4.5 2.8
(DN25) 30 40 5 2.8
(DN32) 36 46 5 2.8
(DN40) 42 52 5 2.8
(DN50) 54 64 5 2.8
(DN65) 71 81 5 2.8
(DN80) 85 95 5 2.8
(DN100) 104 114 6 2.8
(DN125) 130 142 7 3.5
(DN150) 155 167 7 3.5

JIS B2312 Reducer Dimensions

JIS B2312 Reducers Size D1 JIS B2312 Reducers Sizes D2
DN Size Of Steel Pipe Outer Daimeter in (mm)
20 3/4" 27.2 DN 15
25 1" 34.0 DN 20/ DN 15
32 1-1/4" 42.7 DN 25/ DN 15
40 1-1/2" 48.6 DN 32/ DN 15
50 2" 60.5 DN 40/DN 32
65 2-1/2" 76.3 DN 32/DN 40
80 3" 89.1 DN 40/DN 50
90 3-1/2" 101.6 DN 50/DN 40/DN 80
100 4" 114.3 DN 50/DN 40/ DN 90

Concentric Reducer Surface Area Formula

concentric-reducer-surface-area-formula

8 X 6 Concentric Reducer Weight

NPS Of Stainless Steel Concentric Reducers ASME B16.9 Reducers Weight In (LBS) Weight In Kilogram
3/4-1/2 0.17 0.08
3/4-3/8 0.15 0.07
1-3/4 0.4 0.18
1-1/2 0.4 0.18
1.1/4-1 0.5 0.23
1.1/4-3/4 0.4 0.18
1.1/4-1/2 0.4 0.18
1.1/2-1.1/4 0.7 0.32
1.1/2-1 0.62 0.28
1.1/2-3/4 0.54 0.24
1.1/2-1/2 0.5 0.23
2-1.1/2 0.9 0.41
2-1.1/4 0.84 0.38
2-1 0.76 0.34
2-3/4 0.7 0.32
2.1/2-2 1.5 0.68
2.1/2-1.1/2 1.38 0.63
2.1/2-1.1/4 1.25 0.57
2.1/2-1 1.25 0.57
3-2.1/2 2 0.91
3-2 1.8 0.82
3-1.1/2 1.7 0.77
3-1.1/4 1.6 0.73
3.1/2-3 3.15 1.43
3.1/2-2.1/2 2.88 1.31
3.1/2-2 2.75 1.25
3.1/2-1.1/2 2.5 1.13
3.1/2-1.1/4 2.4 1.09
4-3.1/2 3.5 1.59
4-3 3.38 1.53
4-2.1/2 3.25 1.47
4-2 3 1.36
4-1.1/2 2.88 1.31
5-4 6 2.72
5-3.1/2 5.75 2.61
5-3 5.5 2.49
5-2.1/2 5.25 2.38
5-2 5 2.27
6-5 8.5 3.86
6-4 8.25 3.74
6-3.1/2 8.25 3.74
6-3 8 3.63
6-2.1/2 7.25 3.29
8-6 13.2 5.99
8-5 12 5.44
8-4 11 4.99
8-3.1/2 11 4.99
10-8 22 9.98
10-6 21.5 9.75
10-5 21 9.53
10-4 20 9.07
12-10 34 15.42
12-8 32 14.51
12-6 31 14.06
12-5 30 13.61
14-12 60 27.22
14-10 59.2 26.85
14-8 58.5 26.54
14-6 58 26.31
16-14 71 32.21
16-12 70 31.75
16-10 69.5 31.52
16-8 68.5 31.07
16-6 - -
18-16 85 38.56
18-14 84 38.1
18-12 83 37.65
18-10 82 37.19
18-8 - -
20-18 125 56.7
20-16 124 56.25
20-14 122 55.34
20-12 120 54.43
20-10 - -
20-8 - -
22-20 142 64.41
22-18 138 62.6
22-16 131 59.42
22-14 123 55.79
22-12 - -
22-10 - -
24-22 - -
24-20 150 68.04
24-18 148 67.13
24-16 145 65.77
24-14 - -
24-12 - -
24-10 - -
26-24 207 93.89
26-22 200 90.72
26-20 190 86.18
26-18 182 82.55
26-16 - -
26-14 - -
26-12 - -
28-26 224 101.6
28-24 216 97.98
28-22 210 95.25
28-20 199 90.26
30-28 241 109.32
30-26 232 105.23
30-24 224 101.6
30-22 220 99.79
30-20 220 99.79
NPS LBS KG

Concentric Reducer Pressure Rating

ASME B16.9 Pressure Ratings
Stainless Steel Reducers Temperature Ratings Types Of Pressure Ratings Class
Class 150# Class 300#
1/4 - 1 (Inch) 1 1/4 - 2 (Inch) 2 1/2 - 3 (Inch)
(oF) (oC)
-20 to 150 -29 to 66 300 2000 1500 1000
200 93 265 1785 1350 910
250 121 225 1575 1200 825
300 149 185 1360 1050 735
350 177 150 1150 900 650
400 204 - 935 750 560
450 232 - 725 600 475
500 260 - 510 450 385
550 288 - 300 300 300

ASME B16.9 Reducer Thickness

Normal Size Of Steel Pipe Pipe Sch No. Weight In Kilogram (Small) Inner Daimeter (Small) Thickness (Large) Outer Daimeter (Large) Inner Daimeter (Large) Thickness (Small) Outer Daimeter Length Of Con Reducer
12 x 4 40 35.8 4.026 0.237 12.75 11.938 0.406 4.5 8
16 x 6 40 96.5 6.06 0.28 16 15 0.5 6.62 14
18 x 8 40 131 7.976 0.322 18 16.876 0.562 8.62 15
20 x 10 40 205 10.02 0.365 20 18.812 0.594 10.75 20
20 x 8 40 205 7.976 0.322 20 18.812 0.594 8.62 20
24 x 10 40 285 10.02 0.365 24 22.624 0.688 10.75 20
24 x 12 40 285 11.938 0.406 24 22.624 0.688 12.75 20
24 x 14 40 285 13.124 0.438 24 22.624 0.688 14 20
12 x 10 40 35.8 10.02 0.365 12.75 11.938 0.406 10.75 8
12 x 5 40 35.8 5.044 0.258 12.75 11.938 0.406 5.56 8
12 x 6 40 35.8 6.06 0.28 12.75 11.938 0.406 6.62 8
12 x 8 40 35.8 7.976 0.322 12.75 11.938 0.406 8.62 8
14 x 10 40 68.6 10.02 0.365 14 13.124 0.438 10.75 13
14 x 12 40 68.6 11.938 0.406 14 13.124 0.438 12.75 13
14 x 6 40 68.6 6.06 0.28 14 13.124 0.438 6.62 13
14 x 8 40 68.6 7.976 0.322 14 13.124 0.438 8.62 13
16 x 10 40 96.5 10.02 0.365 16 15 0.5 10.75 14
16 x 12 40 96.5 11.938 0.406 16 15 0.5 12.75 14
16 x 14 40 96.5 13.124 0.438 16 15 0.5 14 14
16 x 8 40 96.5 7.976 0.322 16 15 0.5 8.62 14
18 x 10 40 131 10.02 0.365 18 16.876 0.562 10.75 15
18 x 12 40 131 11.938 0.406 18 16.876 0.562 12.75 15
18 x 14 40 131 13.124 0.438 18 16.876 0.562 14 15
18 x 16 40 131 15 0.5 18 16.876 0.562 16 15
20 x 12 40 205 11.938 0.406 20 18.812 0.594 12.75 20
20 x 14 40 205 13.124 0.438 20 18.812 0.594 14 20
20 x 16 40 205 15 0.5 20 18.812 0.594 16 20
20 x 18 40 205 16.876 0.562 20 18.812 0.594 18 20
24 x 16 40 285 15 0.5 24 22.624 0.688 16 20
24 x 18 40 285 16.876 0.562 24 22.624 0.688 18 20
24 x 20 40 285 18.812 0.594 24 22.624 0.688 20 20
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