Pipe reducers

Pipe Reducers are the component in a pipeline that reduces the pipe size from a larger to a smaller bore (inner diameter).

Pipe reducers can be in various shapes.

We produce pipe creducer include oncentric reducers, eccentric Reducers, seamless or welded, with dimensions and tolerances according to Asme/Ansi B16.9 and EN 10253-4

Concentric reducer
Concentric reducer
A concentric reducer is used to join pipe sections or tube sections on the same axis.
Eccentric reducer
Eccentric reducer
Concentric reducer is a kind of fitting that be used for reducing piping size.
Stainless reducer
Stainless reducer
Stainless reducer is a kind of fitting that be made by stainless steel.
ASTM A234 WPB Concentric Reducer
ASTM A234 WPB
ASTM A234 WPB Concentric Reducers are used for connecting pipes of different diameters...
ANSI B16.9 ASTM A234 WPB Eccentric Reducer
ANSI B16.9 Reducer
Reducer with A234 WPB and 1/2 to 56-inch Size (DN15 to DN1400)
Large size eccentric reducer
Large size eccentric reducer
are used for connecting pipes of different diameters and find wide applications in construction industries...
Key Specifications/Special Features of pipe reducer, reducer fittings:

Standard: ANSI B16.9 / 16.28, ASTM A53/A106, API 5L, ASME B36.10M---1996, DIN2605 / 2615 / 2616, JIS P2311/2312

Surface treatment: Transparent oil, rust-proof black oil or hot galvanized.


36” x 26” STD SMLS/WLD BW ECCENTRIC REDUCER
ASTM A234 WP22 OR WP22W CL. 1

Buttweld Pipe Fitting Specification & Standards

Welded pipe fittings are made as per ASME spec B16.9. ASME B16.9 covers factory made wrought steel butwelding fittings in sizes 1/2" to 48". This standard however does not cover low pressure corrosion resistant buttwelding fittings. See MSS SP-43, Wrought Stainless Steel Butt-Welding Fittings.

A234 WPB is the most common material used for carbon steel butt welded fittings.

ASTM A234 WPB is the Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service.

Specifications  

  • ASTM:   A234 WPB
  • ASME:   B16.9, B.11
  • NACE:    MRO175
  • MSS:      SP-83, SP-95
Chemical Composition%
Grade C Mn P S Si Cr Mo Ni Cu Others
max max
WPB 0.3 0.29-1.06 0.05 0.058 0.1 0.4 0.15 0.4 0.4 V 0.08
(1,2,3,4,5) max min max max max max max
  1. Fittings made from bar or plate may have 0.35 max carbon.
  2. Fittings made from forgings may have 0.35 max Carbon and 0.35 max Silicon with no min.
  3. For each reduction of 0.01% below the specified Carbon maximum, an increase of 0.06% Manganese above the specified maximum will be permitted, up to a maximum of 1.35%.
  4. The sum of Copper, Nickel, Niobium, and Molybdenum shall not exceed 1.00%.
  5. The sum of Niobium and Molybdenum shall not exceed 0.32%.

Stainless Steel Butt Weld Fittings:

Stainless buttweld fittings are available in 316 and 304 grades.

304/304L (UNS S30400/S30403) 

Chemical Composition%
C Cr Mn Ni P S Si
MAX MAX MAX MAX MAX
0.035 18.0- 20.0 2.00 8.0-13.0 0.045 0.030 1.00

 Tensile Requirements

Tensile Strength:  (KSI) = 60                                      

Yield Strength:  (KSI) = 35                                          

(KSI converts to MPA {Megapascals} by multiplying by 6.895)         

316/316L (UNS S31600/S31603)  

Chemical Composition%
C Cr Mn Mo Ni P S Si
MAX MAX Max MAX MAX
0.035 16.0- 18.0 2.00 2.0-3.0 10.0-14.0 0.045 0.030 1.00

Tensile Requirements 

  • Tensile Strength:  (KSI) = 70                                      
  • Yield Strength:  (KSI) = 25                                          
  • (KSI converts to MPA {Megapascals} by multiplying by 6.895)   

DOWNLOAD STANDARD

Even welding and smooth weld line, can be substitute for seamless tube after drawing and cold rolling.

ASME B16.9

This Standard covers overall dimensions, tolerances, ratings, testing, and markings for wrought factory-made buttwelding fittings in sizes NPS 1 ⁄ 2 through 48 (DN 15 through 1200).

Fittings may be made to special dimensions, sizes, shapes, and tolerances by agreement between the manufacturer and the purchaser.

ASTM A234/ SA234M

ASTM A234/ SA234M Standard specification for pipe fittings of wrought carbon steel and alloy steel for moderate and high temperature service.

These fittings are for use in pressure piping and in pressure vessel fabrication for service at moderate and elevated temperatures.

Abrasion resistant reuducer pipe

Abrasion resistant material:Ceramic lined, Ceramic tile lined , Bi-metal clad pipe

Reducer, Pipe reducer size data

Reducers are usually concentric but eccentric reducers are used when required to maintain the same top-or bottom-of-pipe level.

A reducer can be used either as nozzle or as diffuser depending on the mach number of the flow.
A reducer allows for a change in pipe size to meet hydraulic flow requirements of the system, or to adapt to existing piping of a different size.

Special design available All the production process are made according to ISO9001:2000 strictly.

Keyword: Reducer, Seamless reducer, Steel reducer, Carbon Steel Seamless reducer, Concentric reducer

Materials

These fittings are manufactured in inch and metric size.
Nominal pipe
DN size
Outside Diameter at Bevel
Center to End
D1 D2
End to End
 L
Series A
Series B
Series A
Series B
20×15
26.9
25
21.3
18
38
25×20
25×15
33.7
33.7
32
32
26.9
21.3
25
18
51
51
32×25
32×20
32×15
42.4
42.4
42.4
38
38
38
33.7
26.9
21.3
32
25
18
51
51
51
40×32
40×25
40×20
40×15
48.3
48.3
48.3
48.3
45
45
45
45
42.4
33.7
26.7
21.3
38
32
25
18
64
64
64
64
50×40
50×32
50×25
50×20
60.3
60.3
60.3
60.3
57
57
57
57
48.3
42.4
33.7
26.9
45
38
32
25
76
76
76
76
65×50
65×40
65×32
65×25
76.1(73)
76.1(73)
76.1(73)
76.1(73)
76
76
76
76
60.3
48.3
42.4
33.7
57
45
38
32
89
89
89
89
80×65
80×50
80×40
80×32
88.9
88.9
88.9
88.9
89
89
89
89
76.1(73)
60.3
48.3
42.4
76
57
45
38
89
89
89
89
90×80
90×65
90×50
90×40
90×32
101.6
101.6
101.6
101.6
101.6
-
-
-
-
-
88.9
76.1(73)
60.3
48.3
42.4
-
-
-
-
-
102
102
102
102
102
100×90
100×80
100×65
100×50
100×40
114.3
114.3
114.3
114.3
114.3
108
108
108
108
108
101.6
88.9
76.1(73)
60.3
48.3
-
89
76
57
45
102
102
102
102
102
125×100
125×90
125×80
125×65
125×50
139.7
139.7
139.7
139.7
139.7
133
-
133
133
133
114.3
101.6
88.9
76.1(73)
60.3
108
-
89
76
57
127
127
127
127
127
150×125
150×100
150×90
150×80
150×65
168.3
168.3
168.3
168.3
168.3
159
159
-
159
159
139.7
114.3
101.6
88.9
76.1(73)
133
108
-
89
76
140
140
140
140
140
200×150
200×125
200×100
200×90
219.1
219.1
219.1
219.1
219
219
219
-
163.8
139.7
114.3
101.6
159
133
108
-
152
152
152
152
250×200
250×150
250×125
250×100
273.0
273.0
273.0
273.0
273
273
273
273
219.1
168.3
139.7
114.3
219
159
133
108
178
178
178
178
300×250
300×200
300×150
300×125
323.9
323.9
323.9
323.9
325
325
325
325
273.0
219.1
168.3
139.7
273
219
159
133
203
203
203
203
350×300
350×250
350×200
350×150
355.6
355.6
355.6
355.6
377
377
377
377
323.9
273.0
219.1
168.3
325
273
219
159
330
330
330
330
400×350
400×300
400×250
400×200
406.4
406.4
406.4
406.4
426
426
426
426
355.6
323.9
273.0
219.1
377
325
273
219
356
356
356
356
450×400
450×350
450×300
450×250
457.2
457.2
457.2
457.2
478
478
478
478
406.4
355.6
323.9
273.0
426
377
325
273
381
381
381
381
500×450
500×400
500×350
500×300
508.0
508.0
508.0
508.0
529
529
529
529
457.2
406.4
355.6
323.9
478
426
377
325
508
508
508
508
550×500
550×450
550×400
550×350
559
559
559
559
-
-
-
-
508
457
406
356
-
-
-
-
508
508
508
508
600×550
600×500
600×450
600×400
610
610
610
610
-
630
630
630
559
508
457
406
-
530
480
426
508
508
508
508
650×600
650×550
650×500
650×450
660
660
660
660
-
-
-
-
610
559
508
457
-
630
-
630
610
610
610
610
700×650
700×600
700×550
700×500
711
711
711
711
-
720
-
720
660
310
559
508
-
720
-
630
610
610
610
610
750×700
750×650
762
762
-
-
711
660
-
-
610
610
750×600
750×550
762
762
-
-
610
559
-
-
610
610
800×750
800×700
800×650
800×600
813
813
813
813
-
820
-
820
762
711
660
610
-
720
-
630
610
610
610
610
850×800
850×750
850×700
850×650
864
864
864
864
-
-
-
-
813
762
711
660
-
-
-
-
610
610
610
610
900×850
900×800
900×750
900×700
914
914
914
914
-
920
-
920
864
813
762
711
-
820
-
820
610
610
610
610
950×900
950×850
950×800
950×750
965
965
965
965
-
-
-
-
914
864
813
762
-
-
-
-
610
610
610
610
1000×950
1000×900
1000×850
1000×800
1016
1016
1016
1016
-
1020
-
1020
965
914
864
813
-
920
-
920
610
610
610
610
1050×1000
1050×950
1050×900
1050×850
1067
1067
1067
1067
-
-
-
-
1016
965
914
864
-
-
-
-
610
610
610
610
1100×1050
1100×1000
1100×950
1100×900
1118
1118
1118
1118
-
1120
-
1120
1067
1016
965
914
-
1020
-
1020
610
610
610
610
1150×1100
1150×1050
1150×1000
1150×950
1168
1168
1168
1168
-
-
-
-
1118
1067
1016
965
-
-
-
-
711
711
711
711
1200×1150
1200×1100
1200×1050
1200×1000
1220
1220
1220
1220
-
1220
-
1220
1168
1118
1067
1016
-
1120
-
1120
711
711
711
711
What is the difference between concentric and eccentric reducers ?

A reducer is the component in a pipeline that reduces the pipe size from a larger to a smaller bore (inner diameter).

Common type of Butt weld pipe fittings

A common example using welded pipe fitting is a pipe reduced by concentric reducer, welded to a weld neck flange and connected to an equipment. Figure below represent complete collection of butt welded pipe fitting



Fitting specification, Standard and identification

There are different varieties of pipe fittings made of various materials and available in various shapes and sizes.



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