Pipe reducers

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

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

Concentric reducer

Eccentric reducer

Stainless reducer

ASTM A234 WPB Reducer

ANSI B16.9 Reducer

Large size eccentric reducer

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.

• Based on different materials, pipe reducers include carbon steel reducer, stainless steel reducer, and alloy steel reducer etc.
  
• Depending on their construction, pipe reducers contain threaded reducer, tapered reducer and anti-roll reducer etc.

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).

• Concentric reducer is symmetrical both ends are aligned along the center.
• Eccentric reducer is not symmetrical ends are off center of one another.

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.

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

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)   

Abrasion resistant Pipe reducer

Alumina ceramics have been developed and optimized for maximum wear resistance and corrosion resistance.

Ceramic lined reducer pipe

Ceramic Tile lined pipe reducer

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.

• Standard: ANSI B16.9 / 16.28, ASTM A53/A106, API 5L, ASTM/ASME SA234 WP11, WP12, WP22, WP9
• Size range: 1/2 to 56 inches (DN15 to DN1400)
• Pressure: SCH5 to SCH160

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

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