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″.
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.
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 |
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)