Butt weld fittings

Concentric/Eccentric reducer

Dimensions of Butt Welded Reducer Concentric and Eccentric-ASME B16.9
NPS	O.D.	O.D.	Length
	D	D1	H
3/4 x 1/2	26.7	21.3	38
1 x 1/2	33.4	21.3	51
1 x 3/4	33.4	26.7	51
1 ¼ x 1/2	42.2	21.3	51
1 ¼ x 3/4	42.2	26.7	51
1 ¼ x 1	42.2	33.4	51
1 ½ x 1/2	48.3	21.3	64
1 ½ x 3/4	48.3	26.7	64
1 ½ x 1	48.3	33.4	64
1 ½ x 1 ¼	48.3	42.2	64
2 x 3/4	60.3	26.7	76
2 x 1	60.3	33.4	76
2 x 1 ¼	60.3	42.2	76
2 x 1 ½	60.3	48.3	76
2 ½ x 1	73	33.4	89
2 ½ x 1 ¼	73	42.2	89
2 ½ x 1 ½	73	48.3	89
2 ½ x 2	73	60.3	89
3 x 1 ¼	88.9	42.2	89
3 x 1 ½	88.9	48.3	89
3 x 2	88.9	60.3	89
3 x 2 ½	88.9	73	89
3 ½ x 1 ¼	101.6	42.2	102
3 ½ x 1 ½	101.6	48.3	102
3 ½ x 2	101.6	60.3	102
3 ½ x 2 ½	101.6	73	102
3 ½ x 3	101.6	88.9	102
4 x 1 ½	114.3	48.3	102
4 x 2	114.3	60.3	102
4 x 2 ½	114.3	73	102
4 x 3	114.3	88.9	102
4 x 3 ½	114.3	101.6	102
5 x 2	141.3	60.3	127
5 x 2 ½	141.3	73	127
5 x 3	141.3	88.9	127
5 x 3 ½	141.3	101.6	127
5 x 4	141.3	114.3	127
6 x 2 ½	168.3	73	140
6 x 3	168.3	88.9	140
6 x 3 ½	168.3	101.6	140
6 x 4	168.3	114.3	140
6 x 5	168.3	141.3	140
8 x 3 ½	219.1	101.6	152
8 x 4	219.1	114.3	152
8 x 5	219.1	141.3	152
8 x 6	219.1	168.3	152
10 x 4	273	114.3	178
10 x 5	273	141.3	178
10 x 6	273	168.3	178
10 x 8	273	219.1	178
12 x 5	323.9	141.3	203
12 x 6	323.9	168.3	203
12 x 8	323.9	219.1	203
12 x 10	323.9	273	203
14 x 6	355.6	168.3	330
14 x 8	355.6	219.1	330
14 x 10	355.6	273	330
14 x 12	355.6	323.9	330
16 x 8	406.4	219	356
16 x 10	406.4	273	356
16 x 12	406.4	323.9	356
16 x 14	406.4	355.6	356
18 x 10	457	273	381
18 x 12	457	323.9	381
18 x 14	457	355.6	381
18 x 16	457	406.4	381
20 x 12	508	323.9	508
20 x 14	508	355.6	508
20 x 16	508	406.4	508
20 x 18	508	457	508
22 x 14	559	355.6	508
22 x 16	559	406.4	508
22 x 18	559	457	508
22 x 20	559	508	508
24 x 16	610	406.4	508
24 x 18	610	457	508
24 x 20	610	508	508
24 x 22	610	559	508
26 x 18	660	457	610
26 x 20	660	508	610
26 x 22	660	559	610
26 x 24	660	610	610
28 x 18	711	457	610
28 x 20	711	508	610
28 x 24	711	610	610
28 x 26	711	660	610
30 x 20	762	508	610
30 x 24	762	610	610
30 x 26	762	660	610
30 x 28	762	711	610
32 x 24	813	610	610
32 x 26	813	660	610
32 x 28	813	711	610
32 x 30	813	762	610
34 x 24	864	610	610
34 x 26	864	660	610
34 x 30	864	762	610
34 x 32	864	813	610
36 x 24	914	610	610
36 x 26	914	660	610
36 x 30	914	762	610
36 x 32	914	813	610
36 x 34	914	864	610
38 x 26	965	660	610
38 x 28	965	711	610
38 x 30	965	762	610
38 x 32	965	813	610
38 x 34	965	864	610
38 x 36	965	914	610
40 x 30	1016	762	610
40 x 32	1016	813	610
40 x 34	1016	864	610
40 x 36<, /P>	1016	914	610
40 x 38	1016	965	610
42 x 30	1067	762	610
42 x 32	1067	813	610
42 x 34	1067	864	610
42 x 36	1067	914	610
42 x 38	1067	965	610
42 x 40	1067	1016	610
44 x 36	1118	914	610
44 x 38	1118	965	610
44 x 40	1118	1016	610
44 x 42	1118	1067	610
46 x 38	1168	965	711
46 x 40	1168	1016	711
46 x 42	1168	1067	711
46 x 44	1168	1118	711
48 x 40	1219	1016	711
48 x 42	1219	1067	711
48 x 44	1219	1118	711
48 x 46	1219	1168	711

Dimensions are in millimeters unless otherwise indicated. Wall thickness (t) must be specified by customer

Dimensional tolerance of Concentric and Eccentric Reducer-ASME B16.9
Nominal Pipe Size	1/2 to 2½	3 to 3½	4	5 to 8	10 to 18	20 to 24	26 to 30	32 to 48
Outside Diameter at bevel (D)	+1.6 -0.8	1.6	1.6	+2.4 -1.6	+4 -3.2	+6.4 -4.8	+6.4 -4.8	+6.4 -4.8
Inside Diameter at End	0.8	1.6	1.6	1.6	3.2	4.8	+6.4 -4.8	+6.4 -4.8
Overall Length (H)	2	2	2	2	2	2	5	5
Wall Thickness (t)	Not less than 87.5% of Nominal Wall Thickness

Dimensional tolerances are in millimeters unless otherwise indicated and are equal ± except as noted.

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Butt weld fittings

Concentric/Eccentric reducer