ASME B16.9 - Butt-Weld Fitting Dimensions

Elbows & Reducers - Dimensions in mm

Column Legend

NPS = Nominal Pipe Size (inch) DN = Diameter Nominal (mm) OD = Outside Diameter A = Center to End (elbows) H = Overall Length (reducers)

All dimensions in mm per ASME B16.9 - Factory-made wrought butt-welding fittings

90° Long Radius Elbows (1.5D)

NPS	DN	OD	A (C-C)
1/2	15	21.3	38
3/4	20	26.7	38
1	25	33.4	38
1-1/4	32	42.2	48
1-1/2	40	48.3	57
2	50	60.3	76
2-1/2	65	73	95
3	80	88.9	114
3-1/2	90	101.6	133
4	100	114.3	152
5	125	141.3	190
6	150	168.3	229
8	200	219.1	305
10	250	273	381
12	300	323.8	457
14	350	355.6	533
16	400	406.4	610
18	450	457.2	686
20	500	508	762
24	600	609.6	914

NPS	DN	OD	A (C-C)
1/2	15	21.3	25
3/4	20	26.7	25
1	25	33.4	25
1-1/4	32	42.2	32
1-1/2	40	48.3	38
2	50	60.3	51
2-1/2	65	73	64
3	80	88.9	76
3-1/2	90	101.6	89
4	100	114.3	102
5	125	141.3	127
6	150	168.3	152
8	200	219.1	203
10	250	273	254
12	300	323.8	305
14	350	355.6	356
16	400	406.4	406
18	450	457.2	457
20	500	508	508
24	600	609.6	610

NPS	DN	OD	A (C-E)
1/2	15	21.3	16
3/4	20	26.7	19
1	25	33.4	22
1-1/4	32	42.2	25
1-1/2	40	48.3	29
2	50	60.3	38
2-1/2	65	73	48
3	80	88.9	57
3-1/2	90	101.6	67
4	100	114.3	76
5	125	141.3	95
6	150	168.3	114
8	200	219.1	152
10	250	273	190
12	300	323.8	229
14	350	355.6	267
16	400	406.4	305
18	450	457.2	343
20	500	508	381
24	600	609.6	457