Concentric Reducer Dimensions (ASME B16.9)

DN (D1×D2)	NPS (Inches)	Outside Diameter Series A (mm)	End to End H (mm)
20×15	3/4×1/2	26.9×21.3	38
20×10	3/4×3/8	26.9×17.3	38
25×20	1×3/4	33.7×26.9	51
25×15	1×1/2	33.7×21.3	51
32×25	1¼×1	42.4×33.7	51
32×20	1¼×3/4	42.4×26.9	51
32×15	1¼×1/2	42.4×21.3	51
40×32	1½×1¼	48.3×42.4	64
40×25	1½×1	48.3×33.7	64
40×20	1½×3/4	48.3×26.9	64
40×15	1½×1/2	48.3×21.3	64
50×40	2×1½	60.3×48.3	76
50×32	2×1¼	60.3×42.4	76
50×25	2×1	60.3×33.7	76
50×20	2×3/4	60.3×26.9	76
65×50	2½×2	73.0×60.3	89
80×65	3×2½	88.9×73.0	89
100×90	4×3½	114.3×101.6	102
125×100	5×4	141.3×114.3	127
150×125	6×5	168.3×141.3	140
200×150	8×6	219.1×168.3	152
250×200	10×8	273.0×219.1	178
300×250	12×10	323.9×273.1	203
350×300	14×12	355.6×323.9	330
400×350	16×14	406.4×355.6	356
450×400	18×16	457×406.4	381
500×450	20×18	508×457	508
600×550	24×22	610×559	508
700×650	28×26	711×660	610
800×750	32×30	813×762	610