Dimensions of ASME B16.9 Short Radius 180-deg Returns

Nominal Size	Outside Diameter at Bevel	Center to Center	Back to Back
NPS	mm. in.	O mm. in.	K mm. in.
1	33.4 1.32	51 2.00	41 1.62
1 1/4	42.2 1.66	64 2.50	52 2.06
1 1/2	48.3 1.90	76 3.00	62 2.44
2	60.3 2.38	102 4.00	81 3.19
2 1/2	73.0 2.88	127 5.00	100 3.94
3	88.9 3.50	152 6.00	121 4.75
3 1/2	101.6 4.00	178 7.00	140 5.50
4	114.3 4.50	203 8.00	159 6.25
5	141.3 5.56	254 10.00	197 7.75
6	168.3 6.62	305 12.00	237 9.31
8	219.1 8.62	406 16.00	313 12.31
10	273.0 10.75	508 20.00	391 15.38
12	323.8 12.75	610 24.00	467 18.38
14	355.6 14.00	711 28.00	533 21.00
16	406.4 16.00	813 32.00	610 24.00
18	457.0 18.00	914 36.00	686 27.00
20	508.0 20.00	1016 40.00	762 30.00
22	559.0 22.00	1118 44.00	838 33.00
24	610.0 24.00	1219 48.00	914 36.00

*All dimensions are furnished in both SI(metric) units and US Customary units.

View more specification of ASME B16.9.