Return – 180 Degree

Pipe Size (NPS)	J	K	Approx. Weight (lb)
Pipe Size (NPS)	J	K	STD	XS	XXS
1/2	3	1 15/16	0.4	–	–
3/4	2 1/4	1 11/16	0.4	0.7	–
1	3	2 3/16	0.8	1.0	1.5
1 1/4	3 3/4	2 3/4	1.3	1.8	2.7
1 1/2	4 1/2	3 1/4	1.9	2.4	4.0
2	6	4 3/16	3.2	4.4	7.5
2 1/2	7 1/2	5 3/16	6.5	8.0	14.0
3	9	6 1/4	10.3	13.0	22.0
3 1/2	10 1/2	7 1/4	13.0	16.8	32.0
4	12	8 1/4	18.5	25.0	40.0
5	15	10 5/16	30.0	44.0	72.0
6	18	12 5/16	50.0	70.0	130.0
8	24	16 5/16	95.0	142.0	236.0
10	30	20 3/8	117.0	215.0	–
12	36	24 3/8	230.0	320.0	–
14	42	28	325.0	400.0	–
16	48	32	412.0	550.0	–
18	54	36	510.0	690.0	–
20	60	40	640.0	830.0	–
22	66	44	787.0	1040.0	–
24	72	48	890.0	1200.0	–

Dimensions per ANSI/ASME B16.9.
A 180° return long radius (LR) has a centerline curvature equal to 1-1/2 times the nominal pipe size (NPS) for 3/4 inch and larger sizes.

Pipe Size (NPS)	G	H	Approx. Weight (lb)
Pipe Size (NPS)	G	H	STD	XS
1/2	–	–	–	–
3/4	–	–	–	–
1	2	1 5/8	0.5	–
1 1/4	2 1/2	2 1/16	0.8	–
1 1/2	3	2 7/16	1.2	1.5
2	4	3 3/16	2.0	3.0
2 1/2	5	3 15/16	4.3	5.6
3	6	4 3/4	6.0	8.5
3 1/2	7	5 1/2	9.0	12.0
4	8	6 1/4	12.5	17.0
5	10	7 3/4	19.0	28.0
6	12	9 5/16	35.0	46.0
8	16	12 5/16	68.0	100.0
10	20	15 3/8	115.0	140.0
12	24	18 3/8	155.0	218.0
14	28	21	210.0	275.0
16	32	24	260.0	340.0
18	36	27	330.0	430.0
20	40	30	410.0	550.0
22	–	–	–	–
24	48	36	590.0	780.0

Dimensions per ANSI/ASME B16.9.
A 180° return short radius (SR) has a centerline curvature equal to 1 times the nominal pipe size (NPS) for 1 inch and larger sizes.

180° LR – ANSI