Butt weld fittings

180°LR/SR Elbow

Dimension of Butt Welded Elbow 180°Elbow-Long and Short Radius-ASME B16.9
NPS	O.D. D	180°Long Radius			180°Short Radius
		Center-to-Center O	Back-to-Face K	Center-to-Center O		Back-to-Face K
1/2	21.3	76	48	-		-
3/4	26.7	76	51	-		-
1	33.4	76	56	51		41
1.1/4	42.2	95	70	64		52
1.1/2	48.3	114	83	76		62
2	60.3	152	106	102		81
2.1/2	73	190	132	127		100
3	88.9	229	159	152		121
3.1/2	101.6	267	184	178		140
4	114.3	305	210	203		159
5	141.3	381	262	254		197
6	168.3	457	313	305		237
8	219.1	610	414	406		313
10	273	762	518	508		391
12	323.8	914	619	610		467
14	355.6	1067	711	711		533
16	406.4	1219	813	813		610
18	457	1372	914	914		686
20	508	1524	1016	1016		762
22	559	1676	1118	1118		838
24	610	1829	1219	1219		914

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

Nominal Pipe Size	1/2 to 2½	3 to 3½	4	5 to 8	10 to 18	20 to 24
Outside Diameter at Bevel (D)	+1.6 -0.8	1.6	1.6	+2.4 -1.6	+4 -3.2	+6.4 -4.8
Inside Diameter at End	0.8	1.6	1.6	1.6	3.2	4.8
Center to Center (O)	6	6	6	6	10	10
Back to Face (K)	6	6	6	6	6	6
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.