Butt-welded Pipe Fitting Elbow

A butt weld pipe fitting is designed to be welded on site at its end(s) to connect pipe(s) together and allow change in direction or pipe diameter, or branching or ending. This fitting then becomes part of a system for transporting fluids (oil, gas, steam, chemicals, …) in a safe and efficient manner, over short or long distances. Other types of fittings can be threaded or socket welded.

Long and Short Radius

Elbows are split into two groups which define the distance over which they change direction; the center line of one end to the opposite face. This is known as the "center to face" distance and is equivalent to the radius through which the elbow is bent.
The center to face distance for a "long" radius elbow, abbreviated LR always is "1½ x Nominal Pipe Size (NPS) (1½D)", while the center to face distance for a "short" radius elbow, abbreviated SR even is to nominal pipe size.

Butt Weld 90 Deg Long Radius Elbow Dimensions

Butt-welded Fitting Steel Elbow Specifications

Butwelded Type	Butt-welded Fitting Elbow Standard
Type Of Elbow	45 Deg, 90 Deg , 180 Deg.
Size	1/2"NB TO 48"NB IN
Schedule	SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Type	Seamless / ERW / Welded / Fabricated
Grades
Nickel Alloy	ASTM / ASME SB 336 UNS 2200 ( NICKEL 200 ), UNS 2201 (NICKEL 201 ), UNS 4400 (MONEL 400 ), UNS 8020 ( ALLOY 20 / 20 CB 3, UNS 8825 INCONEL (825), UNS 6600 (INCONEL 600 ), UNS 6601 ( INCONEL 601 ), UNS 6625 (INCONEL 625), UNS 10276 ( HASTELLOY C 276 )
Stainless Steel	ASTM / ASME SA 403 GR WP "S" / "W" / " WX" 304 , 304L, 304H, 304N, 304LN, 309, 310H, 316, 316H, 317, 317L, 321, 321H, 347, 347 H.
Carbon Steel	ASTM / ASME A 234 WPB, WPC ASTM / ASME A 860 WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65 & WPHY 70.
Alloy Steel	ASTM / ASME A 234 WP 1, WP 5, WP 9, WP 11, WP 12, WP 22, WP 23, WP 91.
Duplex Steel	ASTM / ASME SA 815 UNS NO.S 31803, S 32205, S 32550, S 32750, S 32760.

SIZE CHART

Nominal Diameter		Outside Diameter at Bevel		Center to End			Center to Center		Back to Face
				45°Elbow	90°Elbow		180°Elbow
				B	A		O		K
DN	NPS	Series A	Series B	LongRadius	LongRadius	Short Radius	Long Radius	Short Radius	Long Radius	Short Radius
15	1/2	21.3	18	16	38	–	76	–	48	–
20	3/4	26.9	25	19	38	–	76	–	51	–
25	1	33.7	32	22	38	25	76	51	56	41
32	1.1/4	42.4	38	25	48	32	95	64	70	52
40	1.1/2	48.3	45	29	57	38	114	76	83	62
50	2	60.3	57	35	76	51	152	102	106	81
65	2.1/2	76.1(73)	76	44	95	64	190	127	132	100
80	3	88.9	89	51	114	76	229	152	159	121
90	3.1/2	101.6	–	57	133	89	267	178	184	140
100	4	114.3	108	64	152	102	305	203	210	159
125	5	139.7	133	79	190	127	381	254	262	197
150	6	168.3	159	95	229	152	457	305	313	237
200	8	219.1	219	127	305	203	610	406	414	313
250	10	273.0	273	159	381	254	762	508	518	391
300	12	323.9	325	190	457	305	914	610	619	467
350	14	355.6	377	222	533	356	1067	711	711	533
400	16	406.4	426	254	610	406	1219	813	813	610
450	18	457.2	478	286	686	457	1372	914	914	686
500	20	508.0	529	318	762	508	1524	1016	1016	762
550	22	559	–	343	838	559	1676	1118	1118	838
600	24	610	630	381	914	610	1829	1219	1219	914
650	26	660	–	406	991	660	1982	1320	–	–
700	28	711	720	438	1067	711	2134	1422	–	–
750	30	762	–	470	1143	762	2286	1524	–	–
800	32	813	820	502	1219	813	2438	1626	–	–
850	34	864	–	533	1295	864	2590	1728	–	–
900	36	914	920	565	1372	914	2744	1828	–	–
950	38	965	–	600	1448	965	2896	1930	–	–
1000	40	1016	1020	632	1524	1016	3048	2032	–	–
1050	42	1067	–	660	1600	1067	3200	2134	–	–
1100	44	1118	1120	695	1676	1118	3352	2236	–	–
1150	46	1168	–	727	1753	1168	3506	2336	–	–
1200	48	1220	1220	759	1829	1219	3658	2440	–	–