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