ANSI B16.9 Long Radius 90 Degree Butt Welding Elbow
Product Description
Welding elbow pipe technical requirements are the following: geometric dimensions, including diameter, diameter, wall thickness. It is also required to control the radius of curvature. Such as a radius of 1.5D, then the radius of curvature must be within the required tolerance. As most of these pipes for welding, in order to improve the quality of welding, the end of the car into a groove, leaving a certain angle, with a certain side, this requirement is also more stringent, more thick side, the angle of the number and deviation range Have provisions, geometric size than the tube more than a lot of items. Surface quality and mechanical properties of the basic and the tube is the same. In order to facilitate the welding, and connected to the steel pipe is the same.
Elbow Specifications
Nominal Diameter
Outside Diameter
at Bevel
Center to End
Center to Center
Back to Face
45Elbow
90Elbow
180Elbow
B
A
O
K
DN
NPS
Series A
Series B
Long
Radius
Long
Radius
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
-
-
High-quality products
Seamless Carbon Steel Elbow is to change the direction of the pipe in the piping system. 45 elbow and 90 elbow 180 elbow three kind most commonly used, according to project needs, also include 60 bend and other non-normal angles.Two 45-degree elbows can not be welded into a 90-degree bend to use, because the stress concentration area is the elbow pipe, expansion and most of the stress deformation during cooling are released at the elbow. Also weld itself to be the weak link, fatigue deformation will soon cause cracking damage, which planted a lot of hidden dangers, so do not at immediate convenience, eventually leading to huge losses.
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