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ASME B16.5 Long Weld Neck Flange/Intergal Flange Dimensions


Long Neck Welding (abbreviated LWN) flanges are similar to a standard Welding Neck flange, but the “Neck” is considerably longer. This type is often used as a nozzle for a barrel or column. In addition, there are the type LWN Heavy Barrel (HB) and the Equal LWN Barrel (E); they have a different shape and a thicker “Wall”.

ASME B16.5 Long Weld Neck Flange Class 150 LBS Dimensions
NPS
O
Tf
X
B
Y
W
BH
Holes
1/2″
88.9
9.7
30.2
12.7
228.6
60.5
15.9
4
3/4″
98.6
11.2
38.1
19.1
228.6
69.9
15.9
4
1″
108.0
12.7
49.3
25.4
228.6
79.2
15.9
4
1-1/4″
117.5
14.2
58.7
31.8
228.6
88.9
15.9
4
1-1/2″
127.0
15.7
65.0
38.1
228.6
98.6
15.9
4
2″
152.4
17.5
77.7
50.8
228.6
120.7
19.1
4
2-1/2″
177.8
20.6
90.4
63.5
228.6
139.7
19.1
4
3″
190.5
22.4
108.0
76.2
228.6
152.4
19.1
4
3-1/2″
215.9
22.4
122.2
88.9
228.6
177.8
19.1
8
4″
228.6
22.4
134.9
101.6
228.6
190.5
19.1
8
5″
254.0
22.4
163.6
127.0
304.8
215.9
22.2
8
6″
279.4
23.9
192.0
152.4
304.8
241.3
22.2
8
8″
342.9
26.9
246.1
203.2
304.8
298.5
22.2
8
10″
406.4
28.4
304.8
254.0
304.8
362.0
25.4
12
12″
482.6
30.2
365.3
304.8
304.8
431.8
25.4
12
14″
533.4
33.3
400.1
355.6
304.8
476.3
28.6
12
16″
596.9
35.1
457.2
406.4
304.8
539.8
28.6
16
18″
635.0
38.1
505.0
457.2
304.8
577.9
31.8
16
20″
698.5
41.1
558.8
508.0
304.8
635.0
31.8
20
24″
812.8
46.0
663.4
609.6
304.8
749.3
34.9
20

 

ASME B16.5 Long Weld Neck Flange Class 300 LBS Dimensions
NPS
O
Tf
X
B
Y
W
BH
Holes
1/2″
95.3
12.7
38.1
12.7
228.6
66.5
15.9
4
3/4″
117.3
14.2
47.8
19.1
228.6
82.6
19.1
4
1″
124.0
15.7
53.8
25.4
228.6
88.9
19.1
4
1-1/4″
133.4
17.5
63.5
31.8
228.6
98.6
19.1
4
1-1/2″
155.4
19.1
69.9
38.1
228.6
114.3
22.2
4
2″
165.1
20.6
84.1
50.8
228.6
127.0
19.1
8
2-1/2″
190.5
23.9
100.1
63.5
228.6
149.4
22.2
8
3″
209.6
26.9
117.3
76.2
228.6
168.1
22.2
8
3-1/2″
228.6
28.4
133.4
88.9
228.6
184.2
22.2
8
4″
254.0
30.2
146.1
101.6
228.6
200.2
22.2
8
5″
279.4
33.3
177.8
127.0
304.8
235.0
22.2
8
6″
317.5
35.1
206.2
152.4
304.8
269.7
22.2
12
8″
381.0
39.6
260.4
203.2
304.8
330.2
25.4
12
10″
444.5
46.0
320.5
254.0
304.8
387.4
28.6
16
12″
520.7
49.3
374.7
304.8
304.8
450.9
31.8
16
14″
584.2
52.3
425.5
355.6
304.8
514.4
31.8
20
16″
647.7
55.6
482.6
406.4
304.8
571.5
34.9
20
18″
711.2
58.7
533.4
457.2
304.8
628.7
34.9
24
20″
774.7
62.0
587.2
508.0
304.8
685.8
34.9
24
24″
914.4
68.3
701.5
609.6
304.8
812.8
41.3
24

 

ASME B16.5 Long Weld Neck Flange Class 400 LBS Dimensions
NPS
O
Tf
X
B
Y
W
BH
Holes
1/2″
95.3
14.2
38.1
12.7
228.6
66.5
15.9
4
3/4″
117.3
15.7
47.8
19.1
228.6
82.6
19.1
4
1″
124
17.5
53.8
25.4
228.6
88.9
19.1
4
1-1/4″
133.4
20.6
63.5
31.8
228.6
98.6
19.1
4
1-1/2″
155.4
22.4
69.9
38.1
228.6
114.3
22.2
4
2″
165.1
25.4
84.1
50.8
228.6
127
19.1
8
2-1/2″
190.5
28.4
100.1
63.5
228.6
149.4
22.2
8
3″
209.6
31.8
117.3
76.2
228.6
168.1
22.2
8
3-1/2″
228.6
35.1
133.4
88.9
228.6
184.2
25.4
8
4″
254
35.1
146.1
101.6
228.6
200.2
25.4
8
5″
279.4
38.1
177.8
127
304.8
235
25.4
8
6″
317.5
41.1
206.2
152.4
304.8
269.7
25.4
12
8″
381
47.8
260.4
203.2
304.8
330.2
28.6
12
10″
444.5
53.8
320.5
254
304.8
387.4
31.8
16
12″
520.7
57.2
374.7
304.8
304.8
450.9
34.9
16
14″
584.2
60.5
425.5
355.6
304.8
514.4
34.9
20
16″
647.7
63.5
482.6
406.4
304.8
571.5
38.1
20
18″
711.2
66.5
533.4
457.2
304.8
628.7
38.1
24
20″
774.7
69.9
587.2
508
304.8
685.8
41.3
24
24″
914.4
76.2
701.5
609.6
304.8
812.8
47.6
24

 

ASME B16.5 Long Weld Neck Flange Class 600 LBS Dimensions

NPS
O
Tf
X
B
Y
W
BH
Holes
1/2″
95.3
14.2
38.1
12.7
228.6
66.5
15.9
4
3/4″
117.3
15.7
47.8
19.1
228.6
82.6
19.1
4
1″
124
17.5
53.8
25.4
228.6
88.9
19.1
4
1-1/4″
133.4
20.6
63.5
31.8
228.6
98.6
19.1
4
1-1/2″
155.4
22.4
69.9
38.1
228.6
114.3
22.2
4
2″
165.1
25.4
84.1
50.8
228.6
127
19.1
8
2-1/2″
190.5
28.4
100.1
63.5
228.6
149.4
22.2
8
3″
209.6
31.8
117.3
76.2
228.6
168.1
22.2
8
3-1/2″
228.6
35.1
133.4
88.9
228.6
184.2
25.4
8
4″
273.1
38.1
152.4
101.6
228.6
215.9
25.4
8
5″
330.2
44.5
189
127
304.8
266.7
28.6
8
6″
355.6
47.8
222.3
152.4
304.8
292.1
28.6
12
8″
419.1
55.6
273.1
203.2
304.8
349.3
31.8
12
10″
508
63.5
342.9
254
304.8
431.8
34.9
16
12″
558.8
66.5
400.1
304.8
304.8
489
34.9
20
14″
603.3
69.9


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Related Tags: ASME B16.5 (8)  flange (50)  Intergal Flange (2)  Long Weld Neck Flange (2)  

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