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
|
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
|
Related Tags: ASME B16.5 (7) flange (46) Intergal Flange (2) Long Weld Neck Flange (2) ASME B16.5 Long Weld Neck Flange/Intergal Flange Dimensions Related Posts : ASME B16.47 Series A Weld Neck Flange/WN Flange Dimensions DIN 2566 PN10/PN16 Threaded Flange Dimensions DIN 2655 PN25 Loose (Lapped Joint) Flange Plain Collar Dimensions ASME B16.5 Threaded Flange Dimensions DIN 2503 PN25 Plate Flange Dimensions DIN 2642 PN10 Loose (Lapped Joint) Flange Plain Collar Dimensions DIN 2637 PN100 Welding Neck Flange Dimensions DIN 2630 PN2.5 Welding Neck/WN Flange Dimensions DIN 2627 PN400 Welding Neck Flange Dimensions API 605/ASME B16.47 Series B Steel Flanges NPS 26 Through NPS 60
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