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Welding Neck Flanges
Fabricated with finest quality of carbon steel, stainless
steel, etc., our range of welding neck flanges is high in demand across the
globe. These welding neck steel flanges features high performance,
durability, reliability and corrosion resistance. The steel welding neck
flanges are available in standard as well as customized dimensions as per
the demands of our clients. We ensure reasonable pricing of the products and
timely delivery of the consignment.
Stainless Steel : ASTM A 182, A 240
Grade : F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H,
317, 347, 347H,904L, Duplex stainless steel UNS S31803, 2205, Super Duplex
stainless steel UNS S32750
Carbon Steel : ASTM A 105, ASTM A 181
Alloy Steel : ASTM A 182, GR F1, F11, F22, F5, F9, F91
Nickel Alloys : Monel 400 & 500, Inconel 600 & 625, Incolloy
800, 825, Hastelloy C22,C276
ANSI B 600 Class
| Pipe |
Flange
Dimension |
Neck
Dimension |
RF |
Drilling
Dimension |
| Size |
|
A |
B |
C |
D |
E |
F |
G |
H |
I |
J |
| Outer Diametermeter mm |
Overall Diameter mm |
Inner Diameter mm |
Plate Thickness min mm |
Total Height mm |
Neck Dia mm |
Hub Diameter mm |
Face Diameter mm |
Number of Holes |
Bolt Hole Diameter mm |
PCD mm |
| ½ |
21.30 |
95.30 |
 |
14.20 |
52.30 |
21.30 |
38.10 |
35.00 |
4 |
15.70 |
66.55 |
| ¾ |
26.70 |
117.3 |
15.70 |
57.15 |
26.70 |
47.80 |
42.90 |
4 |
19.10 |
82.60 |
| 1 |
33.40 |
124.0 |
17.50 |
62.00 |
33.50 |
53.80 |
50.80 |
4 |
19.10 |
88.90 |
| 1 ¼ |
42.20 |
133.4 |
20.60 |
66.55 |
42.20 |
63.50 |
63.50 |
4 |
19.10 |
98.60 |
| 1 ½ |
48.30 |
155.4 |
22.40 |
69.85 |
48.30 |
69.85 |
73.15 |
4 |
22.40 |
114.3 |
| 2 |
60.30 |
165.1 |
25.40 |
73.15 |
60.45 |
84.10 |
91.90 |
8 |
19.10 |
127.0 |
| 2 ½ |
73.00 |
190.5 |
28.40 |
79.25 |
73.15 |
100.1 |
104.6 |
8 |
22.40 |
149.4 |
| 3 |
88.90 |
209.6 |
31.75 |
82.60 |
88.90 |
117.3 |
127.0 |
8 |
22.40 |
168.1 |
| 3 ½ |
101.6 |
228.6 |
35.10 |
85.90 |
101.6 |
133.4 |
139.7 |
8 |
25.40 |
184.2 |
| 4 |
114.3 |
273.1 |
38.10 |
101.6 |
114.3 |
152.4 |
157.2 |
8 |
25.40 |
215.9 |
| 5 |
141.3 |
330.2 |
44.50 |
114.3 |
141.2 |
189.0 |
185.7 |
8 |
28.40 |
266.7 |
| 6 |
168.3 |
355.6 |
47.80 |
117.3 |
168.4 |
222.3 |
215.9 |
12 |
28.40 |
292.1 |
| 8 |
219.1 |
419.1 |
55.60 |
133.4 |
219.2 |
273.1 |
269.7 |
12 |
31.75 |
349.3 |
| 10 |
273.0 |
508.0 |
63.50 |
152.4 |
273.0 |
342.9 |
323.8 |
16 |
35.10 |
431.8 |
| 12 |
323.8 |
558.8 |
66.55 |
155.4 |
323.8 |
400.1 |
381.0 |
20 |
35.10 |
489.0 |
| 14 |
355.6 |
603.3 |
69.85 |
165.1 |
355.6 |
431.8 |
412.7 |
20 |
38.10 |
527.1 |
| 16 |
406.4 |
685.8 |
76.20 |
177.8 |
406.4 |
495.3 |
469.9 |
20 |
41.10 |
603.3 |
| 18 |
457.2 |
743.0 |
82.60 |
184.2 |
457.2 |
546.1 |
533.4 |
20 |
44.50 |
654.1 |
| 20 |
508.0 |
812.8 |
88.90 |
190.5 |
508.0 |
609.6 |
584.2 |
24 |
44.50 |
723.9 |
| 24 |
609.6 |
939.8 |
101.6 |
203.2 |
609.6 |
717.6 |
692.1 |
24 |
50.80 |
838.2 |
|
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Notes
- Welding neck flanges dimensions B corresponds to the pipe inside
diameter. Values quoted assume 40S/Standard wall thickness
- Weights of welding neck flanges are based on manufacturer's data
and are approximate.
|
ANSI B 900 Class
| Pipe |
Flange Dimension |
Neck Dimension
|
RF |
Drilling
Dimension |
| Size |
|
A |
B |
C |
D |
E |
F |
G |
H |
I |
J |
| Outer Diameter mm |
Overall Dia mm |
Inside Dia mm |
Plate Thickness min mm |
Total Height mm |
Dia at Weld Bevel mm |
Hub Dia mm |
Face Dia mm |
Number of Holes |
Bolt Hole Dia mm |
Dia of Circle of Holes mm |
| ½ |
21.30 |
120.6 |
|
22.30 |
60.45 |
21.30 |
38.10 |
35.00 |
4 |
22.30 |
82.50 |
| ¾ |
26.70 |
130.0 |
25.40 |
69.85 |
26.70 |
44.00 |
42.90 |
4 |
22.30 |
88.90 |
| 1 |
33.40 |
149.3 |
28.40 |
73.15 |
33.50 |
52.30 |
50.80 |
4 |
25.40 |
101.6 |
| 1 ¼ |
42.20 |
158.7 |
28.40 |
73.15 |
42.20 |
63.50 |
63.50 |
4 |
25.40 |
111.2 |
| 1 ½ |
48.30 |
177.8 |
31.70 |
82.50 |
48.30 |
69.85 |
73.15 |
4 |
28.40 |
123.9 |
| 2 |
60.30 |
215.9 |
38.10 |
101.6 |
60.45 |
104.6 |
91.90 |
8 |
25.40 |
165.1 |
| 2 ½ |
73.00 |
244.3 |
41.10 |
104.6 |
73.15 |
123.9 |
104.6 |
8 |
28.40 |
190.5 |
| 3 |
88.90 |
241.3 |
38.10 |
101.6 |
88.90 |
127.0 |
127.0 |
8 |
25.40 |
190.5 |
| 4 |
114.3 |
292.1 |
44.40 |
114.3 |
114.3 |
158.7 |
157.2 |
8 |
31.70 |
234.9 |
| 5 |
141.3 |
349.2 |
50.80 |
127.0 |
141.2 |
190.5 |
185.7 |
8 |
35.00 |
279.4 |
| 6 |
168.3 |
381.0 |
55.60 |
139.7 |
168.4 |
234.9 |
215.9 |
12 |
31.70 |
317.5 |
| 8 |
219.1 |
469.9 |
63.50 |
162.0 |
219.2 |
298.4 |
269.7 |
12 |
38.10 |
393.7 |
| 10 |
273.0 |
546.1 |
69.85 |
184.1 |
273.0 |
368.3 |
323.8 |
16 |
38.10 |
469.9 |
| 12 |
323.8 |
609.6 |
79.25 |
200.1 |
323.8 |
419.1 |
381.0 |
20 |
38.10 |
533.4 |
| 14 |
355.6 |
641.3 |
85.80 |
212.8 |
355.6 |
450.8 |
412.7 |
20 |
41.10 |
558.8 |
| 16 |
406.4 |
704.8 |
88.90 |
215.9 |
406.4 |
508.0 |
469.9 |
20 |
44.40 |
615.9 |
| 18 |
457.2 |
787.4 |
101.6 |
228.6 |
457.2 |
565.1 |
533.4 |
20 |
50.80 |
685.8 |
| 20 |
508.0 |
857.2 |
107.9 |
247.6 |
508.0 |
622.3 |
584.2 |
20 |
53.80 |
749.3 |
| 24 |
609.6 |
1041.4 |
139.7 |
292.1 |
609.6 |
749.3 |
692.1 |
20 |
66.55 |
901.7 |
Notes
- Dimensions B corresponds to the pipe inside diameter. Values of
ANSI B 900 Class quoted assume 40S/Standard wall thickness
- ANSI B 900 Class weights are based on manufacturer's data and are
approximate.
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