SWRF Flange
It is Socket Weld Raised Face (SWRF) Flange.
Socket Weld Flanges are similar to slip-on flanges, however, socket welds have an internal recess on the inside diameter to allow for a smoother flow of the process fluid. The positive of this is that is creates a smooth bore with the proper welding and grinding. The negative of this type of flange is that it can be more expensive than a slip-on due to more intricate machining, and they can be less readily available than slip-ons due to the fact that the bottom half of the inside diameter must be made to the same schedule as the pipe that is being used. (Customer must specify the schedule needed) These socket weld flanges were initially developed for use on smaller sizes of pipe at higher pressure ratings. They are more used on lower pressure temperature as well today.
These Flanges are available in the following range.
Stainless Steel: ASTM a182 F304, F304L, F304H, F316, F316L, F316Ti, F310, F310S, F321, F321H, F317, F347, F347H, F904L.
Duplex Stainless Steel: UNS S31803, UNS S32750
Carbon Steel: ASTM a105,
Alloy Steel: ASTM a182 F1, F11, F22, F5, F9, F91
Nickel Alloys: Monel 400 & 500, Inconel 600 & 625, Incoloy 800, 825, Hastelloy C22, C276
Copper Alloys: Copper, Brass & Gunmetal
Size: 1/8" NB TO 48"NB.
Class: 150#, 300#, 400#, 600#, 900#, 1500#, 2500#
Dimensional Standard
ANSI: ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48
DIN: DIN 2527, DIN 2566, DIN 2573, DIN 2576, DIN 2641, DIN 2642, DIN 2655, DIN 2656, DIN 2627, DIN 2628, DIN 2629, DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2636, DIN 2637, DIN 2638, DIN 2673
B.S: BS 4504, BS4504, BS1560, BS10
| DIMENSIONS OF CLASS 150 FLANGES AS PER ANSI B 16.5 |
| NB |
a |
D |
B |
G |
K |
E |
F |
H |
L |
No. of Holes |
| ½” |
15 |
30.2 |
88.9 |
11.1 |
34.9 |
60.3 |
22.3 |
9.5 |
15.9 |
15.9 |
4 |
| ¾” |
20 |
38.1 |
98.4 |
12.7 |
42.9 |
69.8 |
27.7 |
11.1 |
15.9 |
15.9 |
4 |
| 1” |
25 |
49.2 |
107.9 |
14.3 |
50.8 |
79.4 |
34.5 |
12.7 |
17.5 |
15.9 |
4 |
| 1 ¼” |
32 |
58.7 |
117.5 |
15.9 |
63.5 |
88.9 |
43.2 |
14.3 |
20.6 |
15.9 |
4 |
| 1 ½” |
40 |
65.1 |
127.0 |
17.5 |
73.0 |
98.4 |
49.5 |
15.9 |
22.2 |
15.9 |
4 |
| 2” |
50 |
77.8 |
152.4 |
19.0 |
92.1 |
120.6 |
62.0 |
17.5 |
25.4 |
19.0 |
4 |
| 2 ½” |
65 |
90.5 |
177.8 |
22.2 |
104.8 |
139.7 |
74.7 |
19.0 |
28.6 |
19.0 |
4 |
| 3” |
80 |
107.9 |
190.5 |
23.8 |
127.0 |
152.4 |
90.7 |
20.6 |
30.2 |
19.0 |
4 |
| 4” |
100 |
134.9 |
230.0 |
23.8 |
157.2 |
190.5 |
116.1 |
23.8 |
33.3 |
19.0 |
8 |
| 5” |
125 |
163.5 |
254.0 |
23.8 |
185.7 |
215.9 |
143.8 |
23.8 |
36.5 |
22.2 |
8 |
| 6” |
150 |
192.1 |
279.4 |
25.4 |
215.9 |
241.3 |
170.7 |
27.0 |
39.7 |
22.2 |
8 |
| 8” |
200 |
246.1 |
342.9 |
28.6 |
269.9 |
298.4 |
221.5 |
31.7 |
44.4 |
22.2 |
8 |
| 10” |
250 |
304.8 |
406.4 |
30.2 |
323.8 |
361.9 |
276.3 |
33.3 |
49.2 |
25.4 |
12 |
| 12” |
300 |
365.1 |
482.6 |
31.8 |
381.0 |
431.8 |
327.1 |
39.7 |
55.6 |
25.4 |
12 |
| 14” |
350 |
400.0 |
533.4 |
34.9 |
412.7 |
476.2 |
359.1 |
41.3 |
57.1 |
28.6 |
12 |
| 16” |
400 |
457.2 |
596.9 |
36.5 |
469.9 |
539.7 |
410.5 |
44.4 |
63.5 |
28.6 |
16 |
| 18” |
450 |
504.8 |
635.0 |
39.7 |
533.4 |
577.8 |
461.8 |
49.2 |
68.3 |
31.7 |
16 |
| 20” |
500 |
558.8 |
698.5 |
42.9 |
584.2 |
635.0 |
513.1 |
54.0 |
73.0 |
31.7 |
20 |
| 24” |
600 |
663.6 |
812.8 |
47.6 |
692.1 |
749.3 |
615.9 |
63.5 |
82.5 |
34.9 |
20 |
| DIMENSIONS OF CLASS 300 FLANGES AS PER ANSI B 16.5 |
| NB |
a |
D |
B |
G |
K |
E |
F |
H |
L |
No. of Holes |
| ½” |
15 |
38.1 |
95.2 |
14.3 |
34.9 |
66.7 |
22.3 |
9.5 |
22.2 |
15.9 |
4 |
| ¾” |
20 |
47.6 |
117.5 |
15.9 |
42.9 |
82.5 |
27.7 |
11.1 |
25.4 |
19.0 |
4 |
| 1” |
25 |
54.0 |
123.8 |
17.5 |
50.8 |
88.9 |
34.5 |
12.7 |
27.0 |
19.0 |
4 |
| 1 ¼” |
32 |
63.5 |
133.3 |
19.0 |
63.5 |
98.4 |
43.2 |
14.3 |
27.0 |
19.0 |
4 |
| 1 ½” |
40 |
69.8 |
155.6 |
20.6 |
73.0 |
114.3 |
49.5 |
15.9 |
30.2 |
22.2 |
4 |
| 2” |
50 |
84.1 |
165.1 |
22.2 |
92.1 |
127.0 |
62.0 |
17.5 |
33.3 |
19.0 |
8 |
| 2 ½” |
65 |
100.0 |
190.5 |
25.4 |
104.8 |
149.2 |
74.7 |
19.0 |
38.1 |
22.2 |
8 |
| 3” |
80 |
117.5 |
209.5 |
28.6 |
127.0 |
168.3 |
90.7 |
20.6 |
42.9 |
22.2 |
8 |
| 4” |
100 |
146.0 |
254.0 |
31.8 |
157.2 |
200.0 |
116.1 |
23.8 |
47.6 |
22.2 |
8 |
| 5” |
125 |
177.8 |
279.4 |
34.9 |
185.7 |
234.9 |
143.8 |
23.8 |
50.8 |
22.2 |
8 |
| 6” |
150 |
206.4 |
317.5 |
36.5 |
215.9 |
269.9 |
170.7 |
27.0 |
52.4 |
22.2 |
12 |
| 8” |
200 |
260.3 |
381.0 |
41.3 |
269.9 |
330.2 |
221.5 |
31.7 |
61.9 |
25.4 |
12 |
| 10” |
250 |
320.7 |
444.5 |
47.6 |
323.8 |
387.3 |
276.3 |
33.3 |
66.7 |
28.6 |
16 |
| 12” |
300 |
374.6 |
520.7 |
50.8 |
381.0 |
450.8 |
327.1 |
39.7 |
73.0 |
31.7 |
16 |
| 14” |
350 |
425.4 |
584.2 |
54.0 |
412.7 |
514.3 |
359.1 |
41.3 |
76.2 |
31.7 |
20 |
| 16” |
400 |
482.6 |
647.7 |
57.2 |
469.9 |
571.5 |
410.5 |
44.4 |
82.5 |
34.9 |
20 |
| 18” |
450 |
533.4 |
711.2 |
60.3 |
533.4 |
628.5 |
461.8 |
49.2 |
88.9 |
34.9 |
24 |
| 20” |
500 |
587.4 |
774.7 |
63.5 |
584.2 |
685.8 |
513.1 |
54.0 |
95.2 |
34.9 |
24 |
| 24” |
600 |
701.7 |
914.4 |
69.8 |
692.1 |
812.8 |
615.9 |
63.5 |
106.4 |
41.3 |
24 |
| DIMENSIONS OF CLASS 600 FLANGES AS PER ANSI B 16.5 |
| NB |
a |
D |
B |
G |
K |
E |
F |
H |
L |
No. of Holes |
| ½” |
15 |
38.1 |
95.2 |
14.3 |
34.9 |
66.7 |
22.3 |
9.5 |
22.2 |
15.9 |
4 |
| ¾” |
20 |
47.6 |
117.5 |
15.9 |
42.9 |
82.5 |
27.7 |
11.1 |
25.4 |
19.0 |
4 |
| 1” |
25 |
54.0 |
123.8 |
17.5 |
50.8 |
88.9 |
34.5 |
12.7 |
27.0 |
19.0 |
4 |
| 1 ¼” |
32 |
63.5 |
133.3 |
20.6 |
63.5 |
98.4 |
43.2 |
14.3 |
28.6 |
19.0 |
4 |
| 1 ½” |
40 |
69.8 |
155.6 |
22.2 |
73.0 |
114.3 |
49.5 |
15.9 |
31.7 |
22.2 |
4 |
| 2” |
50 |
84.1 |
165.1 |
25.4 |
92.1 |
127.0 |
62.0 |
17.5 |
36.5 |
19.0 |
8 |
| 2 ½” |
65 |
100.0 |
190.5 |
28.6 |
104.8 |
149.2 |
74.7 |
19.0 |
41.3 |
22.2 |
8 |
| 3” |
80 |
117.5 |
209.5 |
31.8 |
127.0 |
168.3 |
90.7 |
20.6 |
46.0 |
22.2 |
8 |
| 4” |
100 |
152.4 |
273.0 |
38.1 |
157.2 |
215.9 |
116.1 |
23.8 |
54.0 |
25.4 |
8 |
| 5” |
125 |
188.9 |
330.2 |
44.4 |
185.7 |
266.7 |
143.8 |
23.8 |
60.3 |
28.6 |
8 |
| 6” |
150 |
222.2 |
355.6 |
47.6 |
215.9 |
292.1 |
170.7 |
27.0 |
66.7 |
28.6 |
12 |
| 8” |
200 |
273.0 |
419.1 |
55.6 |
269.9 |
349.2 |
221.5 |
31.7 |
76.2 |
31.7 |
12 |
| 10” |
250 |
342.9 |
508.0 |
63.5 |
323.8 |
431.8 |
276.3 |
33.3 |
85.7 |
34.9 |
16 |
| 12” |
300 |
400.0 |
558.8 |
66.7 |
381.0 |
488.9 |
327.1 |
39.7 |
92.1 |
34.9 |
20 |
| 14” |
350 |
431.8 |
603.2 |
69.9 |
412.7 |
527.0 |
359.1 |
41.3 |
93.7 |
38.1 |
20 |
| 16” |
400 |
495.3 |
685.8 |
75.2 |
469.9 |
603.2 |
410.5 |
44.4 |
106.4 |
41.3 |
20 |
| 18” |
450 |
546.0 |
742.9 |
82.6 |
533.4 |
654.0 |
461.8 |
49.2 |
117.5 |
44.4 |
20 |
| 20” |
500 |
609.6 |
812.8 |
88.9 |
584.2 |
723.9 |
513.1 |
54.0 |
127.0 |
44.4 |
24 |
| 24” |
600 |
717.6 |
939.8 |
101.6 |
692.1 |
838.2 |
615.9 |
63.5 |
139.7 |
50.8 |
24 |
All dimensions are in millimeters unless otherwise indicated.
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