ANSI/ASME B16.5 Slip On Flanges

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Kaizen Steel Industries is a leading manufacturer of high-quality industrial socket weld flanges in India, meeting ASME/ANSI/DIN standards. We offer fast delivery for standard sizes of carbon steel and stainless steel socket weld flanges. For special requirements, such as stainless steel grades, nickel alloys, and alloy steel, we provide timely delivery from stock.

Our socket weld flanges follow the dimensions specified in ASME B16.5, which includes sizes from NPS ½” to 24”. For larger sizes, from NPS 26” to 60”, the dimensions adhere to ASME B16.47.

JIS socket weld flanges are similar in shape to slip-on flanges but have a counter-bored bore to fit the pipe. These flanges are commonly used for smaller, high-pressure pipes. ASME B16.5 socket weld flanges are ideal for high-pressure systems, such as hydraulic equipment and steam lines. They are attached by inserting the pipe into the socket end and welding around the flange’s hub, which ensures a smooth flow of fluids or gases. In high-stress situations, an internal weld may be added for extra strength.

We produce Raised Face and Flat Face socket weld flanges at our facility for various industries, including power generation, petrochemical plants, pharmaceutical plants, shipbuilding, oil refineries, wastewater treatment plants, paper mills, and turnkey projects.  

Socket Weld Flange Specification

Dimensions  ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
Size  1/2″ (15 NB) to 48″ (1200NB)
Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc.
DIN DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636,DIN2637, DIN2638, DIN2673
BS BS4504 , BS4504, BS1560, BS10
Coating/Surface Treatment Antirust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized
Flange Face Type Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
Value Added Services CNC Machining, Customised Flanges

ANSI B16.5 Socket Weld Flange Material & Grades

Category Specifications
Stainless Steel Socket Weld Flanges ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L
Duplex & Super Duplex Steel Socket Weld Pipe Flanges ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61
Carbon Steel Socket Weld Flanges ASTM / ASME A/SA 105, ASTM / ASME A 350, ASTM A 181 LF 2 / A516 Gr.70 A36, A694 F42, F46, F52, F60, F65, F706
Low Temperature Carbon Steel Socket Weld Flanges ASTM A350, LF2, LF3
Alloy Steel Socket Weld Flanges ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91
Copper Alloy Steel Socket Weld Flanges ASTM SB 61, SB62, SB151, SB152 UNS No. C 70600 (Cu-Ni 90/10), C 71500 (Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200
Nickel Alloy Socket Weld Pipe Flanges ASTM SB564, SB160, SB472, SB162 Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020)

ANSI B16.5 Socket Weld Flange Dimensions

ANSI, ASME, ASA B16.5 150lb/sq.in. SOCKET WELD FLANGE RF
Nominal Size
Outside Diam.
Thick. of Flange
Diam. of Raised Face
Diam of Hub at Base
Length Thru Hub
Diam. of Bore
Depth of Socket
No. of Holes
Diam. of Holes
Approx. Weight Pounds Kg
O
C
R
X
Y
B
D
1/2″
in.
3.5
0.44
1.38
1.19
0.62
0.88
0.38
4
0.62
1
mm.
88.9
11.2
35.1
30.2
15.7
22.4
9.7
15.7
0.5
3/4″
in.
3.88
0.5
1.69
1.5
0.62
1.09
0.44
4
0.62
2
mm.
98.6
12.7
42.9
38.1
15.7
27.7
11.2
15.7
1
1″
in.
4.25
0.56
2
1.94
0.69
1.36
0.5
4
0.62
2
mm.
108
14.2
50.8
49.3
17.5
34.5
12.7
15.7
1
1 1/4″
in.
4.62
0.62
2.5
2.31
0.81
1.7
0.56
4
0.62
3
mm.
117.3
15.7
63.5
58.7
20.6
43.2
14.2
15.7
1
1 1/2″
in.
5
0.69
2.88
2.56
0.88
1.95
0.62
4
0.62
3
mm.
127
17.5
73.2
65
22.4
49.5
15.7
15.7
1
2″
in.
6
0.75
3.62
3.06
1
2.44
0.69
4
0.75
5
mm.
152.4
19.1
91.9
77.7
25.4
62
17.5
19.1
2
2 1/2″
in.
7
0.88
4.12
3.56
1.12
2.94
0.75
4
0.75
7
mm.
177.8
22.4
104.6
90.4
28.4
74.7
19.1
19.1
3
3″
in.
7.5
0.94
5
4.25
1.19
3.57
0.81
4
0.75
8
mm.
190.5
23.9
127
108
30.2
90.7
20.6
19.1
4
3 1/2″
in.
8.5
0.94
5.5
4.81
1.25
4.07
8
0.75
11
mm.
215.9
23.9
139.7
122.2
31.8
103.4
19.1
5
4″
in.
9
0.94
6.19
5.31
1.31
4.57
8
0.75
13
mm.
228.6
23.9
157.2
134.9
33.3
116.1
19.1
6
5″
in.
10
0.94
7.31
6.44
1.44
5.66
8
0.88
15
mm.
254
23.9
185.7
163.6
36.6
143.8
22.4
7
6″
in.
11
1
8.5
7.56
1.56
6.72
8
0.88
19
mm.
279.4
25.4
215.9
192
39.6
170.7
22.4
9
8″
in.
13.5
1.12
10.62
9.69
1.75
8.72
8
0.88
30
mm.
342.9
28.4
269.7
246.1
44.5
221.5
22.4
14
10″
in.
16
1.19
12.75
12
1.94
10.88
12
1
43
mm.
406.4
30.2
323.9
304.8
49.3
276.4
25.4
20
12″
in.
19
1.25
15
14.38
2.19
12.88
12
1
64
mm.
482.6
31.8
381
365.3
55.6
327.2
25.4
29
14″
in.
21
1.38
16.25
15.75
2.25
14.14
12
1.12
90
mm.
533.4
35.1
412.8
400.1
57.2
359.2
28.4
41
16″
in.
23.5
1.44
18.5
18
2.5
16.16
16
1.12
98
mm.
596.9
36.6
469.9
457.2
63.5
410.5
28.4
44
18″
in.
25
1.56
21
19.88
2.69
18.18
16
1.25
130
mm.
635
39.6
533.4
505
68.3
461.8
31.8
59
20″
in.
27.5
1.69
23
22
2.88
20.2
20
1.25
165
mm.
698.5
42.9
584.2
558.8
73.2
513.1
31.8
75
24″
in.
32
1.88
27.25
26.12
3.25
24.25
20
1.38
220
mm.
812.8
47.8
692.2
663.4
82.6
616
35.1
100

150 lb Socket Weld Flange Dimensions

ANSI, ASME, ASA B16.5 1500lb/sq.in. SOCKET WELD FLANGE
Nominal Size
Outside Diam.
Thick. of Flange
Diam. of Raised Face
Diam of Hub at Base
Length Thru Hub
Diam. of Bore
Depth of Socket
No. of Holes
Diam. of Holes
Approx. Weight Pounds Kg
O
C
R
X
Y
B
D
1/2″
in.
4.75
0.88
1.38
1.5
1.25
0.88
0.38
4
0.88
4
mm.
120.7
22.4
35.1
38.1
31.8
22.4
9.7
22.4
2
3/4″
in.
5.12
1
1.69
1.75
1.38
1.09
0.44
4
0.88
5
mm.
130
25.4
42.9
44.5
35.1
27.7
11.2
22.4
2
1″
in.
5.88
1.12
2
2.06
1.62
1.36
0.5
4
1
8
mm.
149.4
28.4
50.8
52.3
41.1
34.5
12.7
25.4
4
1 1/4″
in.
6.25
1.12
2.5
2.5
1.62
1.7
0.56
4
1
9
mm.
158.8
28.4
63.5
63.5
41.1
43.2
14.2
25.4
4
1 1/2″
in.
7
1.25
2.88
2.75
1.75
1.95
0.62
4
1.12
12
mm.
177.8
31.8
73.2
69.9
44.5
49.5
15.7
28.4
5
2″
in.
8.5
1.5
3.62
4.12
2.25
2.44
0.69
8
1
25
mm.
215.9
38.1
91.9
104.6
57.2
62
17.5
25.4
11
2 1/2″
in.
9. 2
1. 2
4. 2
4. 8
2.5
2. 4
0. 5
8
1. 2
36
mm.
244.3
41.1
104.6
124
63.5
74.7
19.1
28.4
16
3″
in.
10.5
1.88
5
5.25
2.88
8
1.25
48
mm.
266.7
47.8
127
133.4
73.2
31.8
22
4″
in.
12.25
2.12
6.19
6.38
3.56
8
1.38
73
mm.
311.2
53.8
157.2
162.1
90.4
35.1
33
5″
in.
14.75
2.88
7.31
7.75
4.12
8
1.62
130
mm.
374.7
73.2
185.7
196.9
104.6
41.1
59
6″
in.
15.5
3.25
8.5
9
4.69
12
1.5
165
mm.
393.7
82.6
215.9
228.6
119.1
38.1
75
8″
in.
19
3.62
10.62
11.5
5.62
12
1.75
260
mm.
482.6
91.9
269.7
292.1
142.7
44.5
118
10″
in.
23
4.25
12.75
14.5
6.25
12
2
435
mm.
584.2
108
323.9
368.3
158.8
50.8
197
12″
in.
26.5
4.88
15
17.75
7.12
16
2.12
580
mm.
673.1
124
381
450.9
180.8
53.8
263
14″
in.
29.5
5.25
16.25
19.5
16
2.38
mm.
749.3
133.4
412.8
495.3
60.5
16″
in.
32.5
5.75
18.5
21.75
16
2.62
mm.
825.5
146.1
469.9
552.5
66.5
18″
in.
36
6.38
21
23.5
16
2.88
mm.
914.4
162.1
533.4
596.9
73.2
20″
in.
38.75
7
23
25.25
16
3.12
mm.
984.3
177.8
584.2
641.4
79.2
24″
in.
46
8
27.25
30
16
3.62
mm.
1168.4
203.2
692.2
762
91.9

Socket Weld Flange Dimensions Class 300

ANSI, ASME, ASA B16.5 300lb/sq.in. SOCKET WELD FLANGE RF
Nominal Size
Outside Diam.
Thick. of Flange
Diam. of Raised Face
Diam of Hub at Base
Length Thru Hub
Diam. of Bore
Depth of Socket
No. of Holes
Diam. of Holes
Approx. Weight Pounds Kg
O
C
R
X
Y
B
D
1/2″
in.
3.75
0.56
1.38
1.5
0.88
0.88
0.38
4
0.62
2
mm.
95.3
14.2
35.1
38.1
22.4
22.4
9.7
15.7
1
3/4″
in.
4.62
0.62
1.69
1.88
1
1.09
0.44
4
0.75
3
mm.
117.3
15.7
42.9
47.8
25.4
27.7
11.2
19.1
1
1″
in.
4.88
0.69
2
2.12
1.06
1.36
0.5
4
0.75
3
mm.
124
17.5
50.8
53.8
26.9
34.5
12.7
19.1
1
1 1/4″
in.
5.25
0.75
2.5
2.5
1.06
1.7
0.56
4
0.75
4
mm.
133.4
19.1
63.5
63.5
26.9
43.2
14.2
19.1
2
1 1/2″
in.
6.12
0.81
2.88
2.75
1.19
1.95
0.62
4
0.88
6
mm.
155.4
20.6
73.2
69.9
30.2
49.5
15.7
22.4
3
2″
in.
6.5
0.88
3.62
3.31
1.31
2.44
0.69
8
0.75
7
mm.
165.1
22.4
91.9
84.1
33.3
62
17.5
19.1
3
2 1/2″
in.
7.5
1
4.12
3.94
1.5
2.94
0.75
8
0.88
10
mm.
190.5
25.4
104.6
100.1
38.1
74.7
19.1
22.4
5
3″
in.
8.25
1.12
5
4.62
1.69
3.57
0.81
8
0.88
13
mm.
209.6
28.4
127
117.3
42.9
90.7
20.6
22.4
6
3 1/2″
in.
9
1.19
5.5
5.25
1.75
4.07
8
0.88
17
mm.
228.6
30.2
139.7
133.4
44.5
103.4
22.4
8
4″
in.
10
1.25
6.19
5.75
1.88
4.57
8
0.88
22
mm.
254
31.8
157.2
146.1
47.8
116.1
22.4
10
5″
in.
11
1.38
7.31
7
2
5.66
8
0.88
28
mm.
279.4
35.1
185.7
177.8
50.8
143.8
22.4
13
6″
in.
12.5
1.44
8.5
8.12
2.06
6.72
12
0.88
39
mm.
317.5
36.6
215.9
206.2
52.3
170.7
22.4
18
8″
in.
15
1.62
10.62
10.25
2.44
8.72
12
1
58
mm.
381
41.1
269.7
260.4
62
221.5
25.4
26
10″
in.
17.5
1.88
12.75
12.62
2.62
10.88
16
1.12
81
mm.
444.5
47.8
323.9
320.5
66.5
276.4
28.4
37
12″
in.
20.5
2
15
14.75
2.88
12.88
16
1.25
115
mm.
520.7
50.8
381
374.7
73.2
327.2
31.8
52
14″
in.
23
2.12
16.25
16.75
3
14.14
20
1.25
165
mm.
584.2
53.8
412.8
425.5
76.2
359.2
31.8
75
16″
in.
25.5
2.25
18.5
19
3.25
16.16
20
1.38
190
mm.
647.7
57.2
469.9
482.6
82.6
410.5
35.1
86
18″
in.
28
2.38
21
21
3.5
18.18
24
1.38
250
mm.
711.2
60.5
533.4
533.4
88.9
461.8
35.1
113
20″
in.
30.5
2.5
23
23.12
3.75
20.2
24
1.38
315
mm.
774.7
63.5
584.2
587.2
95.3
513.1
35.1
143
24″
in.
36
2.75
27.25
27.62
4.19
24.25
24
1.62
475
mm.
914.4
69.9
692.2
701.5
106.4
616
41.1
215

Socket Weld Flange Class 600 Dimensions

ANSI, ASME, ASA B16.5 600lb/sq.in. SOCKET WELD FLANGE
Nominal Size
Outside Diam.
Thick. of Flange
Diam. of Raised Face
Diam of Hub at Base
Length Thru Hub
Diam. of Bore
Depth of Socket
No. of Holes
Diam. of Holes
Approx. Weight Pounds Kg
O
C
R
X
Y
B
D
1/2″
in.
3.75
0.56
1.38
1.5
0.88
0.88
0.38
4
0.62
2
mm.
95.3
14.2
35.1
38.1
22.4
22.4
9.7
15.7
1
3/4″
in.
4.62
0.62
1.69
1.88
1
1.09
0.44
4
0.75
3
mm.
117.3
15.7
42.9
47.8
25.4
27.7
11.2
19.1
1
1″
in.
4.88
0.69
2
2.12
1.06
1.36
0.5
4
0.75
4
mm.
124
17.5
50.8
53.8
26.9
34.5
12.7
19.1
2
1 1/4″
in.
5.25
0.81
2.5
2.5
1.12
1.7
0.56
4
0.75
5
mm.
133.4
20.6
63.5
63.5
28.4
43.2
14.2
19.1
2
1 1/2″
in.
6.12
0.88
2.88
2.75
1.25
1.95
0.62
4
0.88
7
mm.
155.4
22.4
73.2
69.9
31.8
49.5
15.7
22.4
3
2″
in.
6.5
1
3.62
3.31
1.44
2.44
0.69
8
0.75
9
mm.
165.1
25.4
91.9
84.1
36.6
62
17.5
19.1
4
2 1/2″
in.
7.5
1.12
4.12
3.94
1.62
2.94
0.75
8
0.88
13
mm.
190.5
28.4
104.6
100.1
41.1
74.7
19.1
22.4
6
3″
in.
8.25
1.25
5
4.62
1.81
3.57
0.81
8
0.88
16
mm.
209.6
31.8
127
117.3
46
90.7
20.6
22.4
7
3 1/2″
in.
9
1.38
5.5
5.25
1.94
4.07
8
1
21
mm.
228.6
35.1
139.7
133.4
49.3
103.4
25.4
10
4″
in.
10.75
1.5
6.19
6
2.12
4.57
8
1
37
mm.
273.1
38.1
157.2
152.4
53.8
116.1
25.4
17
5″
in.
13
1.75
7.31
7.44
2.38
5.66
8
1.12
63
mm.
330.2
44.5
185.7
189
60.5
143.8
28.4
29
6″
in.
14
1.88
8.5
8.75
2.62
6.72
12
1.12
80
mm.
355.6
47.8
215.9
222.3
66.5
170.7
28.4
36
8″
in.
16.5
2.19
10.62
10.75
3
8.72
12
1.25
115
mm.
419.1
55.6
269.7
273.1
76.2
221.5
31.8
52
10″
in.
20
2.5
12.75
13.5
3.38
10.88
16
1.38
170
mm.
508
63.5
323.9
342.9
85.9
276.4
35.1
77
12″
in.
22
2.62
15
15.75
3.62
12.88
20
1.38
200
mm.
558.8
66.5
381
400.1
91.9
327.2
35.1
91
14″
in.
23.75
2.75
16.25
17
3.69
14.14
20
1.5
230
mm.
603.3
69.9
412.8
431.8
93.7
359.2
38.1
104
16″
in.
27
3
18.5
19.5
4.19
16.16
20
1.62
330
mm.
685.8
76.2
469.9
495.3
106.4
410.5
41.1
150
18″
in.
29.25
3.25
21
21.5
4.62
18.18
20
1.75
400
mm.
743
82.6
533.4
546.1
117.3
461.8
44.5
181
20″
in.
32
3.5
23
24
5
20.2
24
1.75
510
mm.
812.8
88.9
584.2
609.6
127
513.1
44.5
231
24″
in.
37
4
27.25
28.25
5.5
24.25
24
2
730
mm.
939.8
101.6
692.2
717.6
139.7
616
50.8
331

1500 LB Socket Weld Flange Dimensions

ANSI, ASME, ASA B16.5 1500lb/sq.in. SOCKET WELD FLANGE
Nominal Size
Outside Diam.
Thick. of Flange
Diam. of Raised Face
Diam of Hub at Base
Length Thru Hub
Diam. of Bore
Depth of Socket
No. of Holes
Diam. of Holes
Approx. Weight Pounds Kg
O
C
R
X
Y
B
D
1/2″
in.
4.75
0.88
1.38
1.5
1.25
0.88
0.38
4
0.88
4
mm.
120.7
22.4
35.1
38.1
31.8
22.4
9.7
22.4
2
3/4″
in.
5.12
1
1.69
1.75
1.38
1.09
0.44
4
0.88
5
mm.
130
25.4
42.9
44.5
35.1
27.7
11.2
22.4
2
1″
in.
5.88
1.12
2
2.06
1.62
1.36
0.5
4
1
8
mm.
149.4
28.4
50.8
52.3
41.1
34.5
12.7
25.4
4
1 1/4″
in.
6.25
1.12
2.5
2.5
1.62
1.7
0.56
4
1
9
mm.
158.8
28.4
63.5
63.5
41.1
43.2
14.2
25.4
4
1 1/2″
in.
7
1.25
2.88
2.75
1.75
1.95
0.62
4
1.12
12
mm.
177.8
31.8
73.2
69.9
44.5
49.5
15.7
28.4
5
2″
in.
8.5
1.5
3.62
4.12
2.25
2.44
0.69
8
1
25
mm.
215.9
38.1
91.9
104.6
57.2
62
17.5
25.4
11
2 1/2″
in.
9. 2
1. 2
4. 2
4. 8
2.5
2. 4
0. 5
8
1. 2
36
mm.
244.3
41.1
104.6
124
63.5
74.7
19.1
28.4
16
3″
in.
10.5
1.88
5
5.25
2.88
8
1.25
48
mm.
266.7
47.8
127
133.4
73.2
31.8
22
4″
in.
12.25
2.12
6.19
6.38
3.56
8
1.38
73
mm.
311.2
53.8
157.2
162.1
90.4
35.1
33
5″
in.
14.75
2.88
7.31
7.75
4.12
8
1.62
130
mm.
374.7
73.2
185.7
196.9
104.6
41.1
59
6″
in.
15.5
3.25
8.5
9
4.69
12
1.5
165
mm.
393.7
82.6
215.9
228.6
119.1
38.1
75
8″
in.
19
3.62
10.62
11.5
5.62
12
1.75
260
mm.
482.6
91.9
269.7
292.1
142.7
44.5
118
10″
in.
23
4.25
12.75
14.5
6.25
12
2
435
mm.
584.2
108
323.9
368.3
158.8
50.8
197
12″
in.
26.5
4.88
15
17.75
7.12
16
2.12
580
mm.
673.1
124
381
450.9
180.8
53.8
263
14″
in.
29.5
5.25
16.25
19.5
16
2.38
mm.
749.3
133.4
412.8
495.3
60.5
16″
in.
32.5
5.75
18.5
21.75
16
2.62
mm.
825.5
146.1
469.9
552.5
66.5
18″
in.
36
6.38
21
23.5
16
2.88
mm.
914.4
162.1
533.4
596.9
73.2
20″
in.
38.75
7
23
25.25
16
3.12
mm.
984.3
177.8
584.2
641.4
79.2
24″
in.
46
8
27.25
30
16
3.62
mm.
1168.4
203.2
692.2
762
91.9

2500 LB Socket Weld Flange Dimensions

Pipe Normal Diam. O.D. Flange Thk. Of Flange Min Diam. of Hub Diameter of Raised Face Hub Diam. Chamfer of W.N Length Hub.Y Bore Diam. of Bolt Circle Diam. of Bolt Holes Number of Bolts Diam. of Bolts (inch) KG LB
inch dn O C X G A Y B BC BH BN BD
1/2″ 15 89.00 11.20 30.20 35.10 21.30 47.80 15.80 60.50 15.80 4 1/2″ 0.7 1.5
3/4″ 20 98.50 12.70 38.10 42.90 26.70 52.30 20.80 69.90 15.80 4 1/2″ 0.8 1.8
1″ 25 108.00 14.20 49.30 50.80 33.50 55.60 26.70 79.30 15.80 4 1/2″ 1.1 2.4
1-1/4″ 32 117.50 15.70 58.70 63.50 42.20 57.20 35.10 88.90 15.80 4 1/2″ 1.5 3.3
1-1/2″ 40 127.00 17.50 65.00 73.20 48.30 62.00 40.90 98.60 15.80 4 1/2″ 1.8 4
2″ 50 152.50 19.10 77.70 91.90 60.50 63.50 52.60 120.70 19.10 4 5/8″ 2.7 6
2-1/2″ 65 178.00 22.40 90.40 104.60 73.20 69.90 62.70 139.70 19.10 4 5/8″ 4.4 9.8
3″ 80 190.50 23.90 108.00 127.00 88.90 69.90 78.00 152.40 19.10 4 5/8″ 5.2 11.5
3-1/2″ 90 216.00 23.90 122.20 139.70 101.60 71.40 90.20 177.80 19.10 8 5/8″ 6.4 14.2
4″ 100 228.50 23.90 134.90 157.20 114.30 76.20 102.40 190.50 19.10 8 5/8″ 7.5 16.6
5″ 125 254.00 23.90 163.60 185.70 141.20 88.90 128.30 215.90 22.40 8 3/4″ 9.2 20.2
6″ 150 279.50 25.40 192.00 215.90 168.40 88.90 154.20 241.30 22.40 8 3/4″ 11 24.3
8″ 200 343.00 28.40 246.10 269.70 219.20 101.60 202.70 298.50 22.40 8 3/4″ 18.4 40.6
10″ 250 406.50 30.20 304.80 323.90 273.10 101.60 254.50 362.00 25.40 12 7/8″ 25.5 56.2
12″ 300 482.50 31.80 365.30 381.00 323.90 114.30 304.80 431.80 25.40 12 7/8″ 37 81.4
14″ 350 533.50 35.10 400.10 412.80 355.60 127.00 476.30 28.50 12 1″ 51 113
16″ 400 597.00 36.60 457.20 469.90 406.40 127.00 539.80 28.50 16 1″ 61.5 136
18″ 450 635.00 39.60 505.00 533.40 457.20 139.70 577.90 31.80 16 1 1/8″ 71.5 158
20″ 500 698.50 42.90 558.80 584.20 508.00 144.50 635.00 31.80 20 1 1/8″ 85 187
24″ 600 813.00 47.80 663.40 692.20 609.60 152.40 749.30 35.10 20 1 1/4″ 119 262

JIS Socket Weld Flange Dimensions

Nominal Size Outside diameter of flange Diameter of bolt hole centre circle Diamter of bolt hole Number of bolt Nominal desig-nation of thread of bolt Inside diameter Inside diameter Depth of socket Thickness of Flange Diameter of hub Small diameter side Diameter of hub Large diamter side Totle length of flange Radius of fillet
A D C h d0 d(18) S t a b T r
10 15 20 90 95 100 65 70 75 15 15 15 4 4 4 M12 M12 M12 17.8 22.2 27.7 12.7 16.1 21.6 10 10 13 12 12 14 23 27 33 26 30 36 16 16 20 4 4 4
25 32 40 125 135 140 90 100 105 19 19 19 4 4 4 M16 M16 M16 34.5 43.2 49.1 27.6 35.7 41.6 13 13 13 14 16 16 41 50 56 44 53 60 20 22 24 4 4 4
50 65 80 155 175 185 120 140 150 19 19 19 4 4 8 M16 M16 M16 61.1 77.1 90.0 52.9 67.9 80.7 16 16 16 16 18 18 69 86 99 73 91 105 24 27 30 4 4 4

Socket Weld Flange Pressure Ratings

Flanges pressure rating in psig for Socket Weld Flange ASME
Temperature (F°) 150# 300# 400# 600# 900# 1500# 2500#
-20 to 100 285 740 985 1480 2220 3705 6170
200 260 680 905 1360 2035 3395 5655
300 230 655 870 1310 1965 3270 5450
400 200 635 845 1265 1900 3170 5280
500 170 605 805 1205 1810 3015 5025
600 140 570 755 1135 1705 2840 4730
650 125 550 730 1100 1650 2745 4575
700 110 530 710 1060 1590 2655 4425
750 95 505 675 1015 1520 2535 4230
800 80 410 550 825 1235 2055 3430
850 65 320 425 640 955 1595 2655
900 50 230 305 460 690 1150 1915
950 35 135 185 275 410 685 1145
1000 20 85 115 170 255 430 715

Applications of Socket Weld Flanges

  • ANSI B16.5 Class 150 Socket Weld Flange: Used in the industrial boilers industry.
  • ASTM A182 Stainless Steel Socket Weld Flange: Utilized in power plants.
  • ASME B16.47 Series A and B Socket Weld Flange: Commonly used in nuclear plants.
  • Stainless Steel Socket Weld Flange: Applied in the oil and gas industry.
  • Super Duplex Steel Socket Weld Flange: Found in refineries.
  • Industrial Socket Weld Flange: Used in shipbuilding.
  • Super Duplex Steel Socket Weld Forged Flange: Ideal for heat exchangers.
  • Carbon Steel Industrial Socket Weld Flange: Used in condensers.
  • Alloy Steel Industrial Socket Weld Flange: Applied in the paper and pulp industry.
  • Duplex Steel Industrial Socket Weld Flange: Suitable for marine applications.
  • Stainless Steel Industrial Socket Weld Flange: Used in nuclear power plants.
  • Industrial Socket Weld Flange/Fittings System: Used in fossil fuel power plants.

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