Standard - ANSI/ASME : ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48
DIN : DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638, DIN2673
B.S : BS4504, BS4504, BS1560, BS10
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.
Specialize :As per drawing
Stainless Steel Weld Neck A/B Flanges : ASTM A182, A240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L
Carbon Steel Weld Neck A/B 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, F70
Alloy Steel Weld Neck A/B Flanges : ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91
Duplex Steel Weld Neck A/B Flanges : ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61
Super Duplex Weld Neck A/B Flanges : ASTM / ASME A/SA 182, A240 F 44, F 45, F51, F 53, F 55, F 60, F 61
Nickel Alloy Weld Neck A/B Flanges : 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), Titanium (Grade I & II)
Copper Alloy Weld Neck A/B Flanges : UNS No. C10100, 10200, 10300, 10800, 12000, 12200, 70600, 71500, UNS No. C 70600 (Cu -Ni- 90/10), C 71500 (Cu-Ni-70/30)
Low Temperature Carbon Steel Weld Neck A/B Flanges : ASTM A350, LF2, LF3
Welding neck flange bores according ASME/ANSI B16.5-1996 Pipe Flanges & Flanged Fittings - can be found in the table below :
Welding Neck Flange Bores |
|||||||
Nominal Pipe Size (inches) |
Outside Diameter (inches) |
Inside Diameter (inches) |
|||||
Light Wall 1) |
Schedule 20 |
Schedule 30 |
Standard Wall |
Schedule 40 |
Schedule 60 |
||
1/2 |
0.840 |
0.674 |
- |
- |
0.622 |
0.622 |
- |
3/4 |
1.050 |
0.884 |
- |
- |
0.824 |
0.824 |
- |
1 |
1.315 |
1.097 |
- |
- |
1.049 |
1.049 |
- |
1 1/4 |
1.660 |
1.442 |
- |
- |
1.380 |
1.380 |
- |
1 1/2 |
1.900 |
1.682 |
- |
- |
1.610 |
1.610 |
- |
2 |
2.375 |
2.157 |
- |
- |
2.067 |
2.067 |
- |
2 1/2 |
2.875 |
2.635 |
- |
- |
2.469 |
2.469 |
- |
3 |
3.500 |
3.260 |
- |
- |
3.068 |
3.068 |
- |
3 1/2 |
4.000 |
3.760 |
- |
- |
3.548 |
3.548 |
- |
4 |
4.500 |
4.260 |
- |
- |
4.026 |
4.026 |
- |
5 |
5.563 |
5.295 |
- |
- |
5.047 |
5.047 |
- |
6 |
6.625 |
6.357 |
- |
- |
6.065 |
6.065 |
- |
8 |
8.625 |
8.329 |
8.125 |
8.071 |
7.981 |
7.981 |
7.813 |
10 |
10.750 |
10.420 |
10.250 |
10.136 |
10.020 |
10.020 |
9.750 |
12 |
12.750 |
12.390 |
12.250 |
12.090 |
12.000 |
11.938 |
11.626 |
14 |
14.000 |
13.500 |
13.376 |
13.250 |
13.250 |
13.124 |
12.812 |
16 |
16.000 |
15.500 |
15.376 |
15.250 |
15.250 |
15.000 |
14.688 |
18 |
18.000 |
17.500 |
17.376 |
17.124 |
17.250 |
16.876 |
16.500 |
20 |
20.000 |
19.500 |
19.250 |
19.000 |
19.250 |
18.812 |
18.376 |
24 |
24.000 |
23.500 |
23.250 |
22.876 |
23.250 |
22.624 |
22.062 |
30 |
30.000 |
29.376 |
29.000 |
28.750 |
29.250 |
- |
- |
36 |
36.000 |
35.376 |
35.000 |
34.750 |
35.250 |
34.500 |
- |
42 |
42.000 |
- |
- |
- |
41.250 |
- |
- |
48 |
48.000 |
- |
- |
- |
47.250 |
- |
- |
Welding Neck Flange Bores | ||||||||
Nominal Pipe Size (inches) |
Outside Diameter (inches) |
Inside Diameter (inches) |
||||||
Extra Strong |
Schedule 80 |
Schedule 100 |
Schedule 120 |
Schedule 140 |
Schedule 160 |
Double Extra Strong |
||
1/2 |
0.840 |
0.546 |
0.546 |
- |
- |
- |
0.464 |
0.252 |
3/4 |
1.050 |
0.742 |
0.742 |
- |
- |
- |
0.612 |
0.434 |
1 |
1.315 |
0.957 |
0.957 |
- |
- |
- |
0.815 |
0.599 |
1 1/4 |
1.660 |
1.278 |
1.278 |
- |
- |
- |
1.160 |
0.896 |
1 1/2 |
1.900 |
1.500 |
1.500 |
- |
- |
- |
1.338 |
1.100 |
2 |
2.375 |
1.939 |
1.939 |
- |
- |
- |
1.687 |
1.503 |
2 1/2 |
2.875 |
2.323 |
2.323 |
- |
- |
- |
2.125 |
1.771 |
3 |
3.500 |
2.900 |
2.900 |
- |
- |
- |
2.624 |
2.300 |
3 1/2 |
4.000 |
3.364 |
3.364 |
- |
- |
- |
- |
2.728 |
4 |
4.500 |
3.826 |
3.826 |
- |
3.624 |
- |
3.438 |
3.152 |
5 |
5.563 |
4.813 |
4.813 |
- |
4.563 |
- |
4.313 |
4.063 |
6 |
6.625 |
5.761 |
5.761 |
- |
5.501 |
- |
5.187 |
4.897 |
8 |
8.625 |
7.625 |
7.625 |
7.437 |
7.187 |
7.001 |
6.813 |
6.875 |
10 |
10.750 |
9.750 |
9.562 |
9.312 |
9.062 |
8.750 |
8.500 |
8.750 |
12 |
12.750 |
11.750 |
11.374 |
11.062 |
10.750 |
10.500 |
10.126 |
10.750 |
14 |
14.000 |
13.000 |
12.500 |
12.124 |
11.814 |
11.500 |
11.188 |
- |
16 |
16.000 |
15.000 |
14.312 |
13.938 |
13.564 |
13.124 |
12.812 |
- |
18 |
18.000 |
17.000 |
16.124 |
15.688 |
15.250 |
14.876 |
14.438 |
- |
20 |
20.000 |
19.000 |
17.938 |
17.438 |
17.000 |
16.500 |
16.062 |
- |
24 |
24.000 |
23.000 |
21.562 |
20.938 |
20.376 |
19.876 |
19.312 |
- |
30 |
30.000 |
29.000 |
- |
- |
- |
- |
- |
- |
36 |
36.000 |
35.000 |
- |
- |
- |
- |
- |
- |
42 |
42.000 |
41.000 |
- |
- |
- |
- |
- |
- |
48 |
48.000 |
47.000 |
- |
- |
- |
- |
- |
- |