WELD NECK FLANGES SERIES
Weld Neck Flanges Series Manufactures
S Nomi is a foremost and authorized company that produces outstanding quality Weld Neck Flanges Series A OR B products. Our team of professionals trusts in innovation, research-based production processes and quality.
S Nomi is one of the pioneering Weld Neck Flanges Series manufactures in Kolkata, West Bengal, Bihar, Odisha, Jharkhand, and exporter in Kolkata, India. Hence, we accompany quality training to match the most advanced expectations for the latest technology-based products.
Furthermore, along with quality, we ensure to offer products of different grades in an intact form without affecting its quality.
Therefore, we at S Nomi give a comprehensive range of quality flange products considering client requirements. Additionally, we give primary preference to our client’s operational conditions, and our expert controls the range of product specifications to gain their satisfaction and trust.
We have supplied Weld Neck Flanges Series in various cities and in different industries in Kolkata, West Bengal, Bihar, Odisha, Jharkhand.
Weld Neck Flanges are drilled(machined) with the wall thickness of the flange having the same dimensions of the matching pipe, the lighter the pipe is, the larger the bore, conversely, the heavier the pipe, the small the bore, they are normally used for high pressure, cold or hot temperature.
Stainless Steel:
ASTM / ASME SA 182 F 304, 304L, 304H, 309H, 310H, 316, 316H, 316L, 316 LN, 317, 317L, 321, 321H, 347, 347 H.
Duplex Steel:
ASTM / ASME SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61.
Nickel Alloy
ASTM / ASME SB 564 UNS 2200 (NICKEL 200), UNS 4400 (MONEL 400), UNS 8825 INCONEL (825), UNS 6600 (INCONEL 600), UNS 6601 (INCONEL 601), UNS 6625 (INCONEL 625), UNS 10276 (HASTELLOY C 276)
ASTM / ASME SB 160 UNS 2201 (NICKEL 201 )
ASTM / ASME SB 472 UNS 8020 (ALLOY 20 / 20 CB 3)
Copper Alloy
ASTM / ASME SB 61 UNS NO. C 92200 & ASTM / ASME SB 62 UNS NO. C 83600.
ASTM / ASME SB 151 UNS NO. 70600, 71500, C 70600 ( CU -NI- 90/10), C 71500 ( CU -NI- 70/30)
ASTM / ASME SB 152 UNS NO C 10100, C 10200, C 10300, C 10800, C 12000, C 12200.
Carbon Steel
ASTM / ASME A 105
ASTM / ASME A 350 LF 2
Alloy Steel
ASTM / ASME A 182 GR F 5, F 9, F 11, F 12, F 22, F 91
Dimensions
Welding neck flange bores according ASME/ANSI B16.5-1996 Pipe Flanges and 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 | – | – | – | – | – | – |