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Weld Neck

Stainless Steel Weld Neck Flanges – EN1092-1 & ANSI B16.5

Integraflow supplies stainless steel weld neck flanges in 304 (1.4301) and 316L (1.4404) grades, manufactured to both EN1092-1 and ANSI/ASME B16.5 standards with pressure ratings from PN6 to PN40 and 150lb to 1500lb, providing a high-strength, welded connection solution for critical applications in industrial, hygienic, and process pipework systems.

DN100 (4 NB) SCHEDULE 80S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 254.0mm
Flange thickness (C): 31.7mm
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DN100 (4" NB) SCHEDULE 10S ASA150 WELD NECK FLANGE SS 304
Outside diameter (O): 228.6mm
Flange thickness (C): 23.8mm
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£ 254.96 per item 254.96 GBP
DN100 (4" NB) SCHEDULE 10S ASA150 WELD NECK FLANGE SS 316
Outside diameter (O): 228.6mm
Flange thickness (C): 23.8mm
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£ 226.68 per item 226.68 GBP
DN100 (4" NB) SCHEDULE 10S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 254.0mm
Flange thickness (C): 31.7mm
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DN100 (4" NB) SCHEDULE 10S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 254.0mm
Flange thickness (C): 31.7mm
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£ 571.80 per item 571.8 GBP
DN100 (4" NB) SCHEDULE 40S ASA150 WELD NECK FLANGE SS 304
Outside diameter (O): 228.6mm
Flange thickness (C): 23.8mm
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£ 219.12 per item 219.12 GBP
DN100 (4" NB) SCHEDULE 40S ASA150 WELD NECK FLANGE SS 316
Outside diameter (O): 228.6mm
Flange thickness (C): 23.8mm
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£ 402.76 per item 402.76 GBP
DN100 (4" NB) SCHEDULE 40S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 254.0mm
Flange thickness (C): 31.7mm
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DN100 (4" NB) SCHEDULE 40S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 254.0mm
Flange thickness (C): 31.7mm
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£ 503.72 per item 503.72 GBP
DN100 (4" NB) SCHEDULE 80S ASA150 WELD NECK FLANGE SS 304
Outside diameter (O): 228.6mm
Flange thickness (C): 23.8mm
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DN100 (4" NB) SCHEDULE 80S ASA150 WELD NECK FLANGE SS 316
Outside diameter (O): 228.6mm
Flange thickness (C): 23.8mm
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DN100 (4" NB) SCHEDULE 80S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 254.0mm
Flange thickness (C): 31.7mm
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DN125 (5 NB) SCHEDULE 80S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 279.4mm
Flange thickness (C): 35.0mm
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DN125 (5" NB) SCHEDULE 10S ASA150 WELD NECK FLANGE SS 304
Outside diameter (O): 254.0mm
Flange thickness (C): 23.8mm
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£ 314.48 per item 314.48 GBP
DN125 (5" NB) SCHEDULE 10S ASA150 WELD NECK FLANGE SS 316
Outside diameter (O): 254.0mm
Flange thickness (C): 23.8mm
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£ 293.56 per item 293.56 GBP
DN125 (5" NB) SCHEDULE 10S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 279.4mm
Flange thickness (C): 35.0mm
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DN125 (5" NB) SCHEDULE 10S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 279.4mm
Flange thickness (C): 35.0mm
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£ 746.92 per item 746.92 GBP
DN125 (5" NB) SCHEDULE 40S ASA150 WELD NECK FLANGE SS 304
Outside diameter (O): 254.0mm
Flange thickness (C): 23.8mm
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£ 351.56 per item 351.56 GBP
DN125 (5" NB) SCHEDULE 40S ASA150 WELD NECK FLANGE SS 316
Outside diameter (O): 254.0mm
Flange thickness (C): 23.8mm
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£ 473.68 per item 473.68 GBP
DN125 (5" NB) SCHEDULE 40S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 279.4mm
Flange thickness (C): 35.0mm
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DN125 (5" NB) SCHEDULE 40S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 279.4mm
Flange thickness (C): 35.0mm
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£ 772.68 per item 772.68 GBP
DN125 (5" NB) SCHEDULE 80S ASA150 WELD NECK FLANGE SS 304
Outside diameter (O): 254.0mm
Flange thickness (C): 23.8mm
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DN125 (5" NB) SCHEDULE 80S ASA150 WELD NECK FLANGE SS 316
Outside diameter (O): 254.0mm
Flange thickness (C): 23.8mm
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DN125 (5" NB) SCHEDULE 80S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 279.4mm
Flange thickness (C): 35.0mm
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DN15 (1/2 NB) SCHEDULE 10S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 95.2mm
Flange thickness (C): 14.2mm
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DN15 (1/2 NB) SCHEDULE 10S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 95.2mm
Flange thickness (C): 14.2mm
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£ 32.08 per item 32.08 GBP
DN15 (1/2 NB) SCHEDULE 40S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 95.2mm
Flange thickness (C): 14.2mm
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DN15 (1/2 NB) SCHEDULE 40S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 95.2mm
Flange thickness (C): 14.2mm
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£ 31.80 per item 31.8 GBP
DN15 (1/2 NB) SCHEDULE 80S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 95.2mm
Flange thickness (C): 14.2mm
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DN15 (1/2 NB) SCHEDULE 80S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 95.2mm
Flange thickness (C): 14.2mm
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DN15 (1/2" NB) SCHEDULE 10S ASA150 WELD NECK FLANGE SS 304
Outside diameter (O): 88.9mm
Flange thickness (C): 11.1mm
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£ 22.72 per item 22.72 GBP
DN15 (1/2" NB) SCHEDULE 10S ASA150 WELD NECK FLANGE SS 316
Outside diameter (O): 88.9mm
Flange thickness (C): 11.1mm
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£ 26.16 per item 26.16 GBP
DN15 (1/2" NB) SCHEDULE 40S ASA150 WELD NECK FLANGE SS 304
Outside diameter (O): 88.9mm
Flange thickness (C): 11.1mm
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£ 23.16 per item 23.16 GBP
DN15 (1/2" NB) SCHEDULE 40S ASA150 WELD NECK FLANGE SS 316
Outside diameter (O): 88.9mm
Flange thickness (C): 11.1mm
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£ 21.44 per item 21.44 GBP
DN15 (1/2" NB) SCHEDULE 80S ASA150 WELD NECK FLANGE SS 304
Outside diameter (O): 88.9mm
Flange thickness (C): 11.1mm
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DN15 (1/2" NB) SCHEDULE 80S ASA150 WELD NECK FLANGE SS 316
Outside diameter (O): 88.9mm
Flange thickness (C): 11.1mm
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DN150 (6 NB) SCHEDULE 80S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 317.5mm
Flange thickness (C): 36.5mm
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DN150 (6" NB) SCHEDULE 10S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 317.5mm
Flange thickness (C): 36.5mm
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DN150 (6" NB) SCHEDULE 10S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 317.5mm
Flange thickness (C): 36.5mm
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£ 963.80 per item 963.8 GBP
DN150 (6" NB) SCHEDULE 40S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 317.5mm
Flange thickness (C): 36.5mm
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DN150 (6" NB) SCHEDULE 40S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 317.5mm
Flange thickness (C): 36.5mm
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£ 1,037.48 per item 1037.48 GBP
DN150 (6" NB) SCHEDULE 80S ASA150 WELD NECK FLANGE SS 304
Outside diameter (O): 279.4mm
Flange thickness (C): 25.4mm
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DN150 (6" NB) SCHEDULE 80S ASA150 WELD NECK FLANGE SS 316
Outside diameter (O): 279.4mm
Flange thickness (C): 25.4mm
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DN150 (6" NB) SCHEDULE 80S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 317.5mm
Flange thickness (C): 36.5mm
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DN20 (3/4 NB) SCHEDULE 10S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 117.3mm
Flange thickness (C): 15.7mm
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DN20 (3/4 NB) SCHEDULE 10S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 117.3mm
Flange thickness (C): 15.7mm
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£ 76.76 per item 76.76 GBP
DN20 (3/4 NB) SCHEDULE 40S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 117.3mm
Flange thickness (C): 15.7mm
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DN20 (3/4 NB) SCHEDULE 40S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 117.3mm
Flange thickness (C): 15.7mm
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£ 77.92 per item 77.92 GBP
DN20 (3/4 NB) SCHEDULE 80S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 117.3mm
Flange thickness (C): 15.7mm
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DN20 (3/4 NB) SCHEDULE 80S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 117.3mm
Flange thickness (C): 15.7mm
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DN20 (3/4" NB) SCHEDULE 10S ASA150 WELD NECK FLANGE SS 304
Outside diameter (O): 98.5mm
Flange thickness (C): 12.7mm
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£ 33.36 per item 33.36 GBP
DN20 (3/4" NB) SCHEDULE 10S ASA150 WELD NECK FLANGE SS 316
Outside diameter (O): 98.5mm
Flange thickness (C): 12.7mm
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£ 30.56 per item 30.56 GBP
DN20 (3/4" NB) SCHEDULE 40S ASA150 WELD NECK FLANGE SS 304
Outside diameter (O): 98.5mm
Flange thickness (C): 12.7mm
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£ 34.32 per item 34.32 GBP
DN20 (3/4" NB) SCHEDULE 40S ASA150 WELD NECK FLANGE SS 316
Outside diameter (O): 98.5mm
Flange thickness (C): 12.7mm
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£ 31.48 per item 31.48 GBP
DN20 (3/4" NB) SCHEDULE 80S ASA150 WELD NECK FLANGE SS 304
Outside diameter (O): 98.5mm
Flange thickness (C): 12.7mm
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DN20 (3/4" NB) SCHEDULE 80S ASA150 WELD NECK FLANGE SS 316
Outside diameter (O): 98.5mm
Flange thickness (C): 12.7mm
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DN200 (8 NB) SCHEDULE 80S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 381.0mm
Flange thickness (C): 41.1mm
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DN200 (8" NB) SCHEDULE 10S ASA150 WELD NECK FLANGE SS 304
Outside diameter (O): 342.9mm
Flange thickness (C): 28.6mm
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£ 481.32 per item 481.32 GBP
DN200 (8" NB) SCHEDULE 10S ASA150 WELD NECK FLANGE SS 316
Outside diameter (O): 342.9mm
Flange thickness (C): 28.6mm
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£ 765.80 per item 765.8 GBP
DN200 (8" NB) SCHEDULE 10S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 381.0mm
Flange thickness (C): 41.1mm
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DN200 (8" NB) SCHEDULE 10S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 381.0mm
Flange thickness (C): 41.1mm
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DN200 (8" NB) SCHEDULE 40S ASA150 WELD NECK FLANGE SS 304
Outside diameter (O): 342.9mm
Flange thickness (C): 28.6mm
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£ 714.72 per item 714.72 GBP
DN200 (8" NB) SCHEDULE 40S ASA150 WELD NECK FLANGE SS 316
Outside diameter (O): 342.9mm
Flange thickness (C): 28.6mm
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£ 630.32 per item 630.32 GBP
DN200 (8" NB) SCHEDULE 40S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 381.0mm
Flange thickness (C): 41.1mm
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Contact us for pricing 0.0 GBP
DN200 (8" NB) SCHEDULE 40S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 381.0mm
Flange thickness (C): 41.1mm
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Contact us for pricing 0.0 GBP
DN200 (8" NB) SCHEDULE 80S ASA150 WELD NECK FLANGE SS 304
Outside diameter (O): 342.9mm
Flange thickness (C): 28.6mm
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DN200 (8" NB) SCHEDULE 80S ASA150 WELD NECK FLANGE SS 316
Outside diameter (O): 342.9mm
Flange thickness (C): 28.6mm
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Contact us for pricing 0.0 GBP
DN200 (8" NB) SCHEDULE 80S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 381.0mm
Flange thickness (C): 41.1mm
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DN25 (1 NB) SCHEDULE 10S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 123.9mm
Flange thickness (C): 17.5mm
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DN25 (1 NB) SCHEDULE 10S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 123.9mm
Flange thickness (C): 17.5mm
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£ 88.24 per item 88.24 GBP
DN25 (1 NB) SCHEDULE 40S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 123.9mm
Flange thickness (C): 17.5mm
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DN25 (1 NB) SCHEDULE 40S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 123.9mm
Flange thickness (C): 17.5mm
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£ 64.72 per item 64.72 GBP
DN25 (1 NB) SCHEDULE 80S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 123.9mm
Flange thickness (C): 17.5mm
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DN25 (1 NB) SCHEDULE 80S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 123.9mm
Flange thickness (C): 17.5mm
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DN25 (1" NB) SCHEDULE 10S ASA150 WELD NECK FLANGE SS 304
Outside diameter (O): 107.9mm
Flange thickness (C): 14.2mm
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£ 25.32 per item 25.32 GBP
DN25 (1" NB) SCHEDULE 10S ASA150 WELD NECK FLANGE SS 316
Outside diameter (O): 107.9mm
Flange thickness (C): 14.2mm
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£ 41.32 per item 41.32 GBP
DN25 (1" NB) SCHEDULE 40S ASA150 WELD NECK FLANGE SS 304
Outside diameter (O): 107.9mm
Flange thickness (C): 14.2mm
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£ 28.44 per item 28.44 GBP
DN25 (1" NB) SCHEDULE 40S ASA150 WELD NECK FLANGE SS 316
Outside diameter (O): 107.9mm
Flange thickness (C): 14.2mm
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£ 41.04 per item 41.04 GBP
DN25 (1" NB) SCHEDULE 80S ASA150 WELD NECK FLANGE SS 304
Outside diameter (O): 107.9mm
Flange thickness (C): 14.2mm
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DN25 (1" NB) SCHEDULE 80S ASA150 WELD NECK FLANGE SS 316
Outside diameter (O): 107.9mm
Flange thickness (C): 14.2mm
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DN250 (10 NB) SCHEDULE 80S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 444.5mm
Flange thickness (C): 47.7mm
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DN250 (10" NB) SCHEDULE 10S ASA150 WELD NECK FLANGE SS 304
Outside diameter (O): 406.4mm
Flange thickness (C): 30.2mm
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£ 1,240.72 per item 1240.72 GBP
DN250 (10" NB) SCHEDULE 10S ASA150 WELD NECK FLANGE SS 316
Outside diameter (O): 406.4mm
Flange thickness (C): 30.2mm
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£ 838.84 per item 838.84 GBP
DN250 (10" NB) SCHEDULE 10S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 444.5mm
Flange thickness (C): 47.7mm
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DN250 (10" NB) SCHEDULE 10S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 444.5mm
Flange thickness (C): 47.7mm
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DN250 (10" NB) SCHEDULE 40S ASA150 WELD NECK FLANGE SS 304
Outside diameter (O): 406.4mm
Flange thickness (C): 30.2mm
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DN250 (10" NB) SCHEDULE 40S ASA150 WELD NECK FLANGE SS 316
Outside diameter (O): 406.4mm
Flange thickness (C): 30.2mm
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£ 940.72 per item 940.72 GBP
DN250 (10" NB) SCHEDULE 40S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 444.5mm
Flange thickness (C): 47.7mm
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DN250 (10" NB) SCHEDULE 40S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 444.5mm
Flange thickness (C): 47.7mm
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DN250 (10" NB) SCHEDULE 80S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 444.5mm
Flange thickness (C): 47.7mm
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DN300 (12 NB) SCHEDULE 80S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 520.7mm
Flange thickness (C): 50.8mm
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DN300 (12" NB) SCHEDULE 10S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 520.7mm
Flange thickness (C): 50.8mm
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DN300 (12" NB) SCHEDULE 10S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 520.7mm
Flange thickness (C): 50.8mm
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DN300 (12" NB) SCHEDULE 40S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 520.7mm
Flange thickness (C): 50.8mm
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DN300 (12" NB) SCHEDULE 80S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 520.7mm
Flange thickness (C): 50.8mm
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DN300 (12" NB) SCHEDULE 80S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 520.7mm
Flange thickness (C): 50.8mm
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DN32 (1"1/4 NB) SCHEDULE 10S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 133.3mm
Flange thickness (C): 19.0mm
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DN32 (1"1/4 NB) SCHEDULE 10S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 133.3mm
Flange thickness (C): 19.0mm
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£ 111.68 per item 111.68 GBP
DN32 (1"1/4 NB) SCHEDULE 40S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 133.3mm
Flange thickness (C): 19.0mm
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DN32 (1"1/4 NB) SCHEDULE 40S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 133.3mm
Flange thickness (C): 19.0mm
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£ 88.00 per item 88.0 GBP