From the heart of Hamilton’s industrial landscape, Neesham Flanges has built a reputation for reliability and precision, particularly when it comes to high-pressure applications. Our American National Standards Institute (ANSI) B16.5 Class 900 Flanges are manufactured with meticulous attention to detail, ensuring they perform flawlessly in the most demanding systems. We understand that in critical environments, there is no room for compromise, which is why we supply flanges that you can trust to maintain integrity under extreme pressure, backed by our commitment to New Zealand’s industrial backbone.
To withstand the rigorous demands of a Class 900 rating, these flanges are crafted from robust materials like ASTM A105 carbon steel or ASTM A182 grades of stainless steel. Their composition is specifically chosen for exceptional strength and resilience. The resulting mechanical properties are impressive, offering high tensile strength and excellent yield points that prevent deformation. This ensures a secure, leak-proof connection capable of handling pressures up to 900 pounds per square inch, even at elevated temperatures, providing a dependable seal for your high-stakes piping infrastructure.
| Size Range | 1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000 |
|---|---|
| Standards | B16.47 Series A & B, ANSI/ASME B16.5, BS4504, B16.48, EN-1092, BS 10, DIN, ANSI Flanges, BS Flanges, ASME Flanges, EN Flanges, DIN Flanges, GOST Flanges. |
| DIN | 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 |
| JIS | 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K |
| UNI | 6Bar 10Bar 16Bar 25Bar 40Bar |
| EN | 6Bar 10Bar 16Bar 25Bar 40Bar |
| Main Types | Threaded / Forged / Plate /Screwed |
| Flange supporting material | Ring Joint, Gasket, Flange Bolts |
| Test Certificates | EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc |
| Most Common Types |
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| Production technique |
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| Connect Type/ Flange Face Type | Ring Type Joint (RTJ), Raised Face (RF),Large Male-Female (LMF), Flat Face (FF),Small Male-Female (SMF), Lap-Joint Face (LJF), Large Tongue & Groove, Small Tongue, Groove |
| Special design | As per your drawing AS, ANSI, BS, DIN and JIS 15 NB (1/2″) to 200 NB (8″) Equal and Reducing Configurations Class 900 Threaded Flange, Socketweld Flange, Slip-On Flange, Blind Flange, Weld Neck Flange |
| Test | Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector |
| Equipment | Bending machine, Press machine, electric bevelling machine, Pushing Machine, Sand-blasting machine etc |
| Origin | Indian / West Europe / Japan / USA / Korean |
| Specialized Manufacturer of |
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| Standard | ANSI DIN, GOST, JIS, UNI, BS, AS2129, AWWA, EN, SABS, NFE etc.
BS Flange, EN Flange, API 6A Flange, ANSI Flange, ASME Flange, DIN Flange, EN1092-1 Flange, UNI Flange, JIS/ KS Flange, BS4504 Flange, GB Flange, AWWA C207 Flange, GOST Flange, PSI Flange
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| Normal pipe size | Outside dia. of flange | Minimum thickness of flange | Overall Length | Bolt Circle | No. and Size of Holes | O.D. of raised face | |||
| Welding neck | Slip-on & socket welding | Lap Joint | |||||||
| O | Q | Y | Diam. | No. | dia. | R | |||
| 1/2 | 95 | 14.3 | 52.4 | 22.2 | 22.2 | 66.5 | 4 | 15 | 35 |
| 3/4 | 117 | 15.9 | 57.2 | 25.4 | 25.4 | 82.5 | 4 | 19 | 43 |
| 1 | 124 | 17.5 | 61.9 | 27.0 | 27.0 | 89.0 | 4 | 19 | 51 |
| 1-1/4 | 133 | 20.7 | 66.7 | 28.6 | 28.6 | 98.5 | 4 | 19 | 64 |
| 1-1/2 | 156 | 22.3 | 69.8 | 31.8 | 31.8 | 114.5 | 4 | 22 | 73 |
| 2 | 165 | 25.4 | 73.0 | 36.5 | 36.5 | 127.0 | 8 | 19 | 92 |
| 2-1/2 | 190 | 28.6 | 79.4 | 41.3 | 41.3 | 149.0 | 8 | 22 | 105 |
| 3 | 210 | 31.8 | 82.6 | 46.0 | 46.0 | 168.0 | 8 | 22 | 127 |
| 3-1/2 | 229 | 35.0 | 85.7 | 49.2 | 49.2 | 184.0 | 8 | 25 | 140 |
| 4 | 273 | 38.1 | 101.6 | 54.0 | 54.0 | 216.0 | 8 | 25 | 157 |
| 5 | 330 | 44.5 | 114.3 | 60.3 | 60.3 | 266.5 | 8 | 29 | 186 |
| 6 | 356 | 47.7 | 117.5 | 66.7 | 66.7 | 292.0 | 12 | 29 | 216 |
| 8 | 419 | 55.6 | 133.4 | 76.2 | 76.2 | 349.0 | 12 | 32 | 270 |
| 10 | 508 | 63.5 | 152.4 | 85.7 | 115.1 | 432.0 | 16 | 85 | 324 |
| 12 | 559 | 66.7 | 155.6 | 92.1 | 111.1 | 489.0 | 20 | 35 | 381 |
| 14 | 603 | 69.9 | 165.1 | 93.7 | 117.5 | 527.0 | 20 | 38 | 413 |
| 16 | 686 | 76.2 | 177.8 | 106.4 | 127.0 | 603.0 | 20 | 41 | 470 |
| 18 | 743 | 82.6 | 184.2 | 117.6 | 139.7 | 654.0 | 20 | 45 | 533 |
| 20 | 813 | 88.9 | 190.5 | 127.0 | 165.1 | 724.0 | 24 | 45 | 584 |
| 24 | 940 | 101.6 | 203.2 | 139.7 | 184.2 | 838.0 | 24 | 51 | 692 |
ANSI B16.5 Class 900 flanges are applied to high-pressure piping systems in industries like the oil and gas, petrochemical, power generation, and marine engineering sectors. The flanges can support pressures of up to 2220 psi at 100°F and are thus suitable for harsh environments. Common uses include joining valves, pumps, and equipment in steam, gas, and corrosive liquid pipelines. Their robust design allows for leak-free connections and system integrity upon exposure to extreme pressure and temperature conditions. Subject to various types such as weld neck, blind, and slip-on, they ensure reliability, safety, and accessibility when servicing critical infrastructures and business undertakings.
Yes, we offer custom sizes for ANSI B16.5 Class 900 Flanges to meet specific project needs. Our team at Neesham Flanges is committed to providing tailored solutions for all your requirements. For more details, contact us at sales@neeshamflanges.com.
We are renowned for delivering products with precise, accurate dimensions. Each product undergoes thorough testing, both destructive and non-destructive, to ensure quality before being shipped to our customers.
Our team is ready to assist you. Contact us for any queries or personalized solutions.
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