Faizan Flanges is a trusted manufacturer and supplier of ANSI B16.5 Class 400 Flanges in Doha, Qatar, delivering reliable solutions for medium to high-pressure piping systems. Manufactured in accordance with ASME/ANSI B16.5 standards, Class 400 flanges are designed to offer a strong balance between pressure-handling capability and durability. At Faizan Flanges, these flanges are produced using high-quality raw materials and precision machining to ensure accurate dimensions and secure, leak-free connections. ANSI B16.5 Class 400 flanges are widely used in demanding industrial environments where strength, safety, and consistent performance are essential.
ANSI B16.5 Class 400 Flanges are manufactured from materials such as carbon steel, stainless steel, alloy steel, and duplex steel, depending on service requirements. Their mechanical properties vary with material grade but generally include high tensile strength, reliable yield strength, and strong resistance to internal pressure and mechanical stress. Designed to operate at higher pressures than Class 300, these flanges maintain structural integrity and sealing performance under elevated temperature and pressure conditions.
Faizan Flanges, a leading supplier in Doha, Qatar, offers an extensive selection of ANSI B16.5 Class 400 Flanges, including weld neck flanges, slip-on flanges, blind flanges, threaded flanges, and lap joint flanges. Designed for diverse industrial applications, our high-quality inventory and commitment to exceptional service make us a trusted choice for flange products in the region.
| 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 400 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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| CLASS | Nominal Pipe Size | Slip On | Threaded | Socket Weld | Lap Joint | Blind | Weld Neck |
| 400 lb | ½ | 1 | 1 | 2 | 1 | 2 | 2 |
| ¾ | 2 | 2 | 2 | 2 | 2 | 2 | |
| 1 | 2 | 2 | 2 | 2 | 2 | 3 | |
| 1¼ | 3 | 3 | 3 | 3 | 3 | 3 | |
| 1½ | 3 | 3 | 3 | 3 | 4 | 4 | |
| 2 | 5 | 5 | 5 | 5 | 5 | 6 | |
| 2½ | 8 | 8 | 8 | 8 | 7 | 10 | |
| 3 | 9 | 9 | 9 | 9 | 9 | 11.5 | |
| 3½ | 11 | 12 | 11 | 11 | 13 | 12 | |
| 4 | 13 | 13 | 13 | 13 | 17 | 16.5 | |
| 5 | 15 | 15 | 15 | 15 | 20 | 21 | |
| 6 | 19 | 19 | 19 | 19 | 27 | 26 | |
| 8 | 30 | 30 | 30 | 30 | 47 | 42 | |
| 10 | 43 | 43 | 43 | 43 | 70 | 54 | |
| 12 | 64 | 64 | 64 | 64 | 123 | 88 | |
| 14 | 90 | 90 | 90 | 105 | 140 | 114 | |
| 16 | 106 | 98 | 98 | 140 | 180 | 140 | |
| 18 | 130 | 130 | 130 | 160 | 220 | 165 | |
| 20 | 165 | 165 | 165 | 195 | 285 | 197 | |
| 22 | 185 | 185 | 185 | 245 | 355 | 225 | |
| 24 | 220 | 220 | 220 | 275 | 430 | 268 |
ANSI B16.5 Class 400 Flanges are commonly used in oil and gas processing, petrochemical plants, refineries, power generation facilities, and chemical industries. They are ideal for connecting pipes, valves, pumps, and equipment in systems handling higher pressure fluids, steam, oil, and gas. These flanges are suitable for both onshore and offshore applications where reliable performance is critical. Faizan Flanges supplies ANSI B16.5 Class 400 flanges to ensure safe, durable, and efficient connections that meet international standards and support long-term industrial operations.
Yes, we offer custom sizes for ANSI B16.5 Class 400 Flanges to meet specific project needs. Our team at Faizan Flanges is committed to providing tailored solutions for all your requirements. For more details, contact us at sales@faizanflanges.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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