Hudson Flanges is a trusted maker and supplier of high-performing industrial flanges like Weldo Flanges and Nipo Flanges. The company, having a strong focus on quality, precision and reliability, delivers innovative flange solutions to a variety of industries such as oil and gas, petrochemical, and power generation. Weldo and Nipo flanges are expertly designed for joining pipes in high-pressure applications with safe and leak-free connections. Hudson Flanges combines technical expertise with cutting-edge production to international standards, providing clients with durable, custom-made products for demanding operating conditions.
Weldo Flanges and Nipo Flanges tend to be fabricated from high-quality materials such as carbon steel, stainless steel, alloy steel and duplex steel, which are specially formulated to meet specific industrial needs. These flanges have superior mechanical properties including high tensile strength (450–750 MPa) good yield strength (250–450 MPa) and improved resistance to heat pressure and corrosion. Their structure allows for direct welding onto pipes forming a strong, leak-free connection. The hardness and toughness of the flanges make them suitable for demanding applications with high stress vibration and thermal fluctuation ensuring consistent performance in mission-critical pipeline systems.
| Size | 1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000 |
|---|---|
| Standards | ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092 |
| Pressure Rating ANSI | Class 150, Class 300, Class 400, Class 600, Class 900, Class1500, Class 2500 |
| Pressure Calculation in DIN | 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 |
| UNI | 6Bar 10Bar 16Bar 25Bar 40Bar |
| EN | 6Bar 10Bar 16Bar 25Bar 40Bar |
| Coating | Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized |
| Test Certificates | EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc |
| Production Technique | Forged, Heat treated and machined |
| Connect Type/ Flange Face Type | Raised Face (RF), Ring Type Joint (RTJ), Weldo Face (FF) |
| Special design | As per your drawing AS, ANSI, BS, DIN and JIS |
| Test | Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector |
| Equipment | Press machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc |
| Material | Alloy 20 Weldo Flange, Brass Nipo Flange, Copper Nickel Weldo Flange, Stainless Steel Weldo Flange, AISI 4130 Weldo Flange, Inconel Weldo Flange, Titanium Weldo Flange, Monel Weldo Flange, Super Duplex Nipo Flange, Duplex Steel Nipo Flange, Incoloy Nipo Flange, Hastelloy Weldo Flange, SMO 254 Weldo Flange, Nickel Alloy Nipo Flange. |
| Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE MR0175 | |
Hudson Flanges, a leading supplier in Midland, UK, offers an extensive selection of Weldo Flange / Nipo Flange, 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.
Weldo Flanges and Nipo Flanges are extensively utilized in applications that involve compact, strength-high, and leak-tight piping system connections. They particularly fit in high-temperature and high-pressure uses of oil and gas, petrochemical, power generation, and chemical processing facilities. Weldo flanges, because of their tapered hub arrangement, are welded on the pipe directly, offering smooth flow and minimal turbulence. Nipo flanges combine a welding neck flange with a forged nipple, ideal for removing small diameter pipes from larger pipes. Their small size, strength, and simplicity of installation make them well worth it in high-performance and space-constrained piping systems.
| NPS | A | B | C | D |
| 1/2 | 3/4 19.05 | 1.3/8 34.93 | 15/16 23.81 | 5/8 15.88 |
| 3/4 | 7/8 22.23 | 1.5/8 41.28 | 1.3/16 30.16 | 13/16 20.64 |
| 1 | 1.1/16 26.99 | 2 50.80 | 1.7/16 36.51 | 1.1/32 26.19 |
| 1.1/4 | 1.1/4 31.75 | 2.3/8 60.3 | 1.3/4 44.45 | 1.3/8 34.93 |
| 1.1/2 | 1.5/16 33.34 | 2.7/8 73 | 2 50.80 | 1.5/8 41.28 |
| 2 | 1.1/2 38.10 | 3.1/2 88.90 | 2.9/16 65.09 | 2.1/16 52.39 |
| 2.1/2 | 1.5/8 41.28 | 4.1/16 103.19 | 3 76.20 | 2.7/16 61.91 |
| 3 | 1.3/4 44.45 | 4.13/16 122.24 | 3.11/16 93.66 | 3.1/16 77.79 |
| 3.1/2 | 2 50.80 | 5.3/8 136.53 | 3.7/8 98.43 | 3.9/16 90.49 |
| 4 | 2 50.80 | 6 152.40 | 4.3/4 120.65 | 4 101.60 |
| 5 | 2.1/4 57.15 | 7.1/8 180.98 | 5.9/16 141.29 | 5.1/16 128.59 |
| 6 | 2.3/8 60.3 | 8.1/2 215.90 | 6.11/16 169.86 | 6.1/16 153.99 |
| 8 | 2.3/4 69.85 | 10.3/8 263.53 | 8.11/16 220.66 | 7.15/16 201.61 |
| 10 | 3.1/16 77.79 | 12.9/16 319.09 | 10.13/16 274.64 | 10 254.00 |
| 12 | 3.3/8 85.73 | 14.7/8 377.83 | 12.13/16 325.44 | 12 304.80 |
| 14 | 3.1/2 88.90 | 16.1/8 409.58 | 14.1/16 357.19 | 13.1/4 336.55 |
| 16 | 3.11/16 93.66 | 18.1/4 463.55 | 16.1/16 407.99 | 15.1/4 387.35 |
| 18 | 4.1/16 103.19 | 20.3/4 527.05 | 18.5/8 473.08 | 17.1/4 438.15 |
| 20 | 4.5/8 117.48 | 23.1/16 585.79 | 20.1/16 509.59 | 19.1/4 488.95 |
| 24 | 5.3/8 136.53 | 27.7/8 708.03 | 25.1/8 638.18 | 23.1/4 590.55 |
| NPS | A | B | C | D |
| RATING | NOMINAL PIPE SIZE FROM 3/4″ TO 36″ | |||||
| Bore schedule | B | C | D | E | Weight [kg] | |
| STD | 15,8 | 18,5 | 0,9 | |||
| 150# | XS | 13,8 | 17,6 | 88,9 | 11,2 | 0,9 |
| 160 | 11,7 | 11,7 | 0,9 | |||
| XXS | 6,4 | 6,4 | 0,9 | |||
| Bore schedule | B | C | D | E | Weight [kg] | |
| STD | 15,8 | 18,5 | 1,2 | |||
| 300# | XS | 13,8 | 17,6 | 95,3 | 14,3 | 1,2 |
| 160 | 11,7 | 11,7 | 1,2 | |||
| XXS | 6,4 | 6,4 | 1,2 | |||
| Bore schedule | B | C | D | E | Weight [kg] | |
| STD | 15,8 | 18,5 | 1,3 | |||
| 600# | XS | 13,8 | 17,6 | 95,3 | 14,3 | 1,3 |
| 160 | 11,7 | 11,7 | 1,3 | |||
| XXS | 6,4 | 6,4 | 1,3 | |||
| Bore schedule | B | C | D | E | Weight [kg] | |
| STD | 15,8 | 18,5 | 2,4 | |||
| 900# | XS | 13,8 | 17,6 | 120,6 | 22,4 | 2,4 |
| 160 | 11,7 | 11,7 | 2,4 | |||
| XXS | 6,4 | 6,4 | 2,4 | |||
| Bore schedule | B | C | D | E | Weight [kg] | |
| STD | 15,8 | 18,5 | 2,4 | |||
| 1500# | XS | 13,8 | 17,6 | 120,6 | 22,4 | 2,4 |
| 160 | 11,7 | 11,7 | 2,4 | |||
| XXS | 6,4 | 6,4 | 2,4 | |||
| Bore schedule | B | C | D | E | Weight [kg] | |
| STD | 15,8 | 18,5 | 3,6 | |||
| 2500# | XS | 13,8 | 17,6 | 133,4 | 30,2 | 3,6 |
| 160 | 11,7 | 11,7 | 3,6 | |||
| XXS | 6,4 | 6,4 | 3,6 | |||
Yes, we offer custom sizes for Weldo Flange / Nipo Flange to meet specific project needs. Our team at Hudson Flanges is committed to providing tailored solutions for all your requirements. For more details, contact us at sales@hudsonflanges.co.uk.
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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