WELDO
FLANGES
Overview
Weldo Flanges— Manufacturers & Suppliers in India
Manibhadra Metals is a trusted manufacturer, supplier, stockist, and exporter of ANSI/ASME B16.5 Weldo Flanges in India. We supply Stainless Steel, Carbon Steel, Alloy Steel, Duplex, Super Duplex, Inconel, Monel, Hastelloy, Nickel Alloy, and other special-alloy Weldoflanges for reinforced branch connections in high-pressure and critical piping systems.
A Weldo Flange is a one-piece forged fitting that combines the functions of a Weld Neck Flange and a Weldolet. Unlike separately welded components, the flange and outlet are manufactured as a single integral unit, providing improved strength, accurate alignment, reduced stress concentration, and dependable leak-resistant performance.
Our Weldoflanges are available in ASME B16.5, ASME B16.47 Series A and Series B, EN 1092-1, EN 1092-2, DIN, MSS SP-44, AWWA C207, and BS 4504 standards. Common pressure ratings include Class 150, 300, 400, 600, 900, 1500, and 2500, along with PN-rated options such as PN10, PN16, PN25, and PN40.
Manibhadra Metals manufactures Raised Face, Flat Face, RTJ, reducing, forged, and customized Weldoflanges in standard and special dimensions. These products are widely used in oil and gas pipelines, refineries, petrochemical plants, boilers, pressure vessels, offshore systems, chemical processing units, power plants, and other demanding industrial applications.
All Weldoflanges can be supplied with dimensional inspection, PMI testing, ultrasonic testing, radiography, hydrostatic testing, EN 10204 3.1 or 3.2 Material Test Certificates, NACE compliance, and third-party inspection documentation according to project requirements.
| Quick Specification Reference | |
|---|---|
| Size Range | ½″ (15 NB) to 48″ (1200 NB) • DN10–DN5000 |
| Standards | ASME B16.5, ASME B16.47 Series A & B, ASME B16.48, EN 1092, DIN, BS, JIS, MSS SP-44, API 605, AWWA C207, GOST & UNI |
| Pressure Ratings | ANSI Class 150, 300, 600, 900, 1500 & 2500 • DIN PN6–PN64 • JIS 5K–63K • EN/UNI 6–40 Bar |
| Face Types | Raised Face, Flat Face, RTJ, Male-Female, Lap Joint Face and Tongue & Groove |
| Available Types | Forged, Threaded, Screwed, Plate, Equal and Reducing Weldoflanges |
| Manufacturing | Forged, Heat Treated and Machined as per Standard or Customer Drawings |
| Surface Finish | Black Paint, Anti-rust Paint, Zinc Plated, Yellow Passivation, Cold and Hot-Dip Galvanized |
| Testing | Hydrostatic, X-ray, Ultrasonic, Magnetic Particle, Spectrographic and Dimensional Inspection |
| Certificates | EN 10204 3.1 / 3.2 MTC, Raw Material Certificate, Radiography Report, NACE MR0103, NACE MR0175 and Third-Party Inspection |
| Applications | Refineries, Petrochemical Plants, Nuclear Power, Heavy Oil Processing, Pressure Vessels and Industrial Piping |
| Export Markets | USA, Canada, UAE, Saudi Arabia, Singapore, Europe, Brazil, Oman, Egypt and Worldwide |
Overview
How Weldo Flanges Work
1
Saddle Base Conforms to Run Pipe
2
Single Weld to Run Pipe
3
Integral Self-Reinforcement
4
Flanged Branch for Easy Maintenance
PRICE TABLE
Weldo Flange Reference Price Chart
The prices listed above are indicative and subject to change based on quantity, material grade, and market conditions. For an accurate quotation on Weldo Flanges, please contact our sales team directly.
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| SR NO | QTY | Description | Price Per Piece (USD) |
|---|---|---|---|
| 1 | 50 | Flange 2" RF Weldoflange CS A/SA105 | $5.42 |
| 2 | 20 | Flange 2" 300 RF Weldoflange CS A/SA105 | $8.56 |
| 3 | 20 | Flange 3" 300 RF Weldoflange CS A/SA105 | $15.11 |
| 4 | 100 | Flange 4" 150 RF Weldoflange CS A/SA105 | $15.20 |
| 5 | 40 | Flange 4" 600 RF Weldoflange CS A/SA105 | $40.60 |
| 6 | 50 | Flange 6" 300 RF Weldo Flange CS A/SA105 | $33.10 |
| 7 | 240 | Flange 16" 150 RF Weldoflange CS A/SA105 | $80.80 |
| 8 | 30 | Flange 3" 300 RF Weldo Flange CS A/SA105 | $23.00 |
| 9 | 120 | Flange 4" 150 RF Weldo Flange CS A/SA105 | $15.00 |
| 10 | 50 | Flange 6" 150 RF Weldoflange CS A/SA105 | $25.12 |
| 10 | 60 | Flange 6" 300 RF Weldoflange CS A/SA105 | $40.90 |
| 12 | 36 | Flange 8" 300 RF Weldoflange CS A/SA105 | $50.20 |
| 13 | 20 | Flange 4" 300 RF Nipo Flange CS A/SA105 | $30.55 |
| Note: Prices are approximate and may vary depending on size, pressure class, material grade, quantity, testing requirements, certification, and market conditions. Contact Manibhadra Metals for the latest quotation. | |||
SPECIFICATION TABLE
Weldo Flange Specifications Chart
Explore the complete specifications of Stainless Steel Weldoflanges manufactured by Manibhadra Metals, including size range, pressure ratings, international standards, face types, surface coatings, manufacturing process, testing, certifications, and available configurations. Our Weldoflanges are produced in accordance with ASME, ANSI, DIN, EN, BS, JIS, API, MSS, AWWA, GOST, and other global standards to ensure strong, leak-resistant branch connections in high-pressure and high-temperature piping systems.
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| Weldo Flange Specification Reference | |
|---|---|
| Weldo Flange Pressure Calculation in DIN | 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 Weldo Flange |
| JIS ANSI B16.5 Weldoflange | 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K Weldo Flange |
| UNI ASME B16.47 Weldoflange | 6Bar 10Bar 16Bar 25Bar 40Bar Weldo Flange |
| ASME B16.5 Weldo Flange Size Chart | 1/2" (15 NB) to 48" (1200NB) DN10~DN5000 |
| Standard MSS-SP-44 Weldoflange | ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Weldo Flange, ASME Weldo Flange, BS Weldo Flange, DIN Weldo Flange, EN Weldo Flange, 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 |
| Weldo Flange Pressure Rating ANSI | Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS Weldo Flange |
| EN ANSI B16.5 Weldoflange Dimensions | 6Bar 10Bar 16Bar 25Bar 40Bar Weldo Flange |
| Coating For SS Weldoflange | Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized Weldo Flange |
| Most Common Types of Weldo Flange | Forged / Threaded / Screwed / Plate |
| Connect Type / Flange Face Type | Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, 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 |
| Test | Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector |
| 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 |
| Equipment | Press machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc |
| Origin | Indian / West Europe / Japan / USA / Korean |
| Weldo Flange Uses & Application |
Bitumen upgraders. Heavy oil refineries. Nuclear power (mostly seamless). Petrochemicals and acids. |
| Manufacturer of ANSI B16.5 Class 150 Weldoflange |
ANSI DIN, GOST, JIS, UNI, BS, AS2129, AWWA, EN, SABS, NFE etc. Weldo Flange: -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 |
| B.S | BS4504, BS3293, BS1560, BS10 |
| AS 2129 | Table D; Table E; Table H |
| ANSI, ASME, MSS, API & AWWA Standards | ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings |
| ANSI Standards | ANSI B16.5, ANSI B16.47(API605), MSS SP44, ANSI B16.36, ANSI B16.48 |
| Additional ANSI Standards | ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48 |
| American Standard | American standard (ANSI) |
| German Standard | German (DIN) |
| British Standard | British standard (BS) |
| DIN Standards | DIN: DIN 2527, DIN 2566, DIN 2573, DIN 2576, DIN 2641, DIN 2642, DIN 2655, DIN 2656, DIN 2627, DIN 2628, DIN 2629, DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2636, DIN 2637, DIN 2638 Weldo Flange |
| Other Standards | AWWA C207; EN1092-1, GOST12820, JIS B2220; KS B1503, SABS1123; NFE29203; UNI2276 |
| Export to ANSI 150 Weldo Flange Dimensions | Ireland, Singapore, Indonesia, Ukraine, Saudi Arabia, Spain, Canada, USA, Brazil, Thailand, Korea, Iran, India, Egypt, Oman, Dubai, Peru, etc |
| Material Test Certificates | Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE MR0175 |
Materials
Weldo Flange Material Grades
Explore the complete range of Weldo Flanges manufactured by Manibhadra Metals in Carbon Steel, Stainless Steel, Alloy Steel, Duplex, Super Duplex, Titanium, Copper, Copper Nickel, Inconel, Hastelloy, Monel, Nickel, Aluminium, Incoloy, 254 SMO, and other special alloys. Our Weldo Flanges are supplied in accordance with ASTM, ASME, ANSI, DIN, EN, ISO, BS, and JIS standards for high-pressure and critical branch connection applications.
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| Material | Standards & Grades |
|---|---|
| Copper Weldo Flange | T1, T2, C10100, C10200, C10300, C10400, C10500, C10700, C10800, C10910, C10920, TP1, TP2, C10930, C11000, C11300, C11400, C11500, C11600, C12000, C12200, C12300, TU1, TU2, C12500, C14200, C14420, C14500, C14510, C14520, C14530, C17200, C19200, C21000, C23000, C26000, C27000, C27400, C28000, C33000, C33200, C37000, C44300, C44400, C44500, C60800, C63020, C68700, C70400, C70600, C70620, C71000, C71500, C71520, C71640, etc. |
| Copper Nickel Weldo Flange | ASTM / ASME SB 61 / 62 / 151 / 152, Copper Nickel 90/10 (C70600), Cupro Nickel 70/30 (C71500), UNS C71640 |
| Brass Weldo Flange | 3602 / 2604 / H59 / H62 / etc. |
| Carbon Steel Weldo Flange | ASTM/ASME A/SA105, A/SA105N & A/SA216-WCB, DIN 1.0402, DIN 1.0460, DIN 1.0619, Die Steel, ASTM A105 / ASME SA105, A105N, ASTM A350 LF2 / ASME SA350, High Yield Carbon Steel ASTM A694 / A694 F52, F56, F60, F65, F70, F80 |
| Stainless Steel Weldoflange | ASTM/ASME A/SA182 F304, F304L, F316, F316L, ASTM/ASME A/SA351 CF8, CF3, CF8M, CF3M, DIN 1.4301, DIN 1.4306, DIN 1.4401, DIN 1.4404, DIN 1.4308, DIN 1.4408, DIN 1.4306, DIN 1.4409 |
| Alloy Steel Weldo Flange | ASTM A182 / ASME SA182 F5, F9, F11, F12, F22, F91 |
| Titanium Weldo Flange |
ASTM B381 / ASME SB381, Titanium Gr. 1, Titanium Gr. 2, Titanium Gr. 4, Titanium Gr. 5, Titanium Gr. 7 ASTM R50250/GR.1 | R50400/GR.2 | R50550/GR.3 | R50700/GR.4 | GR.6 | R52400/GR.7 | R53400/GR.12 | R56320/GR.9 | R56400/GR.5 |
| Inconel Weldoflange | ASTM B564 / ASME SB564, Inconel 600, 601, 625, 718, 783, 690, X750 Flanges |
| Alloy 20 Weldo Flange | ASTM B462 / ASME SB462, Carpenter® 20 Alloy, Alloy 20Cb-3 |
| Aluminium Weldo Flange | 5052 / 6061 / 6063 / 2017 / 7075 / etc. |
| Nickel Weldo Flange | ASTM B564 / ASME SB564, Nickel 200, Nickel 201, Nickel 205, Nickel 205LC |
| Hastelloy Weldo Flange | ASTM B564 / ASME SB564, Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3, X Flanges |
| Monel Weldoflange | ASTM B564 / ASME SB564, Monel 400 (UNS N04400), Monel 500 (UNS N05500) |
| Duplex Weldo Flange | S31803 / S32205, ASTM A182 Grades F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61 |
| Super Duplex Weldo Flange | S32750 / S32760, ASTM A182 Grades F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61 |
| Nimonic Weldo Flange | Nimonic 75, Nimonic 80A, Nimonic 90 |
| Incoloy Weldo Flange | ASTM B564 / ASME SB564, Incoloy 800, 800H, 800HT (UNS N08800), 825 (UNS N08825), 925 Flanges |
| 254 SMO Weldo Flange | ASTM A182 / ASME SA182, SMO 254/6Mo, UNS S31254, DIN 1.4547 |
| Other Weldo Flange Material | Tin Bronze, Aluminium Bronze, Lead Bronze |
PRODUCT VARIANTS AND SPECIFICATIONS
Weldo Flange Material Types & Configurations
Explore our complete range of Weldo Flanges manufactured to ASME B16.5, ASME B16.47 Series A and B, ANSI, EN 1092, AWWA C207, and MSS SP-44 standards. Available in reducing, flat face, raised face, Class 150, Class 300, PN16, forged, large-diameter, and custom configurations for reliable branch connections in high-pressure and industrial piping systems.
ASME B16.5 Weldo Flange
ASME B16.5 Weldo Flange manufactured as a one-piece forged branch connection for high-pressure piping systems. Designed for strong, compact, and leak-resistant installation and available with EN 10204 3.1 Material Test Certificate.
ASME B16.5 reducing weldo Flange
ASME B16.5 Reducing Weldo Flange designed to connect a smaller branch line to a larger main pipe. Manufactured as an integral forged component for smooth flow transition and dependable pressure performance.
ANSI B16.5 flat face weldo Flange
ANSI B16.5 Flat Face Weldo Flange with full-face gasket contact for suitable low-to-medium pressure piping systems. Manufactured for secure branch connections and supplied in standard and custom material grades.
ASME B16.47 Series a Weldo Flange
ASME B16.47 Series A Weldo Flange manufactured for large-diameter and heavy-duty pipelines. Designed with robust flange dimensions, secure bolting, and reliable gasket sealing for critical service.
ASME B16.47 Series b Weldo Flange
ASME B16.47 Series B Weldo Flange offers a compact and lighter design for large-bore piping applications. Suitable where reduced flange weight and installation space are important.
ANSI 150 Weldo Flange Dimensions
ANSI Class 150 Weldo Flange manufactured for low-to-moderate pressure branch connections. Commonly used in water, utility, chemical, and general industrial piping systems.
ASME B16.5 Class 300 Weldoflange
ASME B16.5 Class 300 Weldoflange with Raised Face design for improved gasket compression and sealing. Suitable for oil, gas, petrochemical, refinery, and process piping applications.
Weldo Flange EN 1092-1 Type 02
EN 1092-1 Type 02 Weldo Flange manufactured for European-standard piping systems. Designed for dependable branch connections with accurate dimensions and controlled gasket sealing.
EN 1092-2 PN16 Weldoflange
EN 1092-2 PN16 Weldoflange manufactured for nominal pressure service up to 16 bar. Suitable for waterworks, utilities, chemical processing, and industrial piping systems.
Forged Weldoflange
Forged Weldoflange manufactured as a single-piece branch connection for superior strength and alignment. Available in standard and custom sizes, pressure classes, face types, and material grades.
AWWA C207 Class d Weldoflange
AWWA C207 Class D Weldoflange designed for water transmission and large-diameter utility pipelines. Manufactured for dependable branch connections in low-pressure water service.
Standard MSS-SP-44 Weldoflange
MSS SP-44 Weldoflange manufactured for large-diameter steel pipeline systems. Available in standard and custom bore, drilling, pressure, and material configurations with inspection and certification support.
Materials
Weldo Flange Dimensions
Explore the complete Weldolet Dimensions Chart from NPS 1/2″ to 24″, including A, B, C, and D measurements in inches and millimetres.
General Notes
Dimensions: The top value is in inches, and the bottom value is in millimetres.
Root Gap – X: The outlet is raised above the run pipe using spacers, such as welding rods, to create a proper and uniform weld gap between the run pipe curvature and the fitting base.
Length – L: Centre line of run pipe + X (root gap) + A (height of Weldolet).
Bevelled Ends: Manufactured in accordance with ASME B16.9 and ASME B16.25.
Source: Dimensional data is based on Bonney Forge references, except for the millimetre conversions.
Trademark Note: Weldolet® is a registered name. “Welding Outlet” is another commonly used term.
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| 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 60.30 |
1 3/4 44.45 |
1 3/8 34.93 |
| 1 1/2 | 1 5/16 33.34 |
2 7/8 73.00 |
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 60.30 |
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 |
TYPES
Explore Other Types Of Flanges
Discover a complete range of flange designs engineered for different pressure classes, piping systems, and industrial applications.
KNOWLEDGE BASE
Frequently Asked Questions
What is a Weldo Flange?
A Weldo Flange is a one-piece forged branch connection that combines a Weld Neck Flange with a Weldolet-style outlet. Manibhadra Metals supplies Weldo Flanges designed for strong, compact, and leak-resistant connections in industrial piping systems.
Which standards and pressure ratings are available?
Manibhadra Metals supplies Weldo Flanges manufactured to ASME B16.5, ASME B16.47 Series A and B, EN 1092, MSS SP-44, AWWA C207, DIN, BS, and JIS standards. Available pressure ratings include Classes 150, 300, 400, 600, 900, 1500, and 2500, along with PN-rated configurations.
Which materials are available for Weldo Flanges?
Weldo Flanges are available in Carbon Steel, Stainless Steel, Alloy Steel, Duplex, Super Duplex, Inconel, Hastelloy, Monel, Incoloy, Titanium, Copper Nickel, Nickel, Aluminium, and other special alloys.
What testing and certificates are available?
Manibhadra Metals can supply Weldo Flanges with EN 10204 3.1 or 3.2 Material Test Certificates, PMI, ultrasonic testing, radiography, hydrostatic testing, magnetic-particle inspection, NACE certification, and third-party inspection reports.
Can Manibhadra Metals manufacture custom Weldo Flanges?
Manibhadra Metals can supply Weldo Flanges with EN 10204 3.1 or 3.2 Material Test Certificates, PMI, ultrasonic testing, radiography, hydrostatic testing, magnetic-particle inspection, NACE certification, and third-party inspection reports.
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