Weld Neck Flange
Weld Neck Flanges
Precision-engineered Weld Neck Flanges designed for high-integrity pipe connections, pressure systems and demanding industrial applications where reliable performance and secure welding are essential.
- Weld Neck Flanges
- Welding Neck Flanges
- ANSI
- ASME
- DIN
- BS
- EN
- RF
- RTJ
- 150–2500 LBS
Weld Neck Flanges Manufacturer & Supplier
Sawariya Metal Industries is a manufacturer, supplier, stockist and exporter of Weld Neck Flanges for industrial piping, pressure vessels, process equipment and high-integrity piping systems.
Weld Neck Flanges feature a long tapered hub that provides a gradual transition from the flange to the pipe. They are welded directly to the pipe and are commonly selected for applications involving pressure, temperature, cyclic loading and demanding process conditions.
We supply Weld Neck Flanges in a wide range of sizes, pressure classes, face configurations and materials for industries including oil & gas, petrochemical, chemical processing, power generation, marine, sugar, nuclear, defence and industrial fabrication.
Key Features of Weld Neck Flanges
High-Integrity Connection
Long tapered hub provides a robust transition between pipe and flange.
Pressure Applications
Suitable for demanding piping and pressure-system requirements.
Multiple Face Types
Available in Raised Face, Flat Face and Ring Type Joint configurations.
Wide Material Selection
Stainless steel, duplex, alloy steel, carbon steel and nickel alloys.
Weld Neck Flanges Specifications
Dimensions
ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges and custom dimensions.
Standards
ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA and custom drawings.
Pressure Class
150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS and 2500 LBS.
DIN Rating
DIN ND-6, ND-10, ND-16, ND-25, ND-40 and others.
Size
1/8" NB to 48" NB.
Flange Face Type
Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ).
Manufacturing
Forged / Machined / Finished according to applicable specifications.
Customization
Available according to approved customer drawings and project requirements.
DIN, ANSI & BS Standards
| Standard | Applicable 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 | DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2636, DIN 2637, DIN 2638, DIN 2673 |
| ANSI | ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48 |
| BS | BS 4504, BS 1560, BS 10 |
Weld Neck Flange Face Types
Raised Face (RF)
Common industrial sealing configuration for pressure piping and process applications.
Flat Face (FF)
Flat sealing surface configuration for compatible piping and equipment connections.
Ring Type Joint (RTJ)
Precision-machined sealing groove for demanding pressure and process applications.
Weld Neck Flanges Material & Grades
Stainless Steel
ASTM A182 / A240 F304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H and 904L.
Duplex & Super Duplex Steel
ASTM / ASME A/SA 182 F44, F45, F51, F53, F55, F60 and F61.
Alloy Steel
ASTM / ASME A/SA 182 & A387 F1, F5, F9, F11, F12, F22 and F91.
Carbon Steel
ASTM / ASME A/SA 105, A350, A181 LF2, A516 Gr.70, A36 and A694 grades.
Nickel Alloys
Nickel 200, Nickel 201, Monel 400, Monel 500, Inconel 600, 601, 625, 800, 825, Hastelloy C276 and Alloy 20.
Copper Alloys
Cu-Ni 90/10, Cu-Ni 70/30 and selected UNS copper alloy grades.
Available Materials
| Material Category | Grades / Specifications |
|---|---|
| Stainless Steel | ASTM A182 / A240 F304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L |
| Duplex & Super Duplex | F44, F45, F51, F53, F55, F60, F61 |
| Alloy Steel | F1, F5, F9, F11, F12, F22, F91 |
| Carbon Steel | A105, A350, A181 LF2, A516 Gr.70, A36, A694 F42, F46, F52, F60, F65, F70 |
| Nickel Alloys | Nickel 200, Nickel 201, Monel 400, Monel 500, Inconel 600, 601, 625, 800, 825, Hastelloy C276, Alloy 20 |
| Copper Alloys | Cu-Ni 90/10, Cu-Ni 70/30 and selected UNS copper grades |
Weld Neck Flanges Dimensions — ASME B16.5
ANSI / ASME / ASA B16.5 — 150 LB RF
Welding Neck Flange
| Nominal Size | D | b | g | m | a | J* | h | k | Holes | l | Kg |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2" | 88.9 | 11.1 | 34.9 | 30.2 | 21.3 | 15.7 | 47.6 | 60.3 | 4 | 15.9 | 0.500 |
| 3/4" | 98.4 | 12.7 | 42.9 | 38.1 | 26.7 | 20.8 | 52.4 | 69.8 | 4 | 15.9 | 0.700 |
| 1" | 107.9 | 14.3 | 50.8 | 49.2 | 33.5 | 26.7 | 55.6 | 79.4 | 4 | 15.9 | 1.100 |
| 1 1/4" | 117.5 | 15.9 | 63.5 | 58.8 | 42.2 | 35.1 | 57.1 | 88.9 | 4 | 15.9 | 1.500 |
| 1 1/2" | 127.0 | 17.5 | 73.0 | 65.1 | 48.3 | 40.9 | 61.9 | 98.4 | 4 | 15.9 | 1.800 |
| 2" | 152.4 | 19.0 | 92.1 | 77.8 | 60.3 | 52.6 | 63.5 | 120.6 | 4 | 19.0 | 2.700 |
| 2 1/2" | 177.8 | 22.2 | 104.8 | 90.5 | 73.1 | 62.7 | 69.8 | 139.7 | 4 | 19.0 | 4.400 |
| 3" | 190.5 | 23.8 | 127.0 | 107.9 | 88.9 | 78.0 | 69.8 | 152.4 | 4 | 19.0 | 5.200 |
| 3 1/2" | 215.9 | 23.8 | 139.7 | 122.2 | 101.6 | 90.2 | 71.4 | 177.8 | 8 | 19.0 | 6.400 |
| 4" | 228.6 | 23.8 | 157.2 | 134.9 | 114.3 | 102.4 | 76.2 | 190.5 | 8 | 19.0 | 7.500 |
| 5" | 254.0 | 23.8 | 185.7 | 163.5 | 141.2 | 128.3 | 88.9 | 215.9 | 8 | 22.2 | 9.200 |
| 6" | 279.4 | 25.4 | 215.9 | 192.1 | 168.4 | 154.2 | 88.9 | 241.3 | 8 | 22.2 | 11.000 |
| 8" | 342.9 | 28.6 | 269.9 | 246.1 | 219.1 | 202.7 | 101.6 | 298.4 | 8 | 22.2 | 18.300 |
| 10" | 406.4 | 30.2 | 323.8 | 304.8 | 273.0 | 254.5 | 101.6 | 361.9 | 12 | 25.4 | 25.000 |
| 12" | 482.6 | 31.7 | 381.0 | 365.1 | 323.8 | 304.8 | 114.3 | 431.8 | 12 | 25.4 | 39.000 |
| 14" | 533.4 | 34.9 | 412.7 | 400.0 | 355.6 | 336.5 | 127.0 | 476.2 | 12 | 28.6 | 51.000 |
| 16" | 596.9 | 36.5 | 469.9 | 457.2 | 406.4 | 387.3 | 127.0 | 539.7 | 16 | 28.6 | 60.000 |
| 18" | 635.0 | 39.7 | 533.4 | 504.8 | 457.2 | 438.1 | 139.7 | 577.8 | 16 | 31.7 | 71.000 |
| 20" | 698.5 | 42.9 | 584.2 | 558.8 | 508.0 | 488.9 | 144.5 | 635.0 | 20 | 31.7 | 88.000 |
| 22" | 749.3 | 46.0 | 641.2 | 609.6 | 558.8 | 539.7 | 149.2 | 692.1 | 20 | 34.9 | 102.000 |
| 24" | 812.8 | 47.6 | 692.1 | 663.6 | 609.6 | 590.5 | 152.4 | 749.3 | 20 | 34.9 | 119.000 |
* Note:
The data “J” corresponds to the STD schedule as provided in the dimensional reference.
Applications of Weld Neck Flanges
- Oil & Gas
- Petrochemical Plants
- Chemical Processing
- Power Generation
- Marine Industry
- Sugar Industry
- Nuclear Industry
- Defence Industry
- Refineries
- Pressure Vessels
- Process Piping
- Industrial Fabrication
Quality & Inspection
Precision-Controlled Weld Neck Flanges
Weld Neck Flanges can be supplied with inspection and documentation according to applicable specifications, purchase orders and customer-specific requirements.
- Dimensional inspection
- Visual and surface inspection
- Material grade verification
- Chemical composition verification
- Mechanical testing as applicable
- Hardness testing as applicable
- Flange face and sealing-surface inspection
- Bolt-hole and drilling inspection
- Non-destructive testing as applicable
- Mill Test Certificate (MTC)
- Third-party inspection support
- Customer-specific documentation
Why Choose Our Weld Neck Flanges?
Wide Size Range
Available from 1/8" NB to 48" NB according to requirement.
Pressure Class Options
Available in multiple pressure classes for diverse industrial systems.
Multiple Materials
Stainless steel, carbon steel, alloy steel, duplex and nickel alloys.
Custom Engineering
Manufacturing options available according to approved drawings and project requirements.
Weld Neck Flanges Manufacturer in India
Weld Neck Flanges are high-integrity flange components designed for welded pipe connections in industrial piping and pressure systems. Their tapered hub provides a gradual transition between the pipe and flange and makes them suitable for demanding process applications.
Sawariya Metal Industries supplies Weld Neck Flanges, Welding Neck Flanges, ANSI Weld Neck Flanges, ASME Weld Neck Flanges, Stainless Steel Weld Neck Flanges, Carbon Steel Weld Neck Flanges and Duplex Weld Neck Flanges in multiple sizes, pressure classes, face types and materials.
Our Weld Neck Flanges are used across oil & gas, petrochemical, chemical, power generation, marine, nuclear, defence, refinery, pressure vessel and general engineering applications.
Related Flange Products
Blind Flanges
Solid flanges designed for pipe-end closure and pressure isolation.
Slip On Flanges
Practical flange configuration for a wide range of piping systems.
Socket Weld Flanges
Compact flange design for suitable high-pressure piping systems.
Threaded Flanges
Threaded flange solution for selected piping applications.
Lap Joint Flanges
Flange configuration suitable for convenient alignment and assembly.
Orifice Flanges
Flange assemblies used for flow measurement applications.
Technical Note:
Dimensional values, pressure ratings, drilling details, flange configurations, material grades and applicable standards should be verified against the latest governing ASME/ANSI/DIN/BS/EN specification, approved drawings, purchase order and Mill Test Certificate before final procurement or engineering use.