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Socket Weld Flanges
For essential pipe-to-pipe connectivity in a wide range of industries, Socket Weld Flanges from Fortis Forge are recognized for their high strength, precise alignment capabilities, and superior resistance to pressure, corrosion, and mechanical fatigue. These flanges are precision-engineered to meet performance and durability standards as per ASTM A105, ASME B16.5, and applicable DIN specifications. Manufactured using carbon steel or mild steel, our socket weld flanges offer excellent mechanical properties and are ideal for high-pressure, small-diameter piping systems where leak-proof connections are critical.
With advanced machining, controlled forging, and strict quality checks, Fortis Forge Socket Weld Flanges deliver exceptional sealing integrity and structural stability in demanding industrial environments. These flanges are designed with a socket in which the pipe is inserted before being fillet welded around the outer edge, ensuring a solid and clean connection. This design helps reduce turbulence and eliminates the need for beveling the pipe, making them ideal for applications requiring smooth flow and precise fitting.
Available in a variety of sizes, pressure ratings, and facing types (such as RF and FF), our Socket Weld Flanges provide reliable, space-saving, and cost-effective solutions for fluid and gas handling across industries such as oil & gas, chemical processing, power generation, petrochemicals, and water treatment.
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- Size
½” to 24” (DN15–DN600)
- Standard
ASME B16.5 / BS 4504 / EN 1092-1
- Material
Carbon Steel (ASTM A105) / Mild Steel (IS 2062)
- Enquiry
What is a Socket Weld Flange?
A Socket Weld Flange is a forged flange designed for small-diameter, high-pressure piping systems. It features a recessed socket into which the pipe is inserted and then fillet welded around the hub. This ensures a smooth bore and excellent flow characteristics with minimal turbulence.
Socket Weld Flanges are ideal for pipelines where internal cleanliness and strength are crucial, especially in systems with high pressure, vibration, or thermal cycling.
Material Grades We Use
At Fortis Forge, our Socket Weld Flanges are manufactured using:
Carbon Steel (ASTM A105)
→ Excellent strength and mechanical properties. Suitable for high-pressure and high-temperature systems, including oil & gas, power, and petrochemical sectors.
Mild Steel (IS 2062)
→ Offers good weldability, ductility, and cost-effectiveness. Perfect for structural and low-pressure piping in general industries.
Each flange is precision-machined to ensure:
Tight tolerance for pipe fit
Smooth bore alignment for flow efficiency
Uniform wall thickness and surface finish
High resistance to pressure, temperature, and vibration
Manufacturing Standards at Fortis Forge
Every Socket Weld Flange is subjected to rigorous quality control procedures:
Precision CNC machining and facing
Heat treatment for enhanced durability
Non-destructive testing (NDT)
Dimensional and pressure compliance testing
Full material traceability and test certifications (MTCs)
All flanges conform to global standards such as ASME B16.5, BS 4504, and EN 1092-1.
Applications Across Industries
Fortis Forge Socket Weld Flanges are widely used in:
Oil & Gas Transmission
Thermal & Nuclear Power Stations
Petrochemical Refineries
Marine and Offshore Installations
Fertilizer and Chemical Plants
Firefighting and HVAC Systems
Their design minimizes leakage and improves mechanical strength, making them suitable for high-integrity and mission-critical piping systems.
Why Choose Fortis Forge?
Certified raw materials with MTCs
Advanced in-house testing and inspection
Consistent forging, machining, and finishing
Commitment to quality, delivery, and compliance
Global export expertise with full documentation support
Socket Weld Flanges – Class 150/300/600, Carbon Steel Socket Weld Flange Fittings, Mild Steel SWRF Flanges, ASTM A105 Socket Weld Flanges, ASME B16.5 Flanges, High Pressure CS/MS SWRF Flanges, Raised Face & Flat Face Socket Weld Flanges Manufacturer in India
As a leading manufacturer of Socket Weld Flanges, Fortis Forge is dedicated to producing high-quality pipe flanges that conform to stringent international standards. Our manufacturing process involves precision machining, socket preparation, and thorough inspection to ensure each flange delivers superior sealing performance, dimensional accuracy, and long-term durability. In India’s highly competitive market for flanges, our commitment to quality, consistency, and customer satisfaction clearly distinguishes us.
When selecting Socket Weld Flanges for your piping systems, it is essential to consider the size, pressure class (150#, 300#, etc.), material grade, and service requirements. Our socket weld flanges are designed with a recessed socket into which the pipe is inserted, then fillet welded around the outer edge. This design ensures strong, leak-proof connections in high-pressure, small-diameter piping systems. These flanges are widely used in oil & gas, petrochemicals, power plants, refineries, water treatment, and process piping systems.
Available in carbon steel and mild steel (ASTM A105, IS 2062) and compliant with ASME B16.5 and DIN standards, our socket weld flanges offer excellent mechanical strength, corrosion resistance, and weldability. Whether you’re working in high-pressure conditions or precision-sensitive environments, Fortis Forge supplies dependable socket weld flanges tailored to your specific operational needs.
Socket Weld Flanges, Carbon Steel Socket Weld Flange Fittings, Mild Steel Socket Weld Flanges, ASME B16.5 Socket Weld Flanges, Class 150 & Class 300 Socket Weld Flanges, Socket Weld Flange Manufacturers in India
- SocketWeld Flanges Specification
| Specifications | ASME B16.5 / BS 4504 / EN 1092-1 |
| Size Range | ½” to 24” (DN15 to DN600) |
| Types | Socket Weld Flange, Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ) |
| Pressure Class | Class 150, 300, 600, 900, 1500 |
| Material Grades | Carbon Steel (ASTM A105), Mild Steel (IS 2062) |
| Standard | ASTM, ASME, ANSI, DIN, EN, JIS, BS |
| Applications | Oil & Gas, Refinery, Power Generation, Petrochemical, Shipbuilding, Water Treatment |
- SocketWeld Flanges Dimensions
Class 150 Socket Weld Flanges
| NPS (in / mm) | Outer Diameter (mm) | Flange Thickness (mm) | Socket Depth (mm) | Bolt Circle Dia (mm) | No. of Bolts |
|---|---|---|---|---|---|
| 1/2 (15) | 90 | 9.6 | 10 (approx) | 60.3 | 4 |
| 3/4 (20) | 100 | 11.2 | 11 | 69.9 | 4 |
| 1 (25) | 110 | 12.7 | 13 | 79.4 | 4 |
| 1¼ (32) | 115 | 14.3 | 14 | 88.9 | 4 |
| 1½ (40) | 125 | 15.9 | 16 | 98.4 | 4 |
| 2 (50) | 150 | 17.5 | 17 | 120.7 | 4 |
| 2½ (65) | 180 | 20.7 | 19 | 139.7 | 4 |
| 3 (80) | 190 | 22.3 | 21 | 152.4 | 4 |
Class 300 Socket Weld Flanges
| NPS (in / mm) | Outer Diameter (mm) | Flange Thickness (mm) | Socket Depth (mm) | Bolt Circle Dia (mm) | No. of Bolts |
|---|---|---|---|---|---|
| 1/2 | 95 (≈95.2) | 14 | — | 66.7 | 4 |
| 3/4 | 117.3 | 15.7 | — | 84.0 | 4 |
| 2 | 165.1 | 22.3 | — | 127.0 | 8 |
Class 600 Socket Weld Flanges
| NPS (in / mm) | Outer Diameter (mm) | Flange Thickness (mm) | Socket Depth (mm) | Bolt Circle Dia (mm) | No. of Bolts |
|---|---|---|---|---|---|
| 1/2 (15) | 95 | 14 | — | 66.55 | 4 |
| 3/4 (20) | 117.3 | 15.7 | — | 91.9 | 8 |
| 2½ (65) | 190.5 | 28.4 | 41 | 149.3 | 8 |
Class 1500 Socket Weld Flanges
| NPS (in) | Flange Diameter (in) | No. of Bolts | Bolt Size (in) | Bolt Circle Dia (in) |
|---|---|---|---|---|
| 1/2 | 4‑3/4 | 4 | 3/4 | 3‑1/4 |
| 3/4 | 5‑1/8 | 4 | 3/4 | 3‑1/2 |
| 1 | 5‑7/8 | 4 | 7/8 | 4 |
The Socket Weld Flange price can vary depending on size, pressure class (150#, 300#, etc.), face type (RF, FF, RTJ), material grade, and order quantity. Typically, the price for carbon steel or mild steel socket weld flanges ranges from ₹60 to ₹1,050 per piece, depending on dimensions and standards. As a trusted socket weld flange supplier in India, Fortis Forge offers competitive pricing while maintaining a strong focus on precision engineering and product integrity.
Quality Assurance
To preserve the high standards of our selection of Forged Fittings, Buttweld Fittings, Flanges and we have always adhered to a systematic quality management process.
Team of Experts
Our staff of experts is vibrant and talented, and they have always been our largest supporters and contributors to our success.
- Equivalent Grades of Socketweld Flanges
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
| ASTM A105 (Socket Weld Flange) | 1.0432 | K03504 | SF 440A | 1501-151-430A | 20 | NF A 36-205 | P250GH / S235JR |
If you would like to inquire or place an order.
+91 83330 05894
Forged Fittings, Buttweld Fittings and Flanges Manufacturer in India
- Manufactured from high-strength carbon steel grades
- Available in forged, buttweld, and flange configurations
- Precision-machined for leak-proof, high-pressure applications
- Heat-treated and normalized to ensure durability and strength
- Tested for dimensional accuracy and pressure resistance
- Corrosion-resistant coatings available on request
- Application Industries
