Rishabh Industries is a dependable manufacturer and supplier of high quality weld neck flanges for oil and gas, petrochemical, power, pharma, marine and process industries.
Our forged weld neck flanges deliver reliable performance in high-pressure, high-temperature, and critical-service piping systems where joint integrity is essential.
A weld neck flange features a long, tapered hub that we butt-weld to the pipe, ensuring smooth stress distribution and creating a strong, leak-resistant connection.
Technical Specifications:
- Size: 1/2″ (15 NB) to 48″ (1200NB)
- Standards: ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
- Pressure Ratings: Class 150, Class 300, Class 400, Class 600, Class 900, Class1500, Class 2500 | PN6, PN10, PN16, PN25, PN40, PN64 etc.
- Carbon Steel Weld Neck Flanges: ASTM A105/A105N, A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, A694 F42, F46, F48, F50, F52, F56, F60, F65, F70, A516.60, 65, 70 (Spectacle Blind Flange, Spacer Ring/Spade Flange), Steel RST37.2, C22.8
- Stainless Steel Weld Neck Flanges: ASTM A182 F202, F304/304L/304H, F316/316L, F316H, F316TI, F310, F321, F904L
- Alloy Steel Weld Neck Flanges: ASTM A182 F1, F5, F9, F11, F22, F91
- Special Alloy Weld Neck Flanges: Duplex, Super Duplex, Nickel Alloys Flange Face Type: Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
- Coating/Surface Treatment: Anti-rust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized Value Added Services: CNC Machining, Customised Flanges
Benefits of Weld Neck Flanges
- Superior stress distribution through the tapered hub, reducing fatigue at the joint.
- Excellent leak resistance in high-pressure and high-temperature service.
- Ideal for cyclic loads, vibration, and fluctuating temperatures.
- Smooth internal flow, since the bore matches the pipe and minimises turbulence.
- Long service life with lower maintenance and replacement costs.
- Easy radiographic inspection of the butt-weld joint.
Industries We Serve
- Oil & Gas (upstream, midstream, downstream)
- Petrochemical and Refineries
- Power Generation and Boilers
- Chemical and Fertilizer Plants
- Pharmaceutical and Food Processing
- Shipbuilding and Marine
- Water Treatment and Infrastructure
Frequently Asked Questions (FAQs)
1. What is a weld neck flange used for?
It joins pipes, valves and equipment in high-pressure, high-temperature or critical piping systems such as refineries, power plants and chemical units.
2. Which standards do your weld neck flanges follow?
They are manufactured to ASME B16.5, ASME B16.47, EN 1092-1, DIN and other international standards, as per your requirement.
3. Which materials are available?
Carbon steel, stainless steel, alloy steel, duplex, super duplex and nickel alloys, with Mill Test Certificates on request.
4. How is a weld neck flange different from a slip-on flange?
A weld neck flange has a tapered hub and is butt-welded, giving higher strength and fatigue resistance. A slip-on flange is simpler and lower in cost, but suited to lower-pressure service.
5. Can you manufacture custom sizes and specifications?
Yes. We produce flanges as per your drawing, size, pressure class, schedule and material grade.
6. Do you supply for export and bulk orders?
Yes. We handle domestic and international orders with export-grade packing, complete documentation and timely dispatch.
Get precision-forged weld neck flanges built for demanding pipelines. Request your Rishabh Industries quote today!
Website: www.rishabhind.in
Email Id: info@rishabhind.in
Phone No: 99305 32430
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