Technical Details Summary
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Manufacturing Process: Open-die and closed-die drop forging followed by precision CNC machining, heat treatment (Normalizing/Quenching), and serrated face finishing.
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Dimensional Range: Nominal pipe sizes from 15 NB up to 600 NB (1/2" to 24") and custom heavy-ring sizes up to 60" NB.
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Pressure Ratings & Tables: Pressure Classes 150 LBS, 300 LBS, 400 LBS, 600 LBS, 900 LBS, 1500 LBS, and 2500 LBS; Table 2.5 through Table 400.
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Core Material Specifications: ASTM/ASME A105, ASTM/ASME A350 LF2, LF3, and ASTM A694 F42, F46, F50, F52, F56, F60, F65, F70.
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Quality & Verification: EN 10204 3.1 Mill Test Certification, Ultrasonic Testing (UT), Magnetic Particle Inspection (MPI), Hydrostatic Test Clearance, and Flange Face Roughness Audits.
Carbon Steel Flanges Specifications
Detailed dimensional parameters, manufacturing methods, and standard supply capabilities offered by Trident Metal & Alloys.
| Specification Parameter | Manufacturing Capabilities & Supply Limits |
|---|---|
| Size & Pressure Class | 15 NB to 600 NB (1/2" to 24") in Class 150#, 300#, 400#, 600#, 900#, 1500#, 2500#; EN/DIN PN6 to PN400 |
| BS 10 Flange Tables | Table 2.5, Table 6, Table 10, Table 16, Table 25, Table 40, Table 64, Table 160, Table 320, Table 400 |
| Flange Form Variations | Weld Neck, Slip On, Socket Weld, Blind, Lapped/Lap Joint, Screwed/Threaded, Reducing, Spectacle, Slip On Boss, Plate, Plate Blank, Screwed Boss |
| Standard High-Temp Material | ASTM / ASME A105 / A105N (Normalized Carbon Steel Forgings) |
| Low-Temperature Material | ASTM / ASME A350 Gr. LF2 (Class 1 & 2), A350 Gr. LF3 (Charpy impact tested down to -46°C / -101°C) |
| High-Yield Linepipe Material | ASTM A694 Gr. F42, F46, F48, F50, F52, F56, F60, F65, F70 |
| Flange Facing Types | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Male & Female (M&F), Tongue & Groove (T&G) |
| Dimensional Standards | ASME B16.5, ASME B16.47 Series A & B, BS 4504, EN 1092-1, DIN 2527 / 2633, MSS-SP-44 |
| Gasket Face Finish | Stock Finish (125-250 µin Ra), Smooth Finish (63-125 µin Ra), Concentric Serrated, Spiral Serrated |
| Surface Treatments | Black Anti-Rust Paint, Yellow Varnish, Transparent Oil, Hot-Dip Galvanizing, Zinc Electroplating |
Carbon Steel Flanges Overview
Trident Metal & Alloys is a premier Carbon Steel Flanges Manufacturer in India. We forge high-precision flanges engineered to withstand severe bolt loads, extreme thermal expansion, and mechanical piping stress across heavy-duty industrial processing lines.
Engineered to integrate seamlessly with our Carbon Steel Pipe Fittings, our forged flanges establish leak-proof, pressure-tight flanged joints across steam generation, oil and gas transmission, and petrochemical networks. Every flange undergoes drop forging and precision machining to prevent gasket blowouts and structural deflection.
As a trusted Carbon Steel Flanges Supplier in India, we maintain an extensive inventory of Weld Neck, Slip On, Blind, and Socket Weld flanges in pressure ratings up to 2500 LBS. Dispatched with EN 10204 3.1 Mill Test Certificates (MTCs), our products strictly comply with ASME, DIN, and BS standards.
Carbon Steel Flanges Grades & Standards
| Alloy Grades | Series / Category | Primary Characteristics & Industrial Applications |
|---|---|---|
| ASTM A105 / A105N | Standard Forged Carbon | Strong, dependable high-pressure standard; ideal for refinery steam, oil, and gas lines. |
| ASTM A350 Gr. LF2 | Low-Temp (-46°C) | Sub-zero tough; built to prevent freezing cracks in cold gas transport and refrigeration plants. |
| ASTM A350 Gr. LF3 | Extreme Cryogenic (-101°C) | Deep-freeze specialist; stays crack-resistant under extreme cryogenic liquid gas processing. |
| ASTM A694 Gr. F42 / F46 | High-Yield Pipeline | Fine-grained strength; handles heavy flow and pressure in overland oil and water pipelines. |
| ASTM A694 Gr. F50 / F52 | Medium-High Yield | Heavy-duty forged alloy; built for offshore platforms and high-stress marine risers. |
| ASTM A694 Gr. F56 / F60 | High-Strength Pipeline | High-stress defender; engineered to prevent leaks in high-pressure gas gathering manifolds. |
| ASTM A694 Gr. F65 / F70 | Ultra-High Yield Forged | Maximum strength in compact size; built for space-restricted, heavy-wall pipelines. |
Key Advantages of Carbon Steel Flanges
Handles High Pressure & Vibration
Heavy drop-forged construction withstands high bolt tightening, intense pipe vibrations, and sudden pressure surges without cracking or bending.
100% Leak-Proof Seal
Precision-machined serrated and RTJ faces lock gaskets tight, preventing hazardous liquid or gas leaks across your pipeline.
Sub-Zero Crack Protection
Low-temperature grades stay tough in freezing conditions, preventing dangerous brittle cracks in cold weather or refrigeration systems.
Easy Installation & Maintenance
Available in slip-on, weld neck, and blind options, making it simple to connect pipes, inspect lines, or shut off flow for quick servicing.
Long Service Life Under Heat
Heat-treated structure prevents internal metal fatigue and warp, giving you reliable performance through repeated heating and cooling cycles.
Quality Verification & Testing Standards
Every shipment dispatched by Trident Metal & Alloys undergoes strict multi-stage quality control to comply with project material standards:
Mill Test Certification
Fully compliant EN 10204 3.1 certification verifying heat chemistry, mechanical yield/tensile strength, hardness, and heat treatment cycles.
Flange Face & Dimensional Inspection
Precise CNC audits measuring bolt-circle diameter, flange thickness, hub taper, and surface roughness (Ra) compliance.
Non-Destructive Testing (NDT)
100% Ultrasonic Testing (UT) on raw forged billets, Magnetic Particle Inspection (MPI) on sealing faces, and Hydrostatic testing support.
Third-Party Inspection (TPI)
Independent inspection protocols managed through client-approved agencies like TUV, Bureau Veritas, SGS, DNV, and Lloyd's Register.
Regional Supply Network Across India
Western Region (Maharashtra & Gujarat)
Supplying ASTM A105 and A694 F52 high-yield flanges to shipyards, refineries, chemical complexes, and EPC contractors in Mumbai, Pune, Thane, Ahmedabad, Vadodara, Rajkot, Surat, and Hazira.
Northern & Central Region (NCR, Punjab, UP & MP)
Distributing A350 LF2 low-temperature and class 300# slip-on flanges for gas distribution, power stations, and process plants across Delhi NCR, Gurgaon, Faridabad, Ghaziabad, Ludhiana, Kanpur, Indore, and Bhopal.
Southern Region (Tamil Nadu, Karnataka, Telangana & AP)
Delivering high-pressure weld neck and blind flanges to thermal power units, hydraulic machinery builders, and offshore projects in Chennai, Coimbatore, Bengaluru, Hyderabad, Visakhapatnam, and Kochi.
Eastern Region (West Bengal, Odisha, Jharkhand & Chhattisgarh)
Bulk supply of heavy-wall A694 F65 high-yield and BS 10 table flanges for steel plant utilities, mining slurry lines, and heavy infrastructure in Kolkata, Durgapur, Jamshedpur, Rourkela, Bhilai, and Raipur.
Frequently Asked Questions
Q: What is the difference between ASTM A105 and ASTM A350 LF2 flanges?
A: ASTM A105 is designed for standard high-temperature service, whereas ASTM A350 LF2 is specifically impact-tested at -46°C for low-temperature applications.
Q: When should a Weld Neck Flange be used over a Slip On Flange?
A: Weld Neck flanges feature a tapered hub that reduces stress concentration at the base, making them ideal for high-pressure, sub-zero, or cyclic fatigue conditions, whereas Slip On flanges are preferred for lower-pressure applications.
Q: What is the pressure rating range available for carbon steel flanges?
A: We stock and manufacture carbon steel flanges in ASME Classes 150, 300, 400, 600, 900, 1500, and 2500 LBS, as well as BS 10 tables and EN/DIN PN ratings.
Q: What face finishes are available for carbon steel flanges?
A: We offer Stock Finish (125-250 µin Ra) for standard soft gaskets, Smooth Finish (63-125 µin Ra) for metallic gaskets, and Ring Type Joint (RTJ) grooves for high-pressure applications.
Q: Are ASTM A694 high-yield flanges suitable for cross-country pipelines?
A: Yes, ASTM A694 grades (F42 through F70) are high-yield forgings specifically engineered to match high-strength API 5L line pipes in oil and gas transmission.
Q: Do you supply blind flanges for pipeline shutdown and testing?
A: Yes, we supply complete lines of solid forged blind and spectacle blind flanges in all pressure classes for pressure testing and pipeline isolation.
Q: What documentation accompanies carbon steel flange orders?
A: All shipments include comprehensive EN 10204 3.1 Mill Test Certificates containing full ladle chemistry, mechanical test values, heat treatment reports, and NDT clearance.
Request a Quote
Contact Trident Metal & Alloys for direct factory pricing, immediate stock availability, and technical material selection support for your carbon steel flange requirements.
- Email Inquiries: tridentmetal96@yahoo.com
- Direct Phone / WhatsApp: +91 9619282829 / +91 9619966304
