Stainless Steel 304 304L Flanges are essential components in piping systems, designed to create secure connections between pipes or equipment. Manufactured and exported by Ferro Fittings and Alloys in Mumbai, these flanges are crafted from high-grade stainless steel, ensuring durability and resistance to corrosion. Our commitment to quality and precision makes our flanges a preferred choice for various industrial applications around the world.
These flanges comply with rigorous standards such as ASTM, ASME, and DIN, covering a wide range of sizes from DN 15 to DN 600 (NPS ½ to NPS 24). They are available in pressure ratings from Class 150 to Class 2500 (PN10 to PN400), and can withstand temperatures ranging from -196°C to 800°C. Suitable end connections include weld neck, slip-on, threaded, and blind, ensuring versatility in installation.
The application of Stainless Steel 304 304L Flanges spans various industries, including Oil & Gas, Petrochemical, Chemical, Power Generation, and Pharmaceuticals. These flanges are particularly vital in projects across the UAE, Saudi Arabia, and Qatar, as well as in EPC and LSTK projects in the UK and USA. Their reliability and performance make them indispensable in shipbuilding and water treatment facilities, ensuring operational efficiency.
Ferro Fittings and Alloys is proud to be ISO 9001:2015 certified, providing EN 10204 3.1 / 3.2 Mill Test Certificates for our products. Our in-house testing capabilities include PMI, Hydrostatic, Hardness, and Impact (Charpy) tests, along with Ultrasonic Testing (UT) and Liquid Penetrant Testing (LPT). We also ensure compliance with NACE MR 0175 / ISO 15156 for applications in sour service environments. Request a free MTC sample or get a quick quote via WhatsApp.
Choosing Ferro Fittings means benefiting from competitive lead times of just 2–4 weeks, no minimum order quantity restrictions, and readily available stock. We offer FOB Mumbai, CIF, and CFR shipping with comprehensive export documentation to ensure smooth delivery. For inquiries, please contact us at +91-86550-39959, reach us on WhatsApp at wa.me/+918655039959, or email us at export@ferrofittings.com.
Trusted manufacturer & exporter of Flanges, Pipe Fittings and Valves in 30+ countries.
1–4 weeks depending on size, grade & quantity.
Urgent and bulk orders handled efficiently.FOB, CIF, CFR, EXW, DDP (Incoterms 2020).
Door-to-port and door-to-door delivery available.Sea Freight / Air Cargo / Express Courier.
Complete export documentation & tracking support.Trusted by EPC contractors, procurement teams, and global industrial buyers across multiple countries for certified supply and reliable delivery.
Direct supply with bulk stock availability to reduce your overall project cost.
ISO 9001, ISO 14001, ISO 45001, PED certified with full test certificates.
Safe, sea-worthy packaging ensuring damage-free international delivery.
Selecting the right partner for Stainless Steel 304 304L Flanges is critical for ensuring product quality, long-term performance, and successful project execution. As a trusted manufacturer and exporter, Ferro Fittings and Alloys delivers high-quality materials meeting international standards and global industry requirements.
Understand the key differences between local suppliers, trading companies, and professional manufacturers & exporters like Ferro Fittings and Alloys.
| Evaluation Factor | Small Local Suppliers | Trading Companies | Ferro Fittings and Alloys |
|---|---|---|---|
| Manufacturing Control | Limited or outsourced production | Dependent on third-party mills | Direct manufacturing with strict quality control |
| Standards Compliance | Basic or local standards | Varies depending on supplier | ASTM, ASME, ANSI, EN, ISO certified products |
| Inspection & Certification | Limited documentation | Inconsistent certification | MTC, TPI, and full export documentation provided |
| Export Capability | Mostly domestic supply | Moderate export handling | Global exports with complete logistics support |
| Delivery Reliability | Uncertain timelines | Depends on sourcing chain | Consistent lead times with ready stock availability |
| Project Risk Level | High | Medium | Low |
We manufacture and supply high-quality ASTM A182 F304 and F304L stainless steel flanges for piping, process equipment, pressure vessels, petrochemical plants, oil & gas facilities, chemical processing plants, food processing, pharmaceutical applications, water treatment systems and general industrial piping.
ASTM A182 F304 and F304L are forged austenitic stainless steel grades based on the widely used 18% chromium / 8% nickel stainless steel family. F304L is the low-carbon version of F304 and is particularly useful where welding and resistance to sensitization/intergranular corrosion are important considerations.
Our F304/F304L flanges can be supplied in various flange types, pressure classes, face configurations, sizes, bore schedules and international standards, subject to the applicable specification and customer requirements.
| Specification | SS 304 / SS 304L Flanges |
|---|---|
| Material | Austenitic Stainless Steel |
| Grades | SS 304, SS 304L |
| ASTM Material Grades | ASTM A182 F304, ASTM A182 F304L |
| ASME Material Grades | ASME SA182 F304, ASME SA182 F304L |
| UNS | S30400 / S30403 |
| EN Material Grades | EN 1.4301 / EN 1.4307 |
| EN Designations | X5CrNi18-10 / X2CrNi18-9 |
| JIS Grades | SUS304 / SUS304L |
| Flange Standards | ASME B16.5, ASME B16.47, EN 1092-1, JIS B2220 and other applicable national/international standards |
| Specialized Flange Standards | ASME B16.36 for Orifice Flanges; ASME B16.48 for Line Blanks |
| Size Range | NPS ½" to 24" (DN15–DN600) as per ASME B16.5; NPS 26" to 60" (DN650–DN1500) as per ASME B16.47 |
| Pressure Rating | ASME Class 150, 300, 400, 600, 900, 1500 and 2500, subject to applicable size limitations |
| PN Rating | PN ratings as per applicable EN/DIN standard, such as PN6, PN10, PN16, PN25, PN40, PN63, PN100, PN160, etc., where applicable |
| Flange Types | Weld Neck, Slip-On, Blind, Socket Weld, Threaded/Screwed, Lap Joint, Long Weld Neck, Orifice and Reducing Flanges |
| Specialty Products | Spectacle Blinds, Paddle Blinds, Paddle Spacers, Line Blanks, Nipo Flanges, Weldo Flanges and Custom Flanges, as applicable |
| Facing Types | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Male & Female, Tongue & Groove, as applicable |
| Bore / Pipe Schedule | Standard and custom bore sizes to suit specified pipe schedules |
| Manufacturing | Forged / Hot Forged and Machined, as applicable |
| Surface Finish | Machined flange face finish as specified by the applicable standard; special polished finishes available on request |
| Heat Treatment | Solution Heat Treatment as required by the applicable material specification |
| Testing & Inspection | Chemical Analysis, Mechanical Testing, Dimensional Inspection, Visual Inspection, PMI, Hardness and NDT as specified |
| NDT | PT, UT and other NDT examinations as required by purchase/project specification |
| Certification | EN 10204 3.1 / 3.2 MTC, Certificate of Conformance and Third-Party Inspection, as required |
| Applications | Oil & Gas, Chemical, Petrochemical, Pharmaceutical, Food Processing, Water Treatment, Power, Marine and General Process Industries |
| Chemical Element | ASTM A182 F304 | ASTM A182 F304L |
|---|---|---|
| Carbon (C) | 0.080% max. | 0.030% max. |
| Manganese (Mn) | 2.00% max. | 2.00% max. |
| Silicon (Si) | 1.00% max. | 1.00% max. |
| Phosphorus (P) | 0.045% max. | 0.045% max. |
| Sulfur (S) | 0.030% max. | 0.030% max. |
| Chromium (Cr) | 18.0–20.0% | 18.0–20.0% |
| Nickel (Ni) | 8.0–11.0% | 8.0–13.0% |
| Nitrogen (N) | 0.10% max. | 0.10% max. |
| Molybdenum (Mo) | Not specified | Not specified |
These limits are commonly tabulated for A182 F304/F304L; the applicable edition of ASTM A182/A182M and the material certificate should govern the actual supplied product.
The most important difference is carbon:
That lower carbon level is the key reason F304L is commonly preferred for welded fabrication, because it reduces the risk of chromium-carbide precipitation/sensitization in the heat-affected zone.
| Mechanical Property | F304 | F304L |
|---|---|---|
| Tensile Strength, min. | 515 MPa (75 ksi) | 485 MPa (70 ksi) |
| Yield Strength, min. | 205 MPa (30 ksi) | 170 MPa (25 ksi) |
| Elongation in 50 mm / 2 in. or 4D, min. | 30% | 30% |
| Reduction of Area, min. | 50% | 50% |
| Hardness | No specific maximum in the commonly cited A182 table | No specific maximum in the commonly cited A182 table |
| Country / Standard | SS304 Equivalent | SS304L Equivalent |
|---|---|---|
| Common / International | Stainless Steel 304 / SS304 | Stainless Steel 304L / SS304L |
| AISI | AISI 304 | AISI 304L |
| UNS | S30400 | S30403 |
| ASTM forged products | ASTM A182 F304 | ASTM A182 F304L |
| ASME forged products | ASME SA182 F304 | ASME SA182 F304L |
| EN | 1.4301 | 1.4307 |
| EN designation | X5CrNi18-10 | X2CrNi18-9 |
| DIN | DIN 1.4301 | DIN 1.4307 |
| Werkstoff No. | Werkstoff 1.4301 | Werkstoff 1.4307 |
| JIS Japan | SUS304 | SUS304L |
| GB China | 06Cr19Ni10 | 022Cr19Ni10 |
| Older Chinese designation | 0Cr18Ni9 | 00Cr19Ni10 |
| KS Korea | STS304 | STS304L |
| ISO | Grade 304 / related ISO designation depending product standard | Grade 304L / related ISO designation depending product standard |
| India – common market | SS304 / AISI 304 / A182 F304 | SS304L / AISI 304L / A182 F304L |
| BS / UK | 304 / 1.4301 | 304L / 1.4307 |
| GOST/Russian systems | 08Х18Н10 family, depending product specification | 03Х18Н11 family, depending product specification |
The chromium content provides a passive oxide layer that gives F304/F304L good general corrosion resistance.
F304L is particularly suitable for welded applications because of its low carbon content.
Austenitic stainless steels provide good toughness over a broad temperature range when properly specified.
F304/F304L can be machined, formed and fabricated using appropriate techniques.
304/304L stainless steel is one of the most widely used stainless steel families in industrial applications.
Properly selected and installed F304/F304L flange connections can provide reliable long-term service.
The raw materials used for manufacturing Stainless Steel 304 and 304L flanges are sourced from certified suppliers and undergo rigorous inspection. Each batch is subjected to Positive Material Identification (PMI) to ensure compliance with ASTM A240 standards, verifying the chemical composition necessary for corrosion resistance and durability in various applications.
The forming process involves the use of high-quality stainless steel sheets that are cut and shaped using advanced CNC machines. The flanges are then fabricated into various types, including slip-on, weld neck, and blind flanges, following the dimensions specified in ASME B16.5. Standard sizes range from 1/2" to 24" in diameter, with pressure ratings up to 1500 lbs. This precision ensures a perfect fit and reliable performance in piping systems.
| Process | Temperature (°C) | Medium | Purpose |
|---|---|---|---|
| Solution Annealing | 1010-1121 | Air | To dissolve precipitates and enhance corrosion resistance |
| Stress Relieving | 600-800 | Air | To relieve internal stresses from fabrication processes |
Quality inspection is a critical part of our manufacturing process for Stainless Steel 304 and 304L flanges. All products undergo a series of tests, including hardness testing, hydrostatic testing, and radiography, to ensure they meet international standards such as EN 10204 3.1 and 3.2 MTC. Our commitment to quality is backed by ISO 9001:2015 certification, ensuring that every flange is reliable and suitable for export to over 50 countries, including the UAE, USA, and Germany. Contact us for a quick quote or request a free sample MTC.
| Grade | Size / Dimension | Price (USD/Kg) | Price (INR/Kg) |
|---|---|---|---|
| 304 | 1/2" (15 mm) | $4.50 | ₹370 |
| 304L | 1" (25 mm) | $4.80 | ₹395 |
| 304 | 2" (50 mm) | $5.20 | ₹430 |
| 304L | 4" (100 mm) | $6.00 | ₹495 |
Note: Prices are indicative and subject to change based on quantity, raw material costs, and delivery terms. Contact us for the latest quotation.
Our multiple locations and strong logistics network make it easy for customers across India to source Stainless Steel 304 304L Flanges from Ferro Fittings and Alloys. Contact us for prompt delivery at competitive prices.
Ferro Fittings and Alloys exports Stainless Steel 304 304L Flanges to 50+ countries worldwide. We handle all export documentation, sea-worthy packaging, and logistics to ensure on-time, damage-free delivery anywhere in the world.
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Ferro Fittings and Alloys is a leading ISO 9001:2015 certified manufacturer, supplier, and exporter of high-quality pipe fittings, valves, flanges, round bars, sheets, plates, pipes, tubes, and expansion bellows. Based in Mumbai, India, we serve industrial sectors including oil & gas, petrochemical, power generation, pharmaceuticals, marine, and construction.
We supply a comprehensive range of grades — Stainless Steel, Duplex & Super Duplex, Carbon Steel, Alloy Steel, Inconel, Hastelloy, Monel, Titanium, Nickel, and Nimonic Alloys — to customers in 50+ countries. Our products are manufactured as per ASTM, ASME, ANSI, MSS, BS, DIN, and EN standards with EN 10204 3.1/3.2 Mill Test Certificates.
📍 Address: 6th Kumbharwada, Shop No. 154, Near Alankar Cinemas, Mumbai 400 004
📞 Mr. Aashit Shah: +91 86524 99959
📞 Mr. Bhavin Shah: +91 86550 39959
📧 Sales: export@ferrofittings.com
📧 Export: export@ferrofittings.com
📧 Gmail: inquiry@ferrofittings.com
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