Stainless Steel 304 Flanges are among the most widely used flanges across industries due to their excellent corrosion resistance, strength, and long service life. These flanges are manufactured using high- quality austenitic stainless steel, making them suitable for applications involving pressure, temperature variations, and aggressive environments.
We are a Stainless Steel 304 Flange Supplier & Manufacturer, offering a complete range of SS 304 Flanges in various sizes, pressure classes, and types as per international standards. Our flanges are trusted by customers across oil & gas, petrochemical, power generation, water treatment, food processing, and pharmaceutical industries.
What Are Stainless Steel 304 Flanges?
Stainless Steel UNS S30400 Flanges are made from an 18-8 stainless steel alloy containing approximately 18% chromium and 8% nickel. This composition provides excellent resistance to oxidation and corrosion, along with good mechanical strength and weldability.
SS 304 flanges are commonly manufactured in accordance with ASTM A182 / ASME SA182 F304, ensuring superior quality, dimensional accuracy, and consistent performance under pressure.
Stainless Steel 304 Flange Standards & Specifications
We manufacture and supply flanges as per internationally recognized specifications:
- Material Grade: ASTM A182 F304 / ASME SA182 SS 304
- UNS Number: UNS S30400
- DIN Grade: DIN 1.4301 / DIN 1.4307
- Japanese Standard: SUS 304
- Pressure Class: 150, 300, 600, 900, 1500, 2500
- Size Range: ½” NB to 48” NB
- Manufacturing Type: Forged / Plate / Machined
All flanges undergo strict quality checks to ensure durability and safety in real-world operating conditions.
Types of Stainless Steel 304 Flanges We Offer
➤ SS 304 Slip-On Flange
SS 304 Slip-On Flanges are easy to install and cost-effective. The pipe slips into the flange and is welded on both sides for added strength. These flanges are commonly used in low to medium pressure systems.
Keywords used:- SS 304 Slip-on Flange
- 304 Stainless Steel Slip On Flanges
- A182 F304 SORF Flange
➤ SS 304 Weld Neck Flange
SS 304 WNRF Flanges feature a long tapered hub that reduces stress concentration, making them ideal for high-pressure and high-temperature applications.
We are recognized as a SS 304 WNRF Flange Manufacturer in Mumbai, India, supplying flanges with excellent mechanical performance and precise machining.
➤ SS 304 Blind Flange
ASME SA182 SS 304 Blind Flanges are used to close the end of a piping system. These flanges are ideal for pressure testing, future expansion, and maintenance work.
Customers often inquire about ASME SA182 SS 304 Blind Flanges Price in India, and we ensure competitive pricing without compromising on quality.
➤ SS 304 Lap Joint Flange
SS 304 Lap-Joint Flanges are used with stub ends and are ideal where frequent dismantling is required. They allow easy alignment and are cost-effective in systems using expensive alloys.
Popular variants include:- SS DIN 1.4301 Lap Joint Flange
- SUS 304 Lap Joint Flanges
- SS 304 Lose Flange
➤ SS 304 Screwed / Threaded Flange
Stainless Steel DIN 1.4307 Screwed Flanges are used where welding is not possible. These flanges are ideal for low-pressure and non-critical applications.
➤ SS 304 Reducing Flange
SS 304 Reducing Flanges help connect pipes of different diameters while maintaining smooth flow and system integrity.
➤ SS 304 Long Weld Neck Flange
SS 304 Long Weld Neck Flangess are designed for high-pressure applications where reinforcement and extended neck length are required.
We are among trusted SS 304 Long Weld Neck Flanges Suppliers in Mumbai, providing flanges for critical industrial applications.
➤ SS 304 Orifice Flange
SS 304 Orifice Flanges are used for flow measurement systems and are supplied with precise pressure tap machining.
➤ SS 304 Nipo-Flange
SS 304 Nipo-Flanges combine a nipple and flange in one forged piece, reducing weld joints and leakage risks in high-pressure systems.
➤ SS UNS S30400 Plate & Pipe Flanges
- SS UNS S30400 Plate Flanges – Machined from stainless steel plates
- SS UNS S30400 Pipe Flanges – Manufactured using forged or pipe sections
Both types meet stringent dimensional and mechanical requirements.
Stainless Steel 304 Flange Standards & Specifications
We manufacture and supply flanges as per internationally recognized specifications:
- Material Grade: ASTM A182 F304 / ASME SA182 SS 304
- UNS Number: UNS S30400
- DIN Grade: DIN 1.4301 / DIN 1.4307
- Japanese Standard: SUS 304
- Pressure Class: 150, 300, 600, 900, 1500, 2500
- Size Range: ½” NB to 48” NB
- Manufacturing Type: Forged / Plate / Machined
All flanges undergo strict quality checks to ensure durability and safety in real-world operating conditions.
Applications of SS 304 Flanges
Based on our industry experience, Stainless Steel UNS S30400 Flanges are widely used in:
- Oil & Gas pipelines
- Petrochemical plants
- Chemical processing units
- Food & beverage industries
- Pharmaceutical manufacturing
- Water treatment systems
- Power generation plants
- Marine and offshore projects
Their versatility makes them suitable for both corrosive and hygienic environments.
Mechanical Properties – Stainless Steel 304 Flanges (ASTM A182 F304 / ASME SA182 SS 304)
| Property | Value |
|---|---|
| Tensile Strength | 515 MPa (minimum) |
| Yield Strength (0.2% Offset) | 205 MPa (minimum) |
| Elongation | 40% minimum |
| Reduction of Area | 50% minimum |
| Hardness (Brinell) | ≤ 201 HB |
| Impact Strength | Excellent toughness at low temperatures |
| Modulus of Elasticity | 193 GPa |
Chemical Composition – SS 304 Flanges
| Element | Percentage (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Chromium (Cr) | 18.0 – 20.0 |
| Nickel (Ni) | 8.0 – 10.5 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Iron (Fe) | Balance |
Physical Properties – Stainless Steel UNS S30400 / DIN 1.4301 Flanges
| Physical Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Range | 1400 – 1450°C |
| Thermal Conductivity | 16.2 W/m·K (at 100°C) |
| Specific Heat Capacity | 500 J/kg·K (at 0–100 °C) |
| Electrical Resistivity | 0.72 µΩ·m (at 20°C) |
| Specific Heat Capacity | 500 J/kg·K |
| Coefficient of Thermal Expansion | 17.2 µm/m·°C (20–100°C) |
| Magnetic Properties | Non-magnetic (may become slightly magnetic after cold working) |
Manufacturing Process & Quality Assurance
As an experienced Stainless Steel 304 Flange Manufacturer, we follow a controlled manufacturing process:
- Selection of certified raw material
- Forging or plate cutting
- Heat treatment (solution annealing if required)
- CNC machining for accuracy
- Dimensional and visual inspection
- Mechanical and chemical testing
- Final packing and dispatch
Why Choose Us as Your Stainless Steel 304 Flange Supplier?
We understand that customers don’t just look for products—they look for reliability, expertise, and trust. That’s why we focus on:
- Consistent product quality
- Competitive pricing
- On-time delivery
- Technical support from experienced professionals
- Custom sizes and specifications
As one of the trusted Manufacturers of SS 304 Pipe Flange in India, we serve both domestic and international clients with equal commitment.
Stainless Steel DIN 1.4301 Flanges Exporters in India
We supply ASTM A182 F304 Flanges Manufacturer In India standards to clients across Asia, the Middle East, Europe, and Africa. Each shipment is securely packed and supplied with complete test documentation.
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