Stainless Steel Flanges: Strength, Versatility, and Reliability
Stainless steel flanges are a critical component in various industries, providing secure connections between pipes, valves, pumps, and other equipment. These flanges are not only known for their strength and durability but also for their resistance to corrosion, making them an ideal choice for applications that require reliable and long-lasting connections. At ASC LLP, we take pride in being one of the leading Stainless Steel Flanges manufacturers in India, offering a wide range of flanges to meet diverse industrial needs.
What are Stainless Steel Flanges?
SS flanges are forged or cast rings of steel designed to connect sections of pipe or join them to a pressure vessel, pump, valve, or other integral flanged assemblies. The use of stainless steel enhances the flange’s resistance to corrosion, making it suitable for a wide range of applications, especially in harsh environments. These flanges are essential in industries such as oil and gas, chemical processing, power generation, and water treatment.
Stainless steel flanges are typically available in various types, including weld neck, slip-on, socket weld, lap joint, threaded, and blind flanges. Each type is designed for specific applications, ensuring that the connection is secure and leak-proof.

Properties of Stainless Steel Flanges
The properties of SS flanges are what make them the preferred choice for various industrial applications. Here are some of the key properties that set them apart:
- Corrosion Resistance: One of the most significant properties of stainless steel is its resistance to corrosion. This makes SS flanges ideal for use in environments that are prone to moisture, chemicals, and other corrosive elements.
- High Strength: SS flanges offer exceptional strength, which allows them to withstand high pressure and extreme temperatures. This makes them suitable for use in high-stress environments such as power plants and chemical processing facilities.
- Durability: The durability of SS flanges ensures that they can handle long-term use without significant wear and tear. This reduces the need for frequent replacements, resulting in lower maintenance costs.
- Heat Resistance: Flanges SS can operate effectively in high-temperature environments without losing their structural integrity. This property is particularly important in industries such as power generation and oil refining.
- Versatility: SS flanges are versatile and can be used in a wide range of applications, from domestic plumbing to large-scale industrial projects.
- Aesthetic Appeal: The polished surface of stainless steel flanges adds an aesthetic appeal to any installation, making them a preferred choice for architectural applications.
Advantages of Stainless Steel Flanges
Using stainless steel flanges in your piping system offers numerous advantages that make them a superior choice compared to other materials:
- Longevity: Stainless steel flanges are built to last, providing a long service life even in the most demanding environments. This longevity translates into cost savings over time, as there is less need for frequent replacements.
- Ease of Fabrication: Stainless steel can be easily fabricated into various shapes and sizes, allowing for customization to meet specific requirements. This ease of fabrication also contributes to quicker installation times.
- Hygiene: Stainless steel is non-porous and easy to clean, making it an excellent choice for industries where hygiene is crucial, such as food processing, pharmaceuticals, and healthcare.
- Recyclability: Stainless steel is 100% recyclable, making it an environmentally friendly option. Choosing SS flanges contributes to sustainable practices by reducing waste.
- Compatibility with Other Materials: Flanges SS are compatible with various other materials, allowing them to be used in conjunction with different types of pipes and fittings without compromising performance.
- Cost-Effectiveness: While the initial cost of SS flanges may be higher than some other materials, their durability, low maintenance requirements, and long service life make them a cost-effective solution in the long run.


Schedule and Size Chart for Stainless Steel Flanges
Nominal Pipe Size (NPS) | Flange Type | Class 150 | Class 300 | Class 600 | Class 900 | Class 1500 | Class 2500 |
1/2″ | Weld Neck, Slip-On | 3.50″ | 3.88″ | 4.25″ | 4.50″ | 4.75″ | 5.00″ |
3/4″ | Weld Neck, Slip-On | 3.88″ | 4.25″ | 4.75″ | 5.00″ | 5.25″ | 5.50″ |
1″ | Weld Neck, Slip-On | 4.25″ | 4.88″ | 5.50″ | 5.88″ | 6.25″ | 6.50″ |
1-1/2″ | Weld Neck, Slip-On | 5.00″ | 6.12″ | 7.25″ | 7.50″ | 8.50″ | 9.00″ |
2″ | Weld Neck, Slip-On | 6.00″ | 6.50″ | 7.88″ | 8.50″ | 9.50″ | 10.50″ |
4″ | Weld Neck, Slip-On | 9.00″ | 10.25″ | 11.75″ | 13.00″ | 14.00″ | 16.00″ |
6″ | Weld Neck, Slip-On | 11.00″ | 12.50″ | 14.00″ | 16.50″ | 17.50″ | 20.00″ |
8″ | Weld Neck, Slip-On | 13.50″ | 15.00″ | 16.50″ | 19.00″ | 20.50″ | 23.50″ |
Mechanical Properties Chart for Stainless Steel Flanges
Property | Value |
Tensile Strength (MPa) | 515 – 690 |
Yield Strength (MPa) | 205 – 310 |
Elongation (%) | 40 – 50 |
Hardness (Brinell) | 170 – 220 |
Impact Strength | 220 – 270 J |
Modulus of Elasticity | 193 – 200 GPa |
Fatigue Strength | 310 MPa |
Shear Strength | 205 – 260 MPa |
Specifications Chart for Stainless Steel Flanges
Specification | Standard | Description |
ASTM A182 | Standard Specification | Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves |
ANSI B16.5 | Pipe Flanges and Flanged Fittings | Nominal Pipe Size 1/2″ – 24″ |
ASTM A240 | Standard Specification | Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels |
ASME B16.47 | Large Diameter Steel Flanges | Covers NPS 26 through NPS 60 Flanges |
ASTM A351 | Standard Specification | Castings, Austenitic, for Pressure-Containing Parts |
Chemical Composition Chart for Stainless Steel Flanges
Element | Composition (%) |
Carbon (C) | 0.08 max |
Manganese (Mn) | 2.00 max |
Phosphorus (P) | 0.045 max |
Sulfur (S) | 0.030 max |
Silicon (Si) | 1.00 max |
Chromium (Cr) | 18.00 – 20.00 |
Nickel (Ni) | 8.00 – 10.50 |
Nitrogen (N) | 0.10 max |
Iron (Fe) | Balance |
Physical Properties Chart for Stainless Steel Flanges
Property | Value |
Density | 7.85 g/cm³ |
Melting Point | 1400 – 1450 °C |
Thermal Conductivity | 16.2 W/m·K at 100°C |
Specific Heat Capacity | 500 J/kg·K |
Electrical Resistivity | 0.072 x 10^-6 Ω·m at 20°C |
Coefficient of Expansion | 17.2 x 10^-6 /°C |
Application Chart for Stainless Steel Flanges
Industry | Application |
Oil and Gas | Pipeline connections, subsea applications, refinery piping |
Chemical Processing | Corrosive environments, chemical reactors, storage tanks |
Power Generation | High-temperature and high-pressure applications, turbines |
Water Treatment | Water and wastewater piping systems, desalination plants |
Food and Beverage | Hygienic connections, food processing equipment |
Pharmaceuticals | Sterile environments, pharmaceutical processing systems |
Marine | Shipbuilding, offshore platforms, seawater systems |
Pulp and Paper | Bleaching plants, paper mills, chemical pulp processing |
Stainless Steel Flanges Manufacturers in India
India is home to some of the world’s leading Stainless Steel Flanges manufacturers, with ASC LLP being a prominent name in the industry. Our commitment to quality, innovation, and customer satisfaction has earned us a reputation as a trusted supplier of SS flanges both domestically and internationally.
Stainless Steel Flanges Suppliers
As leading Stainless Steel Flanges suppliers, ASC LLP ensures that our products meet the highest standards of quality and performance. We source our raw materials from reputable suppliers and employ stringent quality control measures throughout the manufacturing process. This ensures that every flange we produce is of the highest quality and meets the specific needs of our customers.
Our extensive inventory and efficient supply chain management enable us to meet the demands of our clients promptly, whether they require small quantities or bulk orders. We are committed to providing our customers with flanges that meet their exact specifications, delivered on time and within budget.
Global Reach
Amardeep Steel Centre boasts a robust global presence, committed to delivering unparalleled service and quality to clients around the world. Our dedication to prompt delivery and exceptional customer care sets us apart in the industry. Major corporations across the USA, Europe, Asia, and other regions place their trust in our high-quality Stainless Steel Flanges. This widespread trust underscores our reputation for reliability and excellence. By consistently meeting and exceeding the expectations of our international clientele, we continue to solidify our position as a leader in the global steel market.

Countries We Export To
UNITED STATES, EUROPE, UK, UAE, SAUDI ARABIA, OMAN, KUWAIT, JORDAN, QATAR, INDONESIA, MALAYSIA, BRAZIL, SPAIN, ITALY, FRANCE, GERMANY, BAHRAIN, SRI LANKA, AZERBAIJAN, AUSTRALIA, AUSTRIA, PHILIPPINES, TURKEY, RUSSIA, IRAN, IRAQ, CANADA, KOREA, JAPAN, YEMEN, FINLAND, ZIMBABWE, HUNGARY, PORTUGAL, VIETNAM, MOROCCO, THAILAND, SOUTH AFRICA, MEXICO, SINGAPORE, GREECE, KUWAIT, POLAND, NEW ZEALAND, SWEDEN, SWITZERLAND, BELGIUM, BHUTAN, BANGLADESH, TAIWAN, ROMANIA, CAMBODIA, KAZAKHSTAN, AFGHANISTAN.