Duplex Steel UNS S31803 Flanges Exporters in India

Author : Himanshu Sanghavi | Published On : 13 Jul 2026

Duplex Steel UNS S31803 Flanges are widely used in industries that require high strength, corrosion resistance, and reliable performance in demanding operating conditions. Manufactured with a balanced combination of austenitic and ferritic stainless steel, these flanges offer good mechanical properties and resistance to chloride stress corrosion cracking, pitting, and crevice corrosion. They are commonly used in oil and gas, petrochemical, chemical processing, marine engineering, offshore platforms, desalination plants, power generation, pulp and paper, and heat exchanger applications.

Steel Icon Stainless Pvt. Ltd. is a Duplex Steel UNS S31803 Flanges Manufacturer, Supplier, Stockist, and Exporter in India, supplying flanges manufactured according to international standards for industrial piping systems. The company offers products in different sizes, pressure classes, and specifications to meet the requirements of various industries.

Duplex Steel UNS S31803 Flanges are manufactured from an alloy containing approximately 22% Chromium, 5% Nickel, 3% Molybdenum, and Nitrogen. This composition provides good resistance to corrosion while maintaining higher strength than many conventional stainless steel grades. The material is suitable for applications involving seawater, chemicals, and other corrosive environments.

These flanges are produced in accordance with ASTM A182 F51, ASME B16.5, ASME B16.47, EN 1.4462, MSS SP-44, and ANSI standards. Duplex Steel UNS S31803 Flanges are available in pressure ratings including Class 150, Class 300, Class 600, Class 900, Class 1500, and Class 2500. Standard sizes generally range from ½ inch to 48 inches, with custom sizes available based on project specifications.

As Duplex Steel UNS S31803 Flanges Suppliers in India, Steel Icon Stainless Pvt. Ltd. supplies different flange forms for industrial piping systems. Available forms include Weld Neck Flanges, Slip-On Flanges, Blind Flanges, Socket Weld Flanges, Threaded Flanges, Lap Joint Flanges, Orifice Flanges, Ring Type Joint Flanges, Long Weld Neck Flanges, and Spectacle Blind Flanges. These forms are selected according to the pressure rating, pipe size, and application.

Duplex Steel UNS S31803 Weld Neck Flanges are commonly used in high-pressure and high-temperature piping systems because they provide a strong welded connection. Slip-On Flanges are used where simple installation is required, while Blind Flanges are used to close the end of piping systems or pressure vessels. Socket Weld Flanges are generally selected for small-bore piping where a secure joint is required.

Steel Icon Stainless Pvt. Ltd. is also a Duplex Steel UNS S31803 Flanges Exporter, supplying products to customers in the UAE, Saudi Arabia, Qatar, Kuwait, Oman, Bahrain, Singapore, Malaysia, Indonesia, South Africa, Nigeria, the United States, Canada, the United Kingdom, Germany, Italy, France, and Australia. Products are supplied according to customer specifications with suitable packaging for domestic and international transportation.

The properties of Duplex Steel UNS S31803 Flanges make them suitable for applications exposed to seawater, chlorides, and chemical processing environments. Their higher yield strength allows the use of thinner sections in certain applications, helping reduce the overall weight of piping systems while maintaining mechanical performance.

Duplex Steel UNS S31803 Flanges Manufacturers in India generally manufacture products that undergo quality checks such as PMI Testing, Hydrostatic Testing, Ultrasonic Testing, Radiography Testing, Hardness Testing, and Third-Party Inspection. Material Test Certificates in accordance with EN 10204 3.1 or 3.2 are also available based on project requirements.

As Duplex Steel UNS S31803 Flanges Stockists in India, Steel Icon Stainless Pvt. Ltd. maintains inventory in commonly used sizes and pressure classes to support regular industrial requirements and project schedules. Standard products are available for various piping applications, while customized specifications can also be supplied when required.

Duplex Steel UNS S31803 Flanges offer good weldability, corrosion resistance, and mechanical strength. They are commonly used in pipelines, pressure vessels, offshore structures, marine equipment, desalination plants, fertilizer plants, chemical processing units, refineries, and power generation facilities where corrosion resistance and structural strength are important.

Steel Icon Stainless Pvt. Ltd. supplies Duplex Steel UNS S31803 Flanges in accordance with international standards for customers in India and overseas. As a Duplex Steel UNS S31803 Flanges Manufacturer in India, Duplex Steel UNS S31803 Flanges Supplier in India, Duplex Steel UNS S31803 Flanges Stockist in India, and Duplex Steel UNS S31803 Flanges Exporter in India, the company supplies products for a wide range of industrial piping applications.