Metco Overseas is a well-known and respected manufacturer and exporter in Mumbai, India of Duplex Steel UNS S31803 Flanges in standard and customized sizes and standards. UNS S31803 Duplex Steel is a commonly used grade with a good chemical composition and high tensile strength. This is a chromium, molybdenum, and nickel alloy with exceptional pitting and crevice corrosion resistance. This alloy has a chromium content of 25%, a molybdenum content of 4%, and nickel content of 7%. 

We’re working on high-quality, high-performance flanges using a pure grade alloy that has exceptional resistance to general corrosion and chloride pitting corrosion in extreme situations. For the development of Duplex Steel UNS S31803 Flanges, the highest quality raw material is obtained from a well-known global supplier. Before being used, the raw material is thoroughly checked to ensure that no low-quality flanges are created.

To produce top grade Duplex Steel UNS S31803 Flanges, Kalikund Steel & Engg. Co has a hi-tech manufacturing operation with innovative equipment and cutting-edge gear. These flanges are available in a variety of sizes, diameters, and custom specifications to meet the needs of both domestic and international customers. We manufacture duplex steel flanges of all varieties in accordance with national and international quality standards. Our UNS S31803 Duplex Steel Flanges feature a superior finish, are easy to fabricate, shape, and have a longer working life.

Our global customers can acquire high-quality duplex steel flanges with these benefits at extremely affordable prices that meet their budgets properly. To create and offer top-notch quality Duplex Steel UNS S31803 Flanges, our highly qualified and skilled crew works seamlessly using novel procedures and current tools.

Our quality specialists at Metco Overseas maintain the quality and performance of Duplex Steel UNS S31803 Flanges by performing various tests on them at various stages of manufacture. Each duplex steel flange is subjected to a series of destructive and non-destructive quality tests under tight supervision in order to verify a variety of flange characteristics. We keep a ready stock of Duplex Steel UNS S31803 Flanges on hand to provide prompt delivery in the event of an emergency.

These duplex steel flanges are packed using appropriate packing material after passing the testing process to protect them from corrosion and rust during transit. We provide safe delivery to our clients’ locations all over the world in the shortest period possible.

Keywords :- s31803 duplex, Duplex Steel S31803 Flanges Manufacturer in Mumbai, India

Materials for Flanges

Stainless Steel

Mild Steel

Types of Flanges

Threaded Flange

Also known as a screwed flange, this style has a thread inside the flange bore which fits with the matching male thread on the pipe or fitting. The threaded connection means you can avoid welding in many use cases. Simply match the threading to the pipes you wish to connection for Flanges Manufacturers.

Socket-Weld Flanges

Ideal for smaller pipe diameters in low-temperature and low-pressure scenarios, socket-weld flanges feature a connection in which you place the pipe into the flange and then secure the connection with a single multi-pass fillet weld. This makes this style simpler to install than other welded flange types while avoiding the limitations associated with threaded ends.

Slip-on Flanges

Slip-on flanges are very common and are available in a large range of sizes to accommodate systems with higher flow rates and throughput. Simply match the flange to the outer diameter of the pipe you intend to connect. Installation is slightly more technical as you’ll need fillet weld both sides to secure the flange to the pipe.

Lap Joint Flanges

Featuring a two-piece design, lap joint flanges require butt welding of the stub end to the pipe or fitting with the use of a backing flange to create the flanged connection. This design makes this style popular for use in systems with limited physical space or systems which require frequent dismantling and maintenance to Flanges Manufacturers.

Weld Neck Flanges

Like lap joint flanges, weld neck flanges require butt welding for installation. However, their integrity, performance in systems with multiple repeat bends, and the ability to use them in high-pressure and high-temperature systems make them a leading choice for process piping.

Blind Flanges

Used for terminating or isolating piping systems, blind flanges are essentially boltable blank discs. When installed properly and combined with the correct gaskets, they can achieve an outstanding seal which is easy to remove when needed.

Specialty Flanges

The flange types listed above are the most common. However, there is a range of additional specialized flange types available to suit a range of uses and environments. Other options include nipoflanges, weldoflanges, expanding flanges, orifice, long weld neck and reducing flanges.

Flange Dimensions and Common Considerations

Other than the functional design of a flange, its dimensions are the most likely factors which has an on the choices of impact flange while designing, maintaining and updating the piping system. Whereas one must consider the interfaces of flange with the pipe and the gasket which are in use in order to ensure the proper sizing. Other than this some of the common considerations are as follows:

Outside diameter

The outside diameter refers to the distance between the two opposing edges of the flange face.


The thickness is measured from the outer side of the rim.

Bolt circle diameter

This is referred to as the distance between the opposing bolt holes which is measured from Centre to Centre.

Pipe size

Pipe size refers to as that dimension through which the flange gets corresponded.

Nominal bore size

Nominal bore size is the measurement of inner diameter of the flange connector.

Common face types include:

Making the Connection: Flange Facing Types

Flange design is only the start when considering the ideal flange for your piping system. Face types are another characteristic that will have a major impact on the final performance and service life of your flanges.

Facing types determine both the gaskets needed to install the flange and characteristics related to the seal created.

Applications of flanges

A flange is a method of connecting pipes, valves, pumps, and other equipment to form a piping system. It also provides easy access for cleaning, inspection, or modification. Flanges are usually welded or screwed.

In many applications, engineers need to find a way to close off a chamber or cylinder in a very secure fashion, usually because the substance inside must differ from the substance outside in composition or pressure.

They do this by fastening two pieces of metal or other material together with a circle of bolts on a lip. This “lip” is a flange.




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