Inconel 625 Flanges Manufacturer & Supplier

Table of Content

We, Bhansali Nickel Alloys, are a trusted manufacturer of Inconel 625 flanges. This specific alloy is a nickel-chromium-molybdenum material with niobium addition. It consists of at least 58% nickel for high strength against stress corrosion cracking. The 20-23% chromium content protects the metal from oxidising chemicals. It works well from very low temperatures up to 1093°C. Because of the 8-10% molybdenum, these flanges do not get damaged easily by pitting or crevice corrosion even when exposed to seawater. Our Inconel 625 flanges are manufactured according to the ASTM B564 standard to ensure that every piece can handle the pressure it is designed for without failing. These flanges are critical parts used to connect pipes, valves, and pumps in piping systems that face extreme conditions.

We have built a big name for ourselves by keeping our quality high and our delivery times short. Our infrastructure has the latest machines for cutting, forging, and finishing. We make sure our flanges meet mill standards and international requirements. Customers trust us because we provide solid proof of quality with every order. Our reputation is built on the fact that we do not cut corners when it comes to the safety of your piping systems.

Inconel 625 Flanges Specifications

The following details provide the technical framework and standard dimensions for the flanges we produce in our facility.

Specification Item	Details
Material Grade	Inconel 625 (UNS N06625 / Alloy 625 / Werkstoff 2.4856)
Standard Specification	ASTM B564 / ASME SB564 (Nickel Alloy Flanges)
Dimensions Standards	ANSI/ASME B16.5, B16.47 Series A & B, B16.48, EN 1092-1, DIN, BS4504, JIS
Size Range	½″ (15 NB) to 48″ (1200 NB)
Pressure Class	150#, 300#, 600#, 900#, 1500#, 2500#; PN6, PN10, PN16, PN25, PN40, PN64
Flange Face Types	Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
Manufacturing Process	Forged, Heat Treated, Machined
Testing	PMI Test, Mechanical Test, Hardness Test, Intergranular Corrosion Test
Applications	Oil & Gas, Petrochemical, Chemical Processing, Marine, Power Generation

Chemical Composition of Inconel 625

The table below shows the exact breakdown of the elements that make this alloy so resistant to heat and rust.

Element	% Composition
Nickel (Ni)	58.0 min
Chromium (Cr)	20.0 – 23.0
Molybdenum (Mo)	8.0 – 10.0
Niobium + Tantalum (Nb + Ta)	3.15 – 4.15
Iron (Fe)	5.0 max
Manganese (Mn)	0.50 max
Silicon (Si)	0.50 max
Carbon (C)	0.10 max
Phosphorus (P)	0.015 max
Sulfur (S)	0.015 max
Aluminum (Al)	0.40 max
Titanium (Ti)	0.40 max

Types of Inconel 625 Flanges

There are many different shapes of flanges because every piping system has different needs for space and pressure.

Slip-On Flange

These flanges slide over the end of the pipe and are welded both inside and outside to provide enough strength. They are very easy to align and cost less than other types, which makes them a popular choice for many projects.

Weld Neck Flange

You can recognise these by the long tapered hub that is joined to the pipe with a butt weld. This design transfers stress to the pipe itself, which helps the flange survive in high-pressure environments or where there is a lot of vibration.

Socket weld Flange

These are mainly used for smaller pipe sizes that work under high pressure. The pipe is put into a recessed area of the flange and then welded around the top to create a smooth flow of liquid inside.

Blind Flange

We make these without a centre hole so they can be used to block off the end of a piping system or a pressure vessel opening. These are heavy pieces because they must handle the full pressure of the gas or liquid pushing against them.

Threaded Flange

These have threads inside the bore that match the external threads on a pipe. They are great for situations where welding is not allowed or would be dangerous, such as in areas with explosive gases.

Lap Joint Flange

This type is used along with a stub end that is welded to the pipe. The flange itself can rotate freely around the stub end, which makes it very easy to align bolt holes during the installation process.

Ring Type Joint Flange

Commonly called RTJ flanges, these have a groove cut into their face to hold a metal ring gasket. When the bolts are tightened, the metal ring squashes into the groove to create a seal that can handle incredibly high pressures and temperatures.

Long Weld Neck Flange

These look like standard weld neck flanges but they have a much longer neck. They are often used as nozzles for large tanks or boilers where the flange needs to stick out further from the main body.

Spectacle Blind Flange

This is a safety device made of two metal discs joined together, looking like a pair of glasses. One disc is solid and the other has a hole, allowing workers to quickly shut off or open a pipe section for maintenance.

Pressure Class & Size Range

We offer a wide variety of pressure ratings and sizes to make sure we have the right fit for every industrial setup.

Pressure Class	Size Range (NPS)	Size Range (NB)	Applicable Standard
Class 150	½″ – 24″	15 NB – 600 NB	ASME B16.5
Class 300	½″ – 24″	15 NB – 600 NB	ASME B16.5
Class 600	½″ – 24″	15 NB – 600 NB	ASME B16.5
Class 900	½″ – 24″	15 NB – 600 NB	ASME B16.5
Class 1500	½″ – 24″	15 NB – 600 NB	ASME B16.5
Class 2500	½″ – 24″	15 NB – 600 NB	ASME B16.5
Class 150	26″ – 48″	650 NB – 1200 NB	ASME B16.47 Series A & B
Class 300	26″ – 48″	650 NB – 1200 NB	ASME B16.47 Series A & B
Class 600	26″ – 48″	650 NB – 1200 NB	ASME B16.47 Series A & B

Inconel 625 Flanges vs Other Nickel Alloys

Inconel 625 is often compared to Inconel 600 or Inconel 718. The main difference is the addition of molybdenum and niobium. While Inconel 600 is good for general heat resistance, it lacks the specialised corrosion protection that 625 offers in moist, salty environments. Inconel 718 is much harder to weld because it is designed for extreme mechanical strength in jet engines.

We find that Inconel 625 is the best alloy for chemical plants. It is easier to fabricate than 718 but much tougher than 600. It handles phosphoric acid and organic acids better than most stainless steels. Many engineers choose 625 when they need a metal that won’t crack under high stress in a sour gas environment.

Feature	Inconel 625	Inconel 600	Inconel 718	Monel 400
Main Use	High heat & heavy corrosion	General heat resistance	Extreme strength	Sea water & acids
Pitting Resistance	Excellent	Moderate	Good	Moderate
Weldability	Very easy	Easy	Difficult	Easy
Strength	Very high	Moderate	Highest (Hardened)	Moderate

High-Strength Forging Process of Inconel 625

The way we make these flanges starts with high-quality raw material. We heat the alloy to a very high temperature, usually between 1000°C and 1200°C. This makes the metal soft enough to shape but not so hot that it loses its internal strength. We use massive forging presses to beat the metal into the rough shape of a flange. This pressure changes the grain structure of the metal, making it much stronger than a part that is simply cast in a mould.

After the forging is done, we cool the metal down carefully. Next to the forging, the heat treatment process is the most important part. We use solution annealing to make sure all the elements inside the alloy are spread out evenly. This prevents any weak spots from forming. Finally, we use precision lathes to machine the flange to its final size and drill the bolt holes exactly where they need to be.

Corrosion & Fatigue Performance in Harsh Environments

Inspection, Testing & Certification

We never send out a product without checking it thoroughly to ensure it meets our high standards.

Global Supply & Export Packaging

We ship our products to customers all over the world. Shipping heavy metal parts across oceans requires very good packaging. We use strong wooden crates that are treated to prevent bugs. Every flange is coated in a special oil to prevent any surface rust during the long journey. We also use plastic caps to protect the machined faces and the threads of the flanges. Our team makes sure all the paperwork for customs is ready so there are no delays at the borders.

Applications & Industries

These flanges are used in various industrial applications where failure is not an option.

Oil and Gas Industry

In offshore drilling, the pipes are exposed to salt water and high-pressure oil. Our flanges are used on wellheads and subsea equipment because they do not rust in the ocean.

Chemical Processing

Plants that make plastics or fertilisers use very strong acids. Inconel 625 flanges are used in the vessels and piping that hold these chemicals because the alloy does not dissolve or weaken when it touches acid.

Marine Engineering

Ships and submarines use these flanges in their propulsion systems and seawater cooling loops. The ability to resist the constant attack of saltwater makes them perfect for long-term use at sea.

Aerospace Industry

We supply flanges for exhaust systems and engine parts in planes. The metal can handle the extreme heat of burning fuel without melting or losing its shape.

Power Generation

Nuclear power plants and geothermal plants use our flanges in their heat exchangers. The metal stays stable even when exposed to high-radiation or high-pressure steam for many years.

Trusted Inconel 625 Flanges Manufacturer in India

Choosing Bhansali Nickel Alloys means you are choosing 29 years of experience and a commitment to quality. We are one of the leading manufacturers in India because we focus on the small details. Our factory uses the best technology to ensure every flange is perfect. We have a team of experts who understand the science behind nickel alloys.

We keep a large stock of standard sizes so we can ship them to you immediately. If you need a special size, please contact us, and our designers can create a custom plan for you. Our prices are competitive, but we never lower our quality to save money. We provide a full test certificate with every order so you know exactly what is in the metal. You can visit our website to see our full range of products or talk to our team about your specific project needs.

Frequently Asked Technical Questions

What industries use Inconel 625 flanges?

The industries such as oil and gas, aerospace, chemical processing, and marine engineering use Inconel 625 flanges.

Is Inconel 625 suitable for offshore use?

Yes, the Inconel 625 is suitable for offshore use due to its high resistance to seawater corrosion, pitting, and crevice corrosion.

What ASTM standard covers Inconel 625 flanges?

The ASTM B564 standard covers Inconel 625 flanges.

Are these flanges corrosion and fatigue resistant?

Yes, the Inconel 625 flanges are resistant to corrosion and fatigue due to their high nickel-chromium-molybdenum composition.

Do you provide export-quality packaging?

Yes, we at Bhansali Nickel Alloys do provide export-quality packaging.

Can you supply custom-machined flanges?

Yes, we can supply custom-machined flanges as per your requirements.

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