Inconel Flanges Manufacturer & Supplier

When your applications operate in the most demanding, corrosive, and high-temperature environments where ordinary materials falter, you need a solution engineered for extremes. Welcome to Solitaire Overseas, your foremost Inconel Flanges Manufacturer & Supplier. We specialize in delivering exceptionally high-performance flanges, meticulously engineered from a range of superior Inconel alloys, including the highly sought-after Inconel 600 Flanges, Inconel 625 Flanges, Inconel 718 Flanges, and Inconel 825 Flanges.

Each grade is specifically designed and manufactured to meet and exceed the stringent, often punishing, demands of critical industries such as aerospace, chemical processing, marine engineering, offshore oil and gas, power generation, and nuclear applications. When reliability is non-negotiable and performance under pressure is paramount, Solitaire Overseas provides the Inconel flange solutions you can stake your reputation on.

At Solitaire Overseas, we understand that the integrity of your piping systems and pressure equipment hinges on the quality of every component. That’s why our Inconel Flanges are not just manufactured; they are precision-engineered masterpieces, forged and machined to exacting standards. Our commitment to excellence is unwavering, ensuring that every flange we deliver offers unparalleled resistance to extreme temperatures, aggressive corrosion, and intense mechanical stress. Partner with us, and experience the confidence that comes from using Inconel flanges built to endure, perform, and protect your critical assets.

What Makes Inconel Flanges the Ultimate Choice for Extreme Environments?

So, what exactly are these remarkable Inconel Flanges, and why are they the go-to solution when conditions get tough? Inconel is not a single material but a family of austenitic nickel-chromium-based superalloys, renowned for their exceptional resistance to oxidation, corrosion, and high-temperature strength. These alloys are specifically designed to maintain their structural integrity and mechanical properties even when exposed to environments that would cause rapid degradation in most other metals.

What are Flanges and Why are They Critical?

Flanges are essential components in any piping system. They are typically disc-shaped, ring-like, or collared fittings that allow for the mechanical connection (or disconnection) of pipes, valves, pumps, and other equipment to form a complete, functional piping network. They provide:

Easy Assembly and Disassembly: Facilitating maintenance, inspection, and modification of piping systems.
Leak-Proof Sealing: When combined with appropriate gaskets and bolting, flanges create secure, pressure-tight joints.
Strength and Rigidity: Adding structural integrity to the piping system.
Versatility: Available in numerous types, sizes, and pressure ratings to suit diverse applications.

By choosing Inconel Flanges from Solitaire Overseas, you are selecting a solution engineered for longevity, reliability, and safety in your most critical and challenging service conditions. We specialize in a range of Inconel grades to ensure you get the perfect match for your specific environmental and operational demands.

Specifications of Inconel Flange

To ensure our Inconel Flanges precisely meet your project's exacting technical demands, a clear understanding of their detailed specifications is crucial. Solitaire Overseas manufactures and supplies Inconel flanges in strict accordance with international standards and your unique requirements:

Specification Element	Details & Options Available at Solitaire Overseas
Governing Standards	ASTM B564 / ASME SB564: Standard Specification for Nickel Alloy Forgings (This is the primary standard covering Inconel and other nickel alloy flanges). We also comply with relevant dimensional standards like ASME B16.5, ASME B16.47 Series A & B, BS EN 1092, API 6A, etc.
Common Inconel Grades Supplied	Inconel 600 (UNS N06600 / W.Nr. 2.4816) Inconel 601 (UNS N06601 / W.Nr. 2.4851) Inconel 625 (UNS N06625 / W.Nr. 2.4856) Inconel 718 (UNS N07718 / W.Nr. 2.4668) Inconel X-750 (UNS N07750 / W.Nr. 2.4669) Inconel 800/800H/800HT (UNS N08800/N08810/N08811) Inconel 825 (UNS N08825 / W.Nr. 2.4858) (Other Inconel grades available upon specific request)
Size Range (Nominal Pipe Size - NPS)	From ½ inch (15NB) up to 48 inches (1200NB). Larger sizes can often be custom manufactured.
Pressure Ratings / Classes	Class 150, Class 300, Class 400, Class 600, Class 900, Class 1500, Class 2500 (as per ASME B16.5 & B16.47) PN 2.5, PN 6, PN 10, PN 16, PN 25, PN 40, PN 63, PN 100, PN 160, PN 250, PN 320, PN 400 (as per DIN/EN standards) API ratings (e.g., 2000 PSI to 20000 PSI) available for specific flange types.
Common Flange Types Manufactured	Weld Neck (WN/WNRF), Slip-On (SO/SORF), Blind (BL/BLRF), Socket Weld (SW), Threaded (THRD/NPT), Lap Joint (LJ) (with Stub Ends), Long Weld Neck (LWN), Orifice Flanges (with orifice plates), Ring Type Joint (RTJ) Flanges, Reducing Flanges, Spectacle Blinds / Figure-8 Blanks, Spade & Ring Spacers, Custom Designed Flanges.
Flange Face Types	Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Tongue & Groove (T&G), Male & Female (M&F).
Manufacturing Process	Forged Construction: All our Inconel flanges are manufactured from high-quality forgings (open-die or closed-die forging) to ensure superior metallurgical integrity, refined grain structure, and optimal mechanical properties. Heat Treatment: Appropriate solution annealing, age hardening (for grades like 718, X-750), or stress relieving is performed as per standard requirements or customer specifications to achieve desired properties. Precision CNC Machining: For accurate dimensions, facing, drilling, and finishing.
Available Surface Finishes	Stock Finish (Standard for RF/FF flanges): A continuous spiral or phonographic serrated finish (e.g., 125-250 AARH) for optimal gasket seating. Smooth Finish: For specific gasket types or applications. Mirror Finish (Polished): For sanitary or high-purity applications. Concentric Serrated Finish. <br/> Cold Water Finish (Smooth for RTJ). Zinc Plated, Cadmium Plated, or other protective coatings (less common for Inconel but available if specified for specific environmental reasons, though Inconel's inherent corrosion resistance often makes these unnecessary).
Marking & Stamping	As per ASTM B564 and relevant dimensional standards (e.g., ASME B16.5), typically including Manufacturer's Mark, Material Grade, Heat Number, Size, Pressure Rating, Standard, and Flange Type. Custom marking available.

This comprehensive suite of specifications ensures that Solitaire Overseas can provide Inconel Flanges precisely engineered to integrate seamlessly into your systems and perform reliably under the most challenging conditions.

Material Details & Chemical Composition Inconel Grades

Inconel alloys are engineered for resilience. These high-performance nickel-chromium-based materials are specifically formulated to maintain mechanical strength and corrosion resistance in some of the world’s most extreme conditions. Whether exposed to seawater, acids, oxidizing agents, or elevated temperatures, Inconel flanges deliver consistent performance with minimal degradation. Below is a detailed breakdown of the chemical composition of the most widely used Inconel grades — each tailored to meet critical industrial demands.

Chemical Composition of Inconel Alloys (% by weight)

Element	Inconel 600	Inconel 625	Inconel 601	Inconel 718	Inconel 825
Nickel (Ni)	≥ 72.0	≥ 58.0	58.0–63.0	50.0–55.0	38.0–46.0
Chromium (Cr)	14.0–17.0	20.0–23.0	21.0–25.0	17.0–21.0	19.5–23.5
Iron (Fe)	≤ 10.0	Balance	Balance	Balance	Balance
Molybdenum (Mo)	—	8.0–10.0	—	2.8–3.3	2.5–3.5
Niobium + Ta	—	3.15–4.15	—	4.75–5.50	—
Cobalt (Co)	—	≤ 1.0	≤ 1.0	≤ 1.0	≤ 1.0
Carbon (C)	≤ 0.15	≤ 0.10	≤ 0.10	≤ 0.08	≤ 0.05
Aluminum (Al)	—	≤ 0.40	1.0–1.7	0.2–0.8	≤ 0.20
Titanium (Ti)	—	≤ 0.40	≤ 0.60	0.65–1.15	0.6–1.2
Manganese (Mn)	≤ 1.0	≤ 0.50	≤ 1.0	≤ 0.35	≤ 1.0
Silicon (Si)	≤ 0.5	≤ 0.50	≤ 0.5	≤ 0.35	≤ 0.5
Sulfur (S)	≤ 0.015	≤ 0.015	≤ 0.015	≤ 0.015	≤ 0.015

Standards & Certifications for Inconel Flanges

At Solitaire Overseas, quality is not an afterthought; it is the fundamental principle that governs every aspect of our Inconel Flanges manufacturing and supply chain. We are deeply committed to providing products that meet the most stringent international standards and your exacting project specifications. Our robust Quality Assurance (QA) program ensures that every flange delivers reliability and performance.

Standard / Certification	Description
ASTM B564	Standard specification for forged fittings, flanges, valves, and parts made of Inconel alloys like 600, 625, 718, etc.
ASME B16.5	Covers dimensional standards for flanges from ½” to 24” nominal sizes.
ASME B16.47 Series A & B	Standards for large-diameter steel flanges (26” to 60”) commonly used in pressure vessels and pipelines.
ANSI / ASME B16.48	Specification for line blanks (spade and spacer) used with Inconel materials.
EN 1092-1 / EN 1759	European standards for flange dimensions and pressure-temperature ratings.
NACE MR0175 / ISO 15156	Compliance for use of Inconel Flanges in sour service environments (oil & gas).
PED 2014/68/EU	Pressure Equipment Directive certification for supplying Inconel flanges in Europe.
ISO 9001:2015	Quality management system certification ensuring consistent product quality.
Mill Test Certificate (MTC 3.1/3.2)	Provides chemical, mechanical, and heat treatment data with full traceability.
IBR Approval (if applicable)	Indian Boiler Regulation approval for flanges used in boiler applications.
TUV / DNV / Lloyd’s / SGS (on request)	Third-party inspection and certification for specific industrial or export requirements.

Applications & Industries of Inconel Flanges

The exceptional combination of high-temperature strength, outstanding corrosion resistance, and overall durability makes Solitaire Overseas' Inconel Flanges indispensable across a wide spectrum of the world's most challenging and technologically advanced industries. Their reliability under extreme conditions ensures operational safety, longevity, and efficiency.

Key Industries Reliant on Our Inconel Flanges:

Oil & Gas – Used in offshore rigs, sour gas environments, and subsea pipelines due to their NACE compliance and corrosion resistance.
Petrochemical & Refining – Ideal for heat exchangers, reactors, and high-pressure vessels exposed to corrosive fluids.
Aerospace & Defense – Preferred for jet engines, turbine systems, and exhaust components where temperature stability is critical.
Power Generation – Suitable for superheaters, boiler systems, and nuclear plants where performance at high temperatures is essential.
Marine & Shipbuilding – Trusted in seawater environments for their outstanding resistance to chloride-induced corrosion.
Pharmaceutical & Food Processing – Applied in hygienic, corrosion-sensitive systems that demand long-lasting reliability.
Chemical Processing – Resistant to acidic and oxidizing media, making them ideal for chemical reactors and piping systems.

The superior performance characteristics of Inconel Flanges supplied by Solitaire Overseas make them the trusted choice for ensuring safety, reliability, and extended service life in the most challenging and critical industrial operations around the globe.

Product Availability & Global Delivery of Inconel Flanges from Solitaire Overseas

At Solitaire Overseas, we take pride in offering a comprehensive range of Inconel flanges ready for prompt dispatch across the globe. Whether you need standard sizes or custom-forged solutions, our extensive inventory ensures minimal lead times and consistent availability.

We stock Inconel flanges in all major grades, including Inconel 600, 601, 625, 718, and 825, across a variety of flange types such as:

Weld Neck (WN)
Slip-On (SORF)
Blind (BLRF)
Socket Weld (SWRF)
Threaded (THRF)
Lap Joint (LJRF)
Long Weld Neck (LWN)

Global Delivery Capabilities:

Worldwide Shipping via air, sea, or land – with door-to-door logistics support
Custom Packaging to prevent corrosion and transit damage
Ready-to-Ship Inventory for urgent requirements
Export Compliance with international standards including ASTM, ASME, EN, DIN, and JIS
Documentation & Certifications including EN 10204 3.1/3.2, MTCs, and Third-Party Inspection reports

Whether your project site is in Europe, the Middle East, North America, Africa, or Asia, our supply chain network and export team ensure timely and secure delivery of Inconel flanges that meet your exact requirements.

What is the Price of Inconel Flanges in India?

The price of Inconel Flanges in India varies depending on several key factors, including the Inconel grade (e.g., 600, 625, 718, 825), flange type (Weld Neck, Blind, Slip-On, etc.), size, pressure class, and whether it's a standard item or custom-made. Due to the premium nature of Inconel alloys, which are known for their exceptional corrosion and heat resistance, these flanges typically cost more than standard stainless steel or carbon steel alternatives. As of 2025, Inconel Flange prices in India generally range between ₹1,500 to ₹12,000 per piece or more, depending on specifications. Bulk orders, custom machining, and special coatings can also influence the final cost. Below is an estimated price range table for different grades and types.

Estimated Price Range of Inconel Flanges in India (2025)

Inconel Grade	Flange Type	Size Range	Pressure Class	Estimated Price (INR/Piece)
Inconel 600	Weld Neck	1" – 4"	150# – 600#	₹1,800 – ₹4,500
Inconel 625	Blind Flange	½" – 6"	150# – 900#	₹2,200 – ₹6,500
Inconel 718	Slip-On Flange	1½" – 8"	150# – 2500#	₹3,500 – ₹9,500
Inconel 825	Socket Weld Flange	1" – 3"	150# – 600#	₹2,000 – ₹5,800
Inconel 625	Custom Machined	As per drawing/specs	Custom	₹6,000 – ₹12,000+

FAQs Of Inconel Flanges

What are the disadvantages of Inconel?

Inconel is expensive and challenging to machine due to its toughness and work-hardening properties. It also requires specialized welding techniques and tools, which can increase fabrication time and cost compared to other metals like stainless steel.

How much heat can Inconel handle?

Inconel can withstand extreme temperatures, typically up to 1,980°F (1,080°C), and even higher in certain alloys like Inconel 718 and 625. Its excellent heat resistance makes it ideal for high-temperature applications such as jet engines and exhaust systems.

What rod is used to weld Inconel?

Inconel is typically welded using Inconel filler rods such as ERNiCr-3 (for Inconel 600/601) or ERNiFeCr-2 (for Inconel 718). These specialized rods ensure strong welds with corrosion and heat resistance similar to the base material.

What are the benefits of Inconel?

Inconel offers exceptional strength at high temperatures, excellent oxidation and corrosion resistance, and long-term durability. It's ideal for harsh environments such as aerospace, marine, and chemical processing applications.

Is Inconel stronger than steel?

Yes, Inconel is generally stronger than most types of steel, especially at high temperatures. While carbon steel may have similar strength at room temperature, Inconel maintains its mechanical properties even in extreme heat and corrosive environments.