Inconel 625 Flanges – Alloy 625 / UNS N06625 Flanges Supplier

Kalpataru Piping is a trusted manufacturer, exporter, and supplier of Nickel Alloy Flanges, including Inconel 625 flanges. We designed Inconel 625 flanges (Alloy 625 / UNS N06625 / DIN 2.4856) in pressure classes of Class 150 to Class 2500 and PN 6 to PN 64 and in conformance with ASME B16.5, ASME B16.47 and ASTM B564 requirements. EN 10204 3.1 certification is already provided for all flanges, ensuring that the entire material’s traceability and uniformity are maintained within international norms. At Kalpataru Piping, our in-house modern production facility has the current tools and machinery to produce flanges in the correct dimensions and finish. These Inconel flanges are supplied in standard and custom designs, sizes, shapes, thicknesses & pressure ratings to suit the needs of the project. Alloy 625 flanges are constructed by using destructive and non-destructive tests according to international standards, & all the necessary test reports and certificates are supplied at the delivery time. We maintain huge stock of Inconel 625 flanges to supply to customers at competitive prices.

Introduction to Inconel 625 Flanges

Inconel 625 flanges have been prepared by high performance nickel, chromium, molybdenum and niobium alloy and besides being a good corrosion-resistant alloy, they are also high in mechanical strength. Inconel Alloy 625 has extremely high amounts of nickel and has the highest pitting, crevice corrosion, oxidation, and stress corrosion cracking resistance in the high temperature and hostile conditions. These flanges are high tensile, high fatigue and also easily weldable hence can be used in areas of high pressure and heat needs. The sizes of Inconel 625 flanges are in sizes which normally range between 1/2-inch to 60 inches depending on the nature of the flange. The pressure ratings are Class 150 – Class 2500, PN 6 – PN 64. Flanges are of different kinds and they comprise of slip-on flanges, weld neck flanges, blind flanges, threaded flanges, socket weld flanges, and RTJ flanges. All of them are supposed to be specific purpose like high pressure, high temperature or easy assembly and maintenance. 

Alloy 625 Flange Faces

Kalpataru Piping also provides options of Inconel Alloy 625 flanges that have various facing alternatives that provide dependability in sealing as well as compatibility with other piping systems:

• Lap Joint Face
• Flat Face (FF)
• Raised Face (RF)
• Ring Type Joint (RTJ)
• Small Male–Female
• Large Male–Female
• Small Tongue
• Large Tongue
• Groove

Both flange faces are produced with accuracy to ensure the tightness, leak-free operation, and durability in the intense working conditions.

What is the difference between Inconel 625 & Inconel 718?

The very simple and common difference between Inconel 625 Flanges and Inconel 718 Flanges is based on their chemical composition, the approach to strengthening, and their applications. To know more about both materials, read our detailed blog on Inconel 625 vs Inconel 718.

Inconel 625 Flanges Standrads & Specifications: ASTM B564 & ASME SB564

Manufacturing Standards of Inconel 625 Flanges Manufacturers in India

Inconel Alloy 625 Flanges Specification

Chemical Composition of Alloy 625 Flanges

Inconel 625 Flanges Mechanical Properties

Equivalent Material of Inconel 625 Flanges

Pressure classes of Inconel 625 Din 2.4856 Threaded Flanges

Physical Properties of Inconel 625 Flanges

Types of Inconel 625 Flanges

Inconel 625 flanges that are manufactured according to ASTM B564 / UNS N06625 are common in high-pressure and corrosive service. These flanges come in various designs and pressure classes in response to the various piping needs. The various types of flanges have certain functional benefits regarding the installation procedure, pressure capacity, and conditions of service.

Size Ranges & Dimension Standards for Inconel 625 Flanges

Gasket Size Of Inconel 625® Flanges

Alloy 625 Flange Pressure Rating

Nickel Alloy 625 Spectacle Blind Flanges Weight

Class 400 Inconel 625 DIN 2.4856 Pipe Flange Dimensions

Dimension of Nickel 625 Slip On Flange

Thread Types of DIN 2.4816 Threaded Flanges

•  NPT thread
•  MPT thread
•  MNPT thread (Male)
•  FPT thread
•  BSPT thread (Female)
•  BSP thread
•  FNPT thread (Female) – ASME B1.20.1
•  BSPP thread (Female & male)

Applications of Inconel Alloy 625 Flanges

Inconel 625 flanges are designed for the highest form of extreme conditions, hence they are unavoidable in industries where corrosion, heat, and pressure are neccesary factors. These flanges are well-known due to their operation in hostile conditions; they find extensive applications in various industries that are of high stakes:

• Oil & Gas: This material is best in sour gas pipelines, subsea manifolds, and offshore drilling systems where corrosiveness of hydrogen sulfide, high pressure, and salinity of seawater require unsurpassed material performance.
• Chemical Processing Plants: A common application in reactor vessels, acid-handling systems and heat exchangers where the ability to withstand nitric, phosphoric, and sulfuric acids is of paramount concern to both operational safety and life cycle.
• Power Generation: Due to their superb strength and oxidation resistance, Inconel 625 flanges are well-suited for superheated steam lines, turbine exhaust systems, and hot gas up to the highest temperatures of 982 °C.
• Marine and Offshore Structures: The alloy has high resistance to pitting, crevice corrosion, and chloride stress corrosion, which has made it suitable for seawater handling systems, desalination plants, and naval equipment.
• Aerospace & Defense: These flanges are trusted in aircraft engines, thermal shielding, and exhaust ducting, and have strength and structural stability during high-speed thermal cycling and high mechanical stress.
• Pharmaceutical & Food Industries: Inconel 625 flanges are preferred in high-purity fluid transfer systems, where internal finishes are smooth, clean, and resistant to corrosion, required in the sanitary grade.

Weight Chart Of Inconel 625 Flanges

Inconel 625 Flanges Tolerance

Manufacturing Process of Inconel 625 Flanges

The production of Inconel 625 flanges follows very well-organized and precise processes aiming at the high mechanical strength, resistance to corrosion, and precision of dimensions. All the stages are fabricated based on the global requirements such as ASTM B564 and ASME B16.5 / ASME B16.47.

1. Raw Material Inspection: It begins with the choice of high quality and certified Inconel Alloy 625 (UNS N06625) raw material. This is followed by testing to determine chemical composition and mechanical properties to check full conformity to specification requirements.
2. Cutting of Billets: The raw material is then binary sliced to billets or blanks by the use of precision cutting machines of the desired size. This promotes efficiency and reduces wastage of the material.
3. Heating: Then the billets are heated in a furnace with temperature control to make them a suitable material for forging. It is also necessary to uniformly heat the alloy to preserve its metallurgical properties.
4. Forging: The billets are heated and set in hydraulic presses or forging hammers to be shaped by heating into the desired flange shape. The process enhances refinement of grain structure, strength and fatigue resistance.
5. Heat Treatment: The flanges are solution annealed after forging, then controlled cooled. Heat treatment eliminates internal stresses, enhances ductility and restores corrosion.
6. Machining: CNC machining is used in order to produce accurate dimensions, bolt holes, bore sizes, facing types and surface finishes. This is to make sure that all tolerances are met to standard and to customer levels.
7. Surface Finishing: To clean and finish flanges, grinding, polishing or shot blasting of flanges is done to remove the scale and get a smooth surface.

Applications of Inconel 625 Flanges

Inconel 625 flanges are widely used in industries that require excellent corrosion resistance, high strength, and reliable performance under extreme temperatures and pressures. Due to their nickel-chromium-molybdenum composition with niobium, these flanges perform exceptionally well in aggressive and demanding environments.

Common applications include:

• Oil & Gas Industry – Used in offshore platforms, pipelines, subsea systems, and refineries due to resistance to seawater, sour gas, and high pressure
• Petrochemical Industry – Suitable for reactors, pressure vessels, and piping systems exposed to corrosive chemicals
• Chemical Processing Plants – Ideal for handling acids, alkalis, and chloride-rich media
• Power Generation – Used in boilers, heat exchangers, condensers, and nuclear power systems
• Marine & Offshore Applications – Excellent resistance to saltwater corrosion and stress corrosion cracking
• Aerospace Industry – Used in high-temperature and high-stress structural and fluid-handling components
• Pharmaceutical & Food Processing – Applied where corrosion resistance, cleanliness, and reliability are critical
• Pulp & Paper Industry – Suitable for equipment exposed to corrosive pulping chemicals
• Heat Exchangers & Condensers – Preferred for long service life under thermal cycling conditions

Price List of Inconel 625 Flanges

The price of the Inconel 625 Flanges depends on various things that include technical and commercial factors. Inconel is a high-nickel alloy that makes it a little bit costly and also increases the manufacturing complexity. 

Testing & Documentation Certificates

To maintain the consistent quality, safety, and compliance with the international standards, all the Inconel 625 flanges go through the strict testing and inspection procedure at all levels of production. Each of our products is supplied with the proper documentation to guarantee full traceability and reliability for the customers. 

Testing Procedures

All our inconel 625 flanges are tested to the international standard such as our ASTM B564, ASME B16.5 and ASME B16.47 standards.

• Chemical Composition Test
• Confirms alloy chemistry as per UNS N06625 specifications.
• Mechanical Testing
• Positive Material Identification (PMI)
• Verifies the material grade using spectrometric analysis.
• Non-Destructive Testing (NDT)

Documentation & Certification

Each shipment of Inconel 625 flanges is supplied with complete and verifiable documentation, including:

• Mill Test Certificate (MTC) as per EN 10204 3.1
• Chemical Analysis Report
• Mechanical Test Report
• Non-Destructive Test Reports (UT / RT / DPT / PMI)

All documents are available at delivery time and the full traceability of raw material to the finished product is ensured and total compliance to customer and project requirements.

Cities We deliver:

Bhopal, Lahore, Milan, Hyderabad, Pune, Vadodara, Pimpri-Chinchwad, Aberdeen, Howrah, Jeddah, Riyadh, Bogota, Petaling Jaya, Dallas, Lagos, Nagpur, Houston, Brisbane, Busan, Karachi, Coimbatore, Seoul, Caracas, Atyrau, Perth, Haryana, Bengaluru, Jaipur, Al Jubail, Kuwait City, Al Khobar, Sydney, Ranchi, Chiyoda, Noida, Chandigarh, Secunderabad, Ahvaz, Port-of-Spain, Singapore, Gurgaon, Rajkot, Rio de Janeiro, Abu Dhabi, Hong Kong, Surat, Sharjah, Hanoi, London, Muscat, Jakarta, Navi Mumbai, Istanbul, Kolkata, Cairo, Mumbai, Santiago, Montreal, Faridabad, Vung Tau, Bangkok, Ankara, Ahmedabad, Granada, Melbourne, Tehran, Visakhapatnam, New Delhi, Los Angeles, Ho Chi Minh City, Edmonton, La Victoria, Baroda, Thane, Nashik, Kuala Lumpur, Moscow, Ernakulam, Courbevoie, Calgary, Geoje-si, Indore, New York, Mexico City, Gimhae-si, Ludhiana, Kanpur, Ulsan, Thiruvananthapuram, Manama, Doha, Chennai, Madrid, Jamshedpur, Algiers, Dammam

Countries We Deliver:

Iran, Venezuela, Saudi Arabia, Slovakia, Romania, Zimbabwe, Spain, Kazakhstan, Canada, Nigeria, Bulgaria, Afghanistan, Thailand, Bangladesh, Poland, United Kingdom, Bahrain, Jordan, Lithuania, Malaysia, France, Nigeria, Japan, Oman, Lebanon, Germany, Croatia, Australia, Puerto Rico, South Korea, Hungary, United States, Bhutan, Mexico, Mexico, Yemen, Singapore, New Zealand, Ecuador, Gabon, Qatar, Denmark, Iran, Netherlands, Norway, Sri Lanka, Belgium, Libya, Kuwait, Pakistan, Gambia, Sweden, Azerbaijan, Argentina, Chile, Ghana, United Arab Emirates, Finland, Nepal, Trinidad andamp; Tobago,Tunisia, Kenya, Peru, Austria, Russia, Ukraine, Italy, Belarus, Bolivia, Serbia, Poland, Mongolia, Turkey, Czech Republic, South Africa, Angola, India, Vietnam, Indonesia, Tibet, Ireland, Costa Rica, Greece, Colombia, Namibia, Iraq, Estonia, Israel, Macau, Philippines, Brazil, Switzerland, Algeria, Morocco, Chile, Portugal, Egypt, Taiwan, China, Hong Kong.