Inconel 625 Tube Fittings – UNS N06625 Compression and Ferrule Fittings Supplier

Alloy 625 Compression Tube Fittings and Ferrule Fittings manufacturer, ASTM B366, ASME SB366 certified. Stocking UNS N06625 instrumentation fittings, hydraulic fittings, and tube adapters for critical high-pressure piping applications worldwide.

Kalpataru Piping Solutions has been supplying certified nickel alloy piping components to EPC contractors and OEMs across 40+ countries since [year]. ISO 9001:2015 certified. We maintain a large ready stock of ASME SB366 Inconel 625 tube fittings, including compression tube fittings, ferrule fittings, instrumentation fittings, and hydraulic fittings designed for critical high-pressure piping applications. Our Inconel 625 pipe fittings are manufactured from high-quality UNS N06625 material (DIN 2.4856, Werkstoff Nr. 2.4856) and conform to ASTM B366 and ASME SB366 specifications. You can browse our full range of compression tube fittings across all alloy grades to compare material options for your specific project requirements.

Looking for a cost-effective alternative to Swagelok or Parker A-lok Inconel 625 fittings? Kalpataru Piping Solutions supplies fully interchangeable UNS N06625 compression tube fittings that meet the same dimensional and pressure standards, at competitive ex-Mumbai pricing with shorter lead times. Contact us for a direct comparison and quotation.

Inconel 625 Tube Fittings Types

Kalpataru Piping Solutions stocks a comprehensive range of Alloy 625 tube fitting configurations to meet diverse industrial requirements. All fittings are manufactured from UNS N06625 material with full EN 10204 3.1 material test certificates as standard.

Inconel 625 Compression Tube Fittings

Inconel 625 compression tube fittings provide a reliable, leak-free connection for high-pressure instrumentation and process lines. Our Alloy 625 compression fittings are available in sizes from 3 mm to 25 mm OD and are manufactured in accordance with ASTM B564 / ASME SB564 for UNS N06625 material. These fittings are compatible with standard tube OD tolerances and are widely used in oil and gas instrumentation, subsea control systems, and high-temperature process lines.

Inconel 625 Ferrule Fittings – Single and Double Ferrule

Kalpataru Inconel 625 tube fittings are available in single and double ferrule configurations. Each double ferrule fitting consists of a front ferrule for grip and a back ferrule for sealing, providing a reliable, vibration-resistant connection suitable for offshore and subsea environments. Our Alloy 625 double ferrule fittings conform to ASTM B564 and are compatible with Swagelok and Parker A-lok ferrule dimensions. Inconel 625 ferrule fittings are preferred for applications where tube pull-out resistance and gas-tight sealing under thermal cycling are critical design requirements.

Available Inconel 625 Ferrule Fitting Types:

•       Inconel 625 Double Ferrule Tube Fittings (two-piece front and back ferrule design)
•       Inconel 625 Single Ferrule Tube Fittings
•       Inconel 625 Front Ferrule Fittings
•       Inconel 625 Back Ferrule Fittings
•       Alloy 625 Instrumentation Tube Fittings (compatible with Swagelok and Parker A-lok dimensions)

Inconel 625 Instrumentation Fittings

Inconel 625 instrumentation fittings are engineered for precision measurement and control lines in corrosive and high-temperature environments. These UNS N06625 instrumentation fittings are specified extensively in refinery analyzer systems, subsea chemical injection lines, and offshore platform instrumentation manifolds. Available in tube sizes from 3 mm to 25 mm OD, they are compatible with most standard instrument tubing specifications and pressure ratings up to 10,000 psi.

Inconel 625 Hydraulic Fittings

Inconel 625 hydraulic fittings are rated for operating pressures up to 10,000 psi and are suitable for offshore hydraulic control lines, high-pressure test rigs, and subsea umbilical systems. Our Alloy 625 hydraulic fittings are available in NPT, BSPT, and BSPP thread configurations to suit US, European, and Middle Eastern project requirements. The non-magnetic and corrosion-resistant nature of UNS N06625 makes these hydraulic fittings the preferred choice for deepwater and sour service applications where standard stainless steel fittings fail prematurely.

Other Inconel 625 Tube Fitting Configurations:

•       Inconel 625 Union Tube Fittings
•       Inconel 625 Elbow Tube Fittings (90 degree and 45 degree)
•       Inconel 625 Tee Tube Fittings (Union Tee, Run Tee, Branch Tee)
•       Inconel 625 Cross Tube Fittings
•       Inconel 625 Reducer Tube Fittings
•       Inconel 625 Bulkhead Tube Fittings
•       Inconel 625 Tube Adapters (Tube to Male and Tube to Female)
•       Inconel 625 Port Connectors
•       Inconel 625 Plug and Cap Fittings
•       Inconel 625 Valve Tube Fittings

Inconel 625 Tube Fittings Available Stock and Pricing

Check Inconel 625 Tube Fittings Price

The price of Inconel 625 tube fittings varies based on size, fitting type, pressure rating, and order quantity. Prices are subject to LME nickel rates at the time of order. Lead time: 2 to 4 weeks for standard sizes from ready stock; 6 to 10 weeks for custom specifications. Minimum order quantity applies for non-standard configurations. Export prices are available in USD, EUR, and AED on request.

Prices shown are indicative INR ex-works Mumbai. For export orders, contact our sales team for USD/EUR pricing and freight terms. All prices subject to revision based on current LME nickel rates.

Available Types of Inconel Alloy 625 Compression Tube Fittings

Ready Stock of Inconel 625 (UNS N06625) Socket Buttweld Pipe Fittings

Inconel 625 Ferrule and Instrumentation Fittings

Inconel 625 ferrule fittings and instrumentation fittings represent the most critical category in our UNS N06625 tube fitting range. These fittings are engineered for applications where zero-leakage performance, resistance to vibration, and long-term reliability under thermal cycling are non-negotiable requirements.

Our Alloy 625 instrumentation fittings are manufactured to ASTM B564 UNS N06625 forging standards and are available with dual-ferrule tube gripping systems for maximum pull-out resistance. The front ferrule bites into the tube to create a mechanical grip, while the back ferrule swages to form a gas-tight pressure seal. This two-stage action makes Inconel 625 double ferrule fittings the preferred specification for subsea, offshore, and refinery instrumentation applications.

Key Features of Inconel 625 Ferrule and Instrumentation Fittings:

• Compatible with Swagelok and Parker A-lok ferrule dimensions for direct interchangeability
• Rated for pressures up to 10,000 psi in standard configurations
• Operating temperature range from cryogenic service to 1,093 degrees Celsius
• Non-magnetic with a permeability of 1.0006 at 15.9 kA/m, suitable for magnetically sensitive environments
• Available with NPT, BSPT, and BSPP male and female thread ends
• Full EN 10204 3.1 material test certificates supplied as standard

Alloy 625 Compression Fittings – Material Properties and Standards

Inconel 625 (UNS N06625 / DIN 2.4856 / Werkstoff Nr. 2.4856) is a nickel-chromium-molybdenum alloy with niobium additions that provide exceptional corrosion resistance, high tensile strength, and outstanding fatigue resistance across a wide temperature range. These properties make it the alloy of choice for tube fittings used in offshore oil and gas, chemical processing, marine, aerospace, and nuclear applications.

Inconel 625 Chemical Composition – UNS N06625 / ASTM B443

Inconel 625 Mechanical Properties – Annealed Condition

Inconel 625 Physical Properties

 Inconel 625 Operating Temperature Range

 Creep and Rupture Strength of Inconel 625:

Inconel 625 exhibits excellent creep and rupture strength at elevated temperatures, maintaining structural integrity well above the limits of austenitic stainless steels. This makes it the preferred choice for high-temperature piping systems in power generation and petrochemical applications where sustained loading at operating temperature is a critical design factor. The alloy retains approximately 75% of its room-temperature tensile strength at 650 degrees Celsius, significantly outperforming 316L stainless steel under equivalent conditions.

UNS N06625 Fittings Standards and Specifications

All Inconel 625 tube fittings supplied by Kalpataru Piping Solutions conform to the following international standards and specifications. Material test certificates are available as per EN 10204 3.1 from NABL accredited laboratories.

These fittings are designed for use with Inconel 625 pipes and tubes certified to ASTM B444. For buttweld end configurations, refer to our Inconel 625 forged fittings range and Inconel 625 pipe fittings supplier page for full dimensional and pressure rating details.

Inconel 625 Tube Fittings Applications

UNS N06625 tube fittings are selected for the most demanding corrosion and high-temperature service environments. The following key industry applications reflect where Inconel 625 compression tube fittings, ferrule fittings, and instrumentation fittings are specified by engineers and procurement teams worldwide.

• Oil and Gas Production: Used in wellhead instrumentation, chemical injection lines, and subsea umbilical systems where chloride stress corrosion cracking resistance is mandatory.
• Offshore and Subsea: Inconel 625 hydraulic fittings and instrumentation fittings are standard in subsea control systems and riser piping due to their resistance to seawater corrosion and pitting.
• Petrochemical and Refinery: Alloy 625 compression tube fittings are used in high-pressure process lines, heat exchangers, and analyzer sample systems handling sour gas, acids, and chloride-containing process streams.
• Aerospace and Defense: Inconel 625 ferrule fittings are used in aircraft fuel systems and hydraulic lines where lightweight, high-strength, corrosion-resistant fittings are required at elevated temperatures.
• Power Generation: UNS N06625 instrumentation fittings are used in supercritical steam lines, boiler tube connections, and flue gas desulfurization (FGD) systems where creep resistance is a critical design factor.
• Chemical Processing: Alloy 625 tube fittings resist attack from a wide range of mineral acids, organic acids, and alkaline solutions used in chemical manufacturing processes.
• Marine and Shipbuilding: Inconel 625 compression fittings are used in seawater piping, desalination plants, and marine propulsion systems.
• Nuclear Industry: Inconel 625 tube fittings are used in nuclear plant coolant and instrumentation lines due to their non-magnetic nature (permeability 1.0006 at 15.9 kA/m), excellent radiation resistance, and conformance to ASME BPVC Section III requirements.
• High-Temperature Furnace and Heat Treatment: Inconel 625 fittings maintain structural integrity in continuous high-temperature service where standard alloys experience creep and oxidation failure.
• Pharmaceutical and Biotechnology: High-purity Inconel 625 tube fittings are used in sterile process lines and high-purity water systems where contamination prevention is critical.

How to Select Inconel 625 Tube Fittings

Selecting the correct Inconel 625 tube fitting for your application requires careful evaluation of several engineering and commercial factors. The following guide assists procurement engineers and project managers in making the right specification decision.

1. Pressure Rating: Select fittings rated for your system’s maximum allowable working pressure. Our Inconel 625 tube fitting range covers 3,000 to 10,000 psi depending on fitting type and tube OD. Hydraulic and high-pressure instrumentation fittings rated to 10,000 psi are available from stock.
2. Temperature Range: Confirm your operating temperature against the alloy’s usable range. Inconel 625 is suitable from cryogenic service (minus 196 degrees Celsius) up to 1,093 degrees Celsius for intermittent high-temperature applications. For continuous elevated temperature service above 650 degrees Celsius, confirm creep and oxidation requirements with our technical team.
3. Thread Standard: Specify NPT threads for US and Canadian systems, BSPT for UK and Middle Eastern projects, and BSPP for European instrumentation systems. We stock all three thread forms in Inconel 625 tube fittings.
4. Ferrule Configuration: For vibration-prone or high-cycle applications, specify double ferrule fittings for superior grip and sealing. Single ferrule fittings are suitable for static or low-vibration service.
5. Compliance: Confirm ASTM B366 / ASME SB366 compliance and request EN 10204 3.1 material test certificates before ordering. For nuclear and pressure vessel service, ASME BPVC Section III compliance documentation is available on request.
6. Interchangeability: If replacing existing Swagelok or Parker A-lok fittings, confirm tube OD and ferrule dimensions to ensure full dimensional interchangeability. Our fittings are manufactured to match standard ferrule dimensions for direct replacement without rework.

Welding of Inconel 625 Tube Fittings

Where welded connections are required for Inconel 625 tube fittings or associated piping, the following welding recommendations apply to maintain the full corrosion resistance and mechanical properties of UNS N06625 material.

• Recommended Welding Process: TIG (GTAW – Gas Tungsten Arc Welding) is the best recommended process for welding Inconel 625 tube fittings, ensuring precision, low heat input, and minimal distortion.
• Filler Wire Specification: ERNiCrMo-3 (AWS A5.14) filler wire is recommended for welding UNS N06625 fittings. This filler wire matches the base metal composition and ensures equivalent corrosion resistance in the weld zone.
• Interpass Temperature Limit: Interpass temperature should not exceed 177 degrees Celsius (350 degrees Fahrenheit) during multi-pass welding to prevent sensitization and preserve corrosion resistance.
• Post-Weld Heat Treatment (PWHT): For most applications, Inconel 625 does not require PWHT. Where PWHT is specified by the design code, solution annealing at 1,150 degrees Celsius followed by rapid cooling may be required.
• Joint Preparation: Mechanically clean all joint surfaces to remove surface oxides, cutting fluids, and contamination before welding. Use dedicated Inconel-grade grinding wheels and wire brushes to prevent iron contamination.
• Shielding Gas: Use 100% argon or argon/helium mixtures for both shielding and purge gas to prevent oxidation of the weld root in tube applications 

Testing and Quality Assurance for Inconel 625 Tube Fittings

All Inconel 625 tube fittings supplied by Kalpataru Piping Solutions undergo comprehensive testing and quality inspection before dispatch. Our quality management system is ISO 9001:2015 certified. Third-party inspection by TPI agencies is available on request.

Standard Tests and Inspections:

• Chemical Analysis: Optical Emission Spectrometry (OES) and X-Ray Fluorescence (XRF) for composition verification to ASTM B443 UNS N06625 limits.
• Positive Material Identification (PMI): 100% PMI testing available for all Inconel 625 fittings to confirm alloy grade before dispatch.
• Mechanical Testing: Tensile, yield, elongation, and hardness testing to ASTM B564 requirements from NABL accredited laboratories.
• Hydrostatic Pressure Testing: Pressure testing to 1.5 times the rated working pressure for each fitting type.
• Intergranular Corrosion Test (IGC): ASTM A262 Practice E (Strauss Test) available for critical corrosion service applications.
• Hydrogen Induced Cracking (HIC) Test: Available for fittings intended for sour gas (H2S) service per NACE TM0284.
• Radiographic Testing (RT) and Ultrasonic Testing (UT): Available for socket weld and buttweld fittings per ASME Section V requirements.
• Dye Penetrant Testing (DPT) and Magnetic Particle Testing (MPT): Surface inspection per ASTM E165 and ASTM E709.
• Dimensional Inspection: Full dimensional verification to ASME B16.11 / B16.9 per applicable standard.
• Pitting and Crevice Corrosion Testing: Available per ASTM G48 Method A and B for marine and chloride service applications.

Documentation Available:

• EN 10204 3.1 Material Test Certificate from NABL accredited laboratory
• EN 10204 3.2 Third-party Inspection Certificate on request
• Country of Origin Certificate (CoO)
• Raw Material Traceability Records (Heat Number, Lot Number, Cast Number)
• Compliance Certificate to ASTM B366 / ASME SB366
• NACE MR0175 / ISO 15156 compliance documentation for sour service
• Radiography and Hydrostatic Test Reports
• Dimensional Inspection Reports 

Export and Packaging

We export Inconel 625 tube fittings to over 60 countries including UAE, Saudi Arabia, the UK, USA, Canada, Germany, Australia, Singapore, and South Africa. All fittings are packaged with alloy-grade end caps and wooden crates for sea freight shipments. Each fitting is marked with size, heat number, alloy grade, and our trademark for full traceability from our facility to your project site. Air freight options are available for urgent requirements from our ready-stock inventory.

Other Types of Inconel 625 Pipe Fittings and Related Products

In addition to our Inconel 625 tube fitting range, Kalpataru Piping Solutions supplies a complete portfolio of UNS N06625 piping components. Please visit the relevant product pages below for full specifications, dimensions, and pricing.

• Inconel Compression Tube Fittings (All Grades)
• Inconel 625 Pipe Fittings Supplier and Exporters
• Inconel 625 Forged Fittings Supplier and Exporters
• Inconel 625 Pipes and Tubes Supplier and Exporters

Inconel 625 Tube Fittings Types

Other Types of Inconel 625 Tube Fittings