UNS N06625 (Inconel® 625) lapped joint flanges from Synergy Engineering Solution are engineered for the most demanding corrosive and high-temperature environments. Inconel 625 is a nickel-chromium-molybdenum-niobium alloy known for its exceptional combination of high strength, outstanding resistance to pitting and crevice corrosion, and excellent oxidation and carburization resistance at elevated temperatures. The lapped-joint configuration (stub end + loose backing flange) paired with Inconel 625’s corrosion resistance makes these flanges ideal where the pipe bore must be protected from aggressive media while allowing easy rotation and alignment of the backing flange during installation or maintenance.
As a manufacturer, stockist and exporter, Synergy Engineering Solution provides Inconel 625 lapped joint flanges in a wide range of sizes and pressure classes (ANSI/ASME Classes 150–1500 and custom requirements), and with common flange face finishes such as Raised Face (RF), Ring Type Joint (RTJ) and Flat Face. Synergy’s in-house capabilities include precision forging/machining, CNC finishing, bore and face machining, and packing of both stub ends and backing flanges so customers receive ready-to-install assemblies. Maintaining stock inventories helps Synergy serve last-minute maintenance, turnaround, and project needs while also supporting large orders and long-term supply agreements.
Performance-wise, Inconel 625 delivers superior mechanical strength across a wide temperature range and excellent resistance to localized corrosion in chloride-bearing media, making it a common choice where stainless steels would suffer pitting, crevice attack, or stress-corrosion cracking. The alloy’s chemistry (high Ni and Cr with significant Mo and Nb) provides elevated creep- and rupture-strength, good fatigue resistance, and reliable weldability — all important for flanges used in pressure-retaining piping and equipment. These properties make Inconel 625 flanges particularly valuable for applications combining corrosive service with cyclic loading or elevated temperatures.
Synergy supplies Inconel 625 lapped joint flanges into a broad range of industries and geographies: oil & gas and petrochemical processing, desalination and seawater systems, chemical processing, power generation (including turbine and heat-treatment systems), marine and offshore platforms, and specialized process plants in aerospace and nuclear supply chains. Their export footprint includes Oman, Qatar, Saudi Arabia, UAE, Kuwait in the Middle East; Spain and Germany in Europe; the USA and Canada in North America; multiple countries across Africa; and other international markets. For each shipment Synergy coordinates logistics, export documentation and customs clearance to ensure timely delivery.
Quality assurance and traceability are central to Synergy’s offering. Each flange is supplied with full material traceability and certification (mill test certificates such as EN 10204/3.1 on request), dimensional inspection reports, and non-destructive examination results when required (PMI, ultrasonic, dye penetrant, hydrostatic testing, etc.). For critical projects Synergy can arrange third-party inspection and testing, customized packaging for long-distance sea or air freight, and compliance documentation tailored to client and country regulations.
Whether you need single prototype stub ends with backing flanges, stocked inventory for maintenance turnarounds, or long-term procurement for multi-site projects, Synergy positions itself as a turnkey partner for UNS N06625 Inconel 625 lapped joint flanges. If you want, I can now convert this into an SEO-friendly product page intro, a printable technical datasheet in HTML (with chemical composition, mechanical properties, equivalents and FAQs), or a ready-to-use quotation template
| Property | Specification / Value | Notes |
|---|---|---|
| Material | Inconel 625 (UNS N06625) | Nickel-Chromium-Molybdenum-Niobium Alloy |
| Product | Lapped Joint Flanges (Stub End + Backing Flange) | Easy alignment and disassembly |
| Sizes | 1/2” to 48” (Custom Available) | ANSI/ASME standards |
| Pressure Ratings | Class 150, 300, 600, 900, 1500 | ASME/ANSI B16.5, B16.47 |
| Facing Options | RF, RTJ, Flat Face | Custom surface finishes available |
| Standards | ASME B16.5, B16.47, MSS-SP-44 | Other international standards on request |
| Element | Specification % |
|---|---|
| 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 |
| Carbon (C) | 0.10 max |
| Manganese (Mn) | 0.50 max |
| Silicon (Si) | 0.50 max |
| Phosphorus (P) | 0.015 max |
| Sulfur (S) | 0.015 max |
| Aluminum (Al) | 0.40 max |
| Titanium (Ti) | 0.40 max |
| Cobalt (Co) | 1.0 max |
| Property | Value |
|---|---|
| Tensile Strength | 827 MPa (120,000 psi) |
| Yield Strength (0.2% offset) | 414 MPa (60,000 psi) |
| Elongation (in 2”) | 30% |
| Hardness | ≤ 95 HRB |
| Density | 8.44 g/cm³ |
| Melting Range | 1290 – 1350 °C |
| Standard | Equivalent Grade |
|---|---|
| UNS | N06625 |
| Werkstoff Nr. | 2.4856 |
| EN | NiCr22Mo9Nb |
| ISO | Alloy 625 |
| Trade Name | Inconel 625 |
They provide outstanding corrosion resistance, high mechanical strength, and excellent performance in both oxidizing and reducing environments, making them suitable for seawater, chemical processing, and high-temperature applications.
The lapped joint design allows for easy alignment and disassembly of pipe systems, reducing maintenance costs and improving installation flexibility.
They are widely used in offshore oil & gas, desalination plants, petrochemical processing, power generation, marine engineering, and aerospace applications.
Yes, flanges are supplied with Mill Test Certificates (EN 10204/3.1), dimensional accuracy reports, and third-party inspection certifications upon request.
In order to alter the physical and mechanical characteristics of metal without altering its original shape and size, we offer a variety of heat treatment services, including hydrogen heat treatment, HIC testing, blasting and painting, cutting, arc welding, epoxy cutting, PMI testing, hydro testing, NACE testing, and SSC testing. Although heat treatment is frequently linked to a metal's increased strength, it can also be used to change specific manufacturability goals, such enhancing machinability, formability, ductility, etc. The metal and heavy manufacturing sectors use our services. Customers have expressed great pleasure with our services' precision, efficacy, cost, and prompt delivery.
Exporting Steel Pipes & Tubes to over 60 countries including Afghanistan, Albania, Andorra, Angloa, Austria, Australia, Bahrain, Bangladesh, Bhutan, Brazil, Brunei, Belarus, Belgium, Bulgaria, Cambodia, China, Cyprus, Croatia, Czech Republic, Canada, Denmark, Estonia, Egypt, Finland, France, Germany, Greece, Georgia, Hungary, Iceland, Ireland, Italy, Indonesia, Iran, Iraq, Israel, Japan, Jordan, Kazakhstan, Kuwait, Kyrgyzstan, Lebanon, Latvia, Latin America, Liechtenstein, Lithuania, Luxembourg, Malta, Madagascar, Mexico, Moldova, Monaco, Malaysia, Maldives, Mongolia, Myanmar (Burma), Nepal, New Zealand, North Korea, Netherlands, Norway, Nigeria, Oman, Poland, Portugal, Pakistan, Palestine, Philippines, Qatar, Russia, Romania, Russia, San Marino, Serbia and Montenegro, Slovakia, Slovenia, Spain, Sweden, Switzerland, Saudi Arabia, Singapore, South Korea, South Africa, Sri Lanka, Sudan, Syria, Taiwan, Tanzania, Tajikistan, Thailand, Turkey, Turkmenistan, Ukraine, United Kingdom, United Arab Emirates (UAE), Uzbekistan, Venezuela, Vietnam, Yemen, etc.

