Synergy Engineering Solution is a leading manufacturer, stockist and worldwide exporter of UNS N04400 Monel 400 Lapped Joint Flanges for industrial, engineering, marine, chemical processing, oil and gas, petrochemical, desalination and other demanding applications. We supply specialty alloy flange products to customers in India and international markets, with a strong focus on the Middle East and GCC region.
UNS N04400 Monel 400 Lapped Joint Flanges combine the corrosion-resistant characteristics of Monel 400 with the installation advantages of a lapped joint flange configuration. Monel 400 is a nickel-copper alloy identified by UNS N04400 and is recognized for its useful resistance to seawater, marine environments and several chemical conditions.
Our products are intended for customers requiring reliable specialty alloy piping components according to applicable dimensions, pressure classes, material specifications and project requirements. Synergy Engineering Solution supports distributors, stockists, EPC contractors, fabricators, engineering companies and industrial end users.
With our worldwide export focus, we support enquiries from the United Arab Emirates, Saudi Arabia, Qatar, Oman, Kuwait and Bahrain, as well as customers throughout Asia, Europe, Africa and other international markets.
UNS N04400 Monel 400 Lapped Joint Flanges, also called Monel 400 Lap Joint Flanges or Loose Flanges, are flange components used with a compatible stub end in a lapped joint piping connection. The loose flange is positioned behind the stub end and can rotate around it.
This rotational feature can make bolt-hole alignment easier during piping installation. It can also be beneficial for piping systems where regular dismantling, inspection, cleaning or maintenance is required.
A lapped joint connection normally consists of a pipe, a suitable stub end, a loose backing flange, gasket and bolting. The stub end is connected to the pipe, while the loose flange provides the bolting interface to the mating flange.
The exact material combination and flange design should be selected according to the project piping specification, pressure-temperature requirements, process fluid, corrosion conditions and applicable engineering standards.
Synergy’s presence in Middle Eastern markets (Oman, Qatar, Saudi Arabia, UAE, Kuwait) enables local or near-region supply of Monel 400 lapped joint flanges, reducing transit time and costs for clients in oil & gas, petrochemical, desalination, and marine sectors. In European markets (Spain, Germany) and North America (USA, Canada), Synergy competes by offering certified quality, flexibility of export packaging, and full documentation support. In Africa and worldwide, Synergy aims to address the gap in specialty alloy supply by delivering Monel 400 flanges even to remote or underserved regions, enabling customers to access high-performance nickel-copper alloy components with reliability and traceability.
clients in desalination plants, offshore and marine structures, chemical and hydrocarbon processing units, and seawater cooling systems find Monel 400 lapped joint flanges an excellent fit for long-term corrosion protection, maintenance ease, and installation versatility. Synergy supports these users with technical guidance on flange selection, matching with gasket and bolt materials, and supply chain reliability. As a global supplier, Synergy Engineering Solution positions itself not just as a vendor but as a technical partner for clients seeking robust, corrosion-resistant Monel 400 lapped joint flanges with dependable delivery across many continents.
| Standard | ASME B16.5, ANSI B16.47, MSS SP-44, DIN, EN, BS, GOST, JIS |
|---|---|
| Size Range | ½” to 48” (DN15 to DN1200) |
| Pressure Class | 150#, 300#, 600#, 900#, 1500#, 2500# |
| Facing | RF (Raised Face), FF (Flat Face), RTJ (Ring Type Joint) |
| Form | Lapped Joint Flanges |
| Material Grade | UNS N04400 / Monel 400 |
| Element | Content (%) |
|---|---|
| Nickel (Ni) | 63.0 min |
| Copper (Cu) | 28.0 – 34.0 |
| Iron (Fe) | 2.5 max |
| Manganese (Mn) | 2.0 max |
| Carbon (C) | 0.30 max |
| Silicon (Si) | 0.50 max |
| Sulfur (S) | 0.024 max |
| Property | Value |
|---|---|
| Tensile Strength | 550 MPa (min) |
| Yield Strength (0.2% Offset) | 240 MPa (min) |
| Elongation | 35% (min) |
| Hardness | HRB 65 (max) |
| Standard | Equivalent Grade |
|---|---|
| UNS | N04400 |
| W.Nr. | 2.4360 / 2.4361 |
| Alloy Name | Monel 400 |
| BS | NA 13 |
| JIS | NCu28 |
Monel 400 flanges provide excellent resistance to seawater, acids, and alkalis, along with good mechanical strength and toughness at a wide temperature range.
They are widely used in marine engineering, oil & gas, desalination plants, chemical processing, and hydrocarbon industries due to their corrosion resistance.
Lapped joint flanges allow easy alignment during installation, making them suitable for systems that require frequent dismantling and maintenance.
Yes, Synergy Engineering Solution exports Monel 400 lapped joint flanges to Oman, Qatar, Saudi Arabia, UAE, Kuwait, Spain, Germany, USA, Canada, Africa, and across the world.
Monel 400 is a nickel-copper alloy designated as UNS N04400. The alloy is known for its combination of corrosion resistance, mechanical strength and toughness. It is widely considered for applications involving seawater and marine environments and for selected chemical processing services.
Monel 400 is particularly valued where a nickel-copper alloy is required for suitable corrosive service. Its performance is dependent on the specific process conditions, including temperature, pressure, chemical concentration and fluid velocity.
For this reason, selecting the correct material and flange configuration requires consideration of the complete operating environment. Synergy Engineering Solution can support customers with product information required for procurement and project enquiries.
Monel 400 Lapped Joint Flanges are selected for applications where the properties of a nickel-copper alloy and the flexibility of a loose flange connection are beneficial.
One of the main advantages of a lapped joint flange is its ability to rotate around the stub end. This can make the alignment of bolt holes easier compared with fixed flange arrangements, particularly during installation and maintenance.
The Monel 400 alloy provides corrosion resistance and mechanical properties that can be useful in appropriate marine, seawater and chemical environments. When properly selected for the service conditions, these characteristics make UNS N04400 a valuable material for specialty piping components.
Monel 400 is primarily a nickel-copper alloy. Nickel and copper form the principal constituents, while iron, manganese, carbon, silicon and sulfur are controlled within specified limits. The following values are commonly associated with UNS N04400 material specifications.
| Element | Specified / Maximum Value |
|---|---|
| Nickel (Ni) | 63.0% minimum |
| Copper (Cu) | 28.0% – 34.0% |
| Iron (Fe) | 2.5% maximum |
| Manganese (Mn) | 2.0% maximum |
| Carbon (C) | 0.30% maximum |
| Silicon (Si) | 0.50% maximum |
| Sulfur (S) | 0.024% maximum |
The exact chemical requirements should always be verified against the applicable material specification and the certification supplied with the particular order.
Synergy Engineering Solution supplies Monel 400 Lapped Joint Flanges according to customer requirements and applicable standards. For forged Monel 400 flanges, ASTM B564 / ASME SB564 is a commonly referenced material specification, while ASME B16.5 is commonly used for dimensional requirements of applicable flanges. :contentReference[oaicite:0]{index=0}
| Specification | Details |
|---|---|
| Product | UNS N04400 Monel 400 Lapped Joint Flanges |
| Material | Monel 400 / Nickel-Copper Alloy |
| UNS Number | N04400 |
| Werkstoff Number | 2.4360 |
| Flange Type | Lapped Joint / Lap Joint / Loose Flange |
| Material Standard | ASTM B564 / ASME SB564, where applicable |
| Dimensional Standard | ASME B16.5, where applicable |
| Size | As per customer requirement |
| Pressure Class | As required by project |
| Facing | As specified by customer |
| Bore | As per pipe and stub-end requirements |
| Inspection | As per applicable specification and purchase order |
| Documentation | MTC and inspection documents as required |
Buyers and search engines may use different names for the same product. The following terms can refer to the UNS N04400 Monel 400 lapped joint flange product category:
UNS N04400 Monel 400 Lapped Joint Flanges can be considered for a range of industrial applications where corrosion resistance and convenient flange assembly are important. The alloy's established use in marine and seawater environments makes it relevant to selected piping and equipment connections.
Typical application areas include marine piping, seawater handling, chemical processing, petroleum processing, desalination, water treatment and selected oil and gas and petrochemical systems.
The final suitability of the flange should always be determined by the responsible engineer based on process conditions, pressure-temperature ratings, chemical compatibility, applicable codes and project specifications.
For quotations and technical enquiries related to UNS N04400 Monel 400 Lapped Joint Flanges, customers can contact Synergy Engineering Solution with the required flange size, pressure class, facing, quantity, standard, inspection requirements and delivery destination.
UNS N04400 Monel 400 Lapped Joint Flanges are loose-type flange components made from Monel 400 nickel-copper alloy and used with a suitable stub end in lapped joint piping connections. The loose flange can rotate around the stub end, helping with bolt-hole alignment during installation.
UNS N04400 is the UNS designation for Monel 400, a nickel-copper alloy known for its corrosion resistance, strength and toughness. It is commonly considered for suitable marine, seawater and chemical processing applications.
Monel 400 Lapped Joint Flanges are used in selected marine, seawater, chemical processing, petroleum processing, desalination, water treatment, oil and gas, petrochemical and industrial piping applications.
A lapped joint flange is a loose flange that can rotate around a compatible stub end. This can make bolt-hole alignment easier and can be useful for piping systems that require regular inspection, maintenance or dismantling.
Yes. Monel 400 is recognized for its resistance to seawater, marine environments and several chemical conditions. Actual suitability depends on the specific process fluid, temperature, concentration and operating conditions.
Synergy Engineering Solution is a leading manufacturer, stockist and worldwide exporter of UNS N04400 Monel 400 Lapped Joint Flanges, serving customers in India and international markets.
Yes. Synergy Engineering Solution has a strong Middle East and GCC export focus and supports enquiries from the UAE, Saudi Arabia, Qatar, Oman, Kuwait and Bahrain.
Yes. Customers can contact Synergy Engineering Solution in Mumbai, India, for requirements related to UNS N04400 Monel 400 Lapped Joint Flanges, including size, pressure class, quantity, standard and delivery requirements.
Depending on the product and project requirements, ASTM B564 and ASME SB564 may be applicable for forged nickel alloy flange material, while ASME B16.5 may be applicable for flange dimensions and pressure classes. The applicable standard should be confirmed for each order.
Customers can send the required flange size, pressure class, facing, bore, quantity, applicable standard, inspection requirements and delivery destination to Synergy Engineering Solution for a quotation.
Material Test Certificates and other inspection or quality documents can be supplied according to the applicable specification, purchase order and customer requirements.
Synergy Engineering Solution is a manufacturer, stockist and worldwide exporter focused on specialty alloy piping products. The company supports domestic and international customers, with a particular focus on Middle East and GCC markets.

