Monel 400 Flanges – ASTM B564 / UNS N04400 Supplier & Exporter in India
Table of Content
- What are Monel 400 Flanges?
- Types of Monel 400 Flanges Available
- Standards Specification of Monel 400 Flanges
- Properties & Composition of Monel 400 Flanges
- Nickel Copper Alloy Flanges – Applications & Industries
- Difference Between Monel Alloy 400 Flanges and Fittings
- Monel 400 Flanges Price
- Monel 400 Flanges Sizes
- Frequently Asked Questions – Monel 400 Flanges
When discussing Monel 400 flanges producer, supplier, and exporter in compliance with ASTM B564, ASME SB564, and UNS N04400 specifications, Kalpataru Piping is a well-known name in this regard. As it is understood, Monel 400 is a nickel-copper alloy known for its amazing properties, strength as well as durability and power to resist corrosion. Since it is believed that copper content in this alloy is too high (in the range of 28-34%).
Our Monel 400 Flanges can be used in piping systems that come into contact with seawater, salts, and some chemical media and in applications with hydrofluoric and hydrochloric acid, subject to the correct service conditions. The properties make the flanges ideal for marine engineering, chemical processing, oil and gas, petrochemical, and industrial piping applications.
Kalpataru Piping offers Flanges as Monel 400 in various shapes, sizes, pressure ratings, and dimensional specifications, as per project demands. The types of flanges available are blind, slip-on, weld neck, socket weld, threaded, and RTJ flanges; inspection and documentation are available as required.
What are Monel 400 Flanges?
Kalpataru Piping is a well-known manufacturer, supplier and exporter of Monel 400 flanges with an ASTM B 564/ASME SB564 and UNS N04400 standard. Monel 400 flanges are nickel-copper superalloy products with a high level of specification that are used in all types of demanding industrial applications that require high strength, excellent corrosion resistance and extended life in harsh media such as seawater, hydrofluoric acid, hydrochloric acid and sour gas service.
Monel Alloy 400, also known as Werkstoff Nr. 2.4360, DIN 2.4360, BS NA 13, and EN NiCu30Fe with a nominal copper content of 28 -34% and a nickel content of over 63% is a solid-solution superalloy reinforced by cold working. Our flanges are standard and custom-designed in the broadest range of sizes, pressure classes, and facings to address the needs of international projects in the oil and gas industry, marine industry, desalination, chemical processing, and power generation industry.
Our Werkstoff Nr. 2.4360 Monel 400 flanges are all subject to stringent quality testing – dimensional inspection, PMI (Positive Material Identification), hydrostatic test and radiography when required in order to provide accurate material integrity and adherence to international standards. We distribute within India and export to various parts of the world in standard export-grade packing which avoids damage, corrosion and rust during transit.
Compliance & Approvals
Our ASTM B564 UNS N04400 flanges carry the certifications that oil & gas, petrochemical, and marine procurement teams require as pre-qualification criteria. Where competitors fall short, we hold the following approvals:
NACE MR0175 / ISO 15156
Qualified for sour service (H₂S environments), mandatory for offshore and upstream oil & gas projects.
EIL Approved Manufacturer
Engineers India Limited approved, a key procurement pre-qualification for refinery and petrochemical projects in India.
EN 10204 3.1 MTC
Third-party witnessed material test certificates supplied as standard, required by European and Middle East EPC contractors.
PED 2014/68/EU
Pressure Equipment Directive compliance for flanges supplied to European markets.
ISO 9001:2015
Certified quality management system governing all manufacturing, inspection, and dispatch processes.
HF Acid & Chloride Service
Material qualification records for hydrofluoric acid and hydrochloric acid service environments.
Types of Monel 400 Flanges Available
Monel 400 Slip On Flanges (SORF)
Monel 400 Blind Flanges (BLRF)
Monel 400 Weld Neck Flanges (WNRF)
Monel 400 Socket Weld Flanges (SWRF)
Monel 400 Threaded Flanges
Monel 400 RTJ Flanges
Monel 400 Flange Types
Weld Neck Flanges (WNRF)
Preferred for high-pressure offshore and process piping. Tapered hub ensures stress distribution and fatigue resistance. Available Class 150–2500 (ASME B16.5).
Blind Flanges (BLRF)
Solid disc design for vessel closures and pressure testing. Withstands maximum pressure with minimal deformation. Sizes ½″–48″ (ANSI B16.5).
Slip On Flanges (SORF)
Slide over pipe and secured with dual fillet welds. Ideal for low-pressure chemical and industrial applications with easy alignment.
Socket Weld Flanges (SWRF)
Designed for small-bore high-pressure lines. Pipe inserted into socket and welded. Common in hydraulic and instrument systems.
Threaded Flanges
No welding required. Suitable for low-pressure services and installations where hot work is restricted. Available up to Class 300.
RTJ Flanges
Ring Type Joint flanges with metallic gasket for high-pressure, high-temperature sealing. Used in wellhead and refinery applications.
Lap Joint Flanges
Used with stub ends for systems requiring frequent dismantling. Rotatable design simplifies bolt alignment and installation.
Orifice Flanges
Manufactured to ASME B16.36 with tapped holes for flow measurement. Supplied with jack screws and orifice plate carrier.
Standards Specification of ASTM B564 UNS N04400 Flanges
| Standard | Scope / Coverage | Typical Size / Rating |
| ASTM B564 | Forged flanges and forged fittings manufactured from nickel and nickel-alloy materials, including Alloy 400 / UNS N04400 | As specified by purchase order |
| ASME SB564 | ASME specification corresponding to ASTM B564 for nickel-alloy forgings, including Monel 400 | As specified by applicable specification |
| ASME B16.5 | Pipe flanges and flanged fittings; covers dimensions, pressure-temperature ratings, tolerances, marking, and testing | NPS ½ to 24; Classes 150, 300, 400, 600, 900, 1500; Class 2500 up to NPS 12 |
| ASME B16.47 | Large-diameter steel flange dimensional and pressure-rating standard | NPS 26 to 60; Classes 75, 150, 300, 400, 600, 900 |
| ASME B16.36 | Orifice flanges with orifice pressure-differential connections | Welding Neck Classes 300–2500; Slip-On and Threaded Class 300 |
| EN 1092-1 | European flange standard covering flange dimensions, facing types, nominal sizes, pressure designations, and material identification | DN sizes and PN ratings according to applicable flange type |
| JIS B2220 | Japanese standard for steel pipe flanges and associated dimensions and pressure designations | According to applicable JIS pressure class and size |
| DIN / EN Standards | Flange dimensions and facing configurations for European projects, as specified by the applicable EN/DIN standard | According to project specification |
| API / MSS Standards | Applicable where specifically required for refinery, petrochemical, oil & gas, or large-diameter piping projects | According to applicable standard and project requirements |
Monel 400 Flanges (Werkstoff No. 2.4360) – European Standards
Monel 400 Flanges, identified as UNS N04400 / Werkstoff No. 2.4360, can be supplied for European piping and process applications according to project requirements. EN 1092-1 provides the applicable flange dimensions and PN pressure designations, including PN 6, PN 10, PN 16, PN 25, PN 40, and PN 64, subject to flange type and size. Kalpataru Piping can provide EN 10204 3.1 material certificates and dimensional documentation as specified by the customer or project.
Chemical Composition & Mechanical Properties of Monel Alloy 400 Flanges
|
Grade |
C (max) |
Mn (max) |
Si (max) |
S (max) |
Cu |
Fe (max) |
Ni (min) |
|
Monel 400 / UNS N04400 |
0.30% |
2.00% |
0.50% |
0.024% |
28.00 – 34.00% |
2.50% |
63.00% |
Mechanical Properties
- Tensile Strength: 550 MPa (80,000 psi)
- Yield Strength : (0.2%)240 MPa (35,000 psi)
- Min. Yield (Reducing) :195 MPa
- Elongation: 40%
- Max. Service Temp: 538°C (1000°F)
Physical Properties
- Density: 8.83 g/cm³ (0.318 lb/in³)
- Melting Point: 1300–1390°C (2372–2534°F)
- Elasticity Modulus: 105–120 kN/mm²
- Rigidity Modulus: 65.3 kN/mm²
- Thermal Expansion: 13.9 µm/m·°C (20–100°C)
Pressure Rating Chart – ASME B16.5 Monel Flanges (psi)
Pressure ratings for ASTM B564 UNS N04400 flanges across ASME pressure classes at key operating temperatures. Pair your flanges with our Monel 400 Fasteners (stud bolts & hex nuts) — which are purchased together for every flanged joint.
|
Temp (°F) |
Class 150 |
Class 300 |
Class 600 |
Class 900 |
Class 1500 |
Class 2500 |
|
-20 to 100 |
275 |
720 |
1,440 |
2,160 |
3,600 |
6,000 |
|
300 |
205 |
540 |
1,080 |
1,620 |
2,700 |
4,500 |
|
500 |
170 |
465 |
930 |
1,395 |
2,330 |
3,880 |
|
750 |
95 |
415 |
830 |
1,245 |
2,075 |
3,460 |
|
1000 |
20 |
320 |
640 |
965 |
1,605 |
2,675 |
|
1250 |
20 |
115 |
225 |
340 |
565 |
945 |
Nickel Copper Alloy Flanges – Applications & Industries
Nickel copper alloy flanges, including Monel 400, are selected for piping systems where strong mechanical properties and resistance to seawater, brine, and certain corrosive media are required. Their nickel-copper composition makes them suitable for demanding service conditions across several industries.
- Oil & Gas: Offshore piping, subsea systems, manifolds, and sour-service applications where applicable.
- Desalination: Seawater intake systems, brine handling, and concentrate lines.
- Marine & Shipbuilding: Seawater piping, heat exchangers, and marine equipment.
- Chemical Processing: Selected hydrofluoric acid, hydrochloric acid, and chemical-handling applications under suitable conditions.
- Power Generation: Circulating water systems, condenser components, and brine-handling equipment.
For pipe direction changes and reductions, explore our Monel 400 Buttweld Fittings, including elbows, tees, and reducers, for compatible piping configurations.
Monel 400 Flanges Specifications at a Glance [b564 n04400]
| Parameter | Details |
| Material Standard | ASTM B564 / ASME SB564 |
| Grade | Monel 400 / UNS N04400 / Werkstoff 2.4360 / DIN 2.4360 |
| Size Range | ½″ to 48″ (DN 15 to DN 1200); custom DN 10 to DN 5000 |
| Pressure Classes | ASME: 150, 300, 400, 600, 900, 1500, 2500 | DIN/EN: PN 6 to PN 64 | JIS: 5K to 63K |
| Facing Types | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Large/Small Tongue & Groove, Male-Female, Lap Joint |
| Manufacturing Method | Forged, Machined, Heat-Treated, Plate, Threaded, Cast |
| Surface Finish | Serrated Concentric, Serrated Spiral, Smooth, Mirror |
| Dimensional Standards | ASME B16.5, B16.47, B16.36 | EN 1092-1 | BS 4504 | JIS B2220 | AS 2129 |
Value-Added Manufacturing Services
Beyond standard flange supply, our in-house machining facility enables fully finished Monel 400 flanges dispatched ready for immediate installation:
CNC Machining & Milling
Precision CNC turning and milling to tight tolerances on flanges up to 60″ OD. Custom bore, facing, and groove profiles machined as per drawings.
Drilling & Tapping
Bolt hole drilling to ASME, DIN, JIS, or custom PCD layouts. Threaded flanges tapped to NPT, BSP, or metric specifications.
Stampings & Marking
Heat number, material grade, size, pressure class, and manufacturer markings applied as per ASME B16.5. Custom stamping available.
Heat Treatment
Solution annealing for improved ductility and fabrication ease. Tempering options available for enhanced impact resistance at low temperatures.
Difference Between Monel Alloy 400 Flanges and Fittings
Monel Alloy 400 flanges and fittings are both critical components in a complete piping system but serve distinct functions. See our Monel 400 Buttweld Fittings page for elbows, tees, and reducers.
| Property | Monel Alloy 400 Flange | Monel Alloy 400 Fitting |
| Primary Function | Join pipe ends to valves, pumps, or equipment | Connect, change direction, or reduce pipe size |
| Typical Applications | Pipe section assembly and equipment connections | Elbows, tees, reducers, pipe connections |
| Size Range | Typically up to 48 inches or larger | Generally up to 4 inches (standard BW fittings to 24″) |
| Installation Method | Bolting and welding | Threaded, welded, or mechanical connections |
| Maintenance Access | Easy disassembly for inspection | Permanent or semi-permanent connections |
Monel 400 Flanges Price
The Monel 400 Flanges price depends on factors such as size, flange type, pressure class, quantity, facing, material requirements, and testing specifications. Market conditions for nickel and copper may also influence the final cost. Kalpataru Piping provides Monel 400 Flanges at competitive prices based on project requirements. Contact our team with your specifications to receive a customized quotation and current
Monel 400 Flanges Sizes
Kalpataru Piping supplies Monel 400 Flanges in a wide range of sizes to meet different piping and equipment requirements. Standard sizes can be supplied according to applicable dimensional standards such as ASME B16.5, while larger-diameter flanges can be manufactured according to applicable project specifications and standards. Custom sizes, dimensions, bore configurations, and flange thicknesses can also be produced based on approved drawings and customer requirements.
Related Products & Internal Links
Complete your piping system bill of materials with our full range of Monel Alloy 400 products. Every flanged joint requires fasteners; every pipeline requires fittings and pipes, all available from one certified source:
- Monel 400 Fasteners (Stud Bolts & Hex Nuts)
- Monel 400 Pipes & Tubes
- Monel 400 Buttweld Fittings
- Monel 400 Forged Fittings
- Monel 400 Olets
- Monel K500 Flanges
- Monel 400 Round Bars & Wires
- Monel 400 vs Inconel 625 – Selection Guide
Frequently Asked Questions – Monel 400 Flanges
What types of Monel 400 Flanges are available?
Available types include Weld Neck, Slip-On, Blind, Threaded, Socket Weld, Lap Joint, Orifice, Raised Face, and Plate Flanges, suitable for various industrial and marine applications.
What industries use Monel 400 Flanges?
They are widely used in oil & gas, chemical processing, petrochemical, marine engineering, nuclear, and desalination plants due to their resistance to seawater, acids, and high temperatures.
What is the pressure rating of Monel 400 Flanges?
Monel 400 flanges comply with international standards, covering pressure ratings from PN6 to PN64 and 150# to 2500#, suitable for high-pressure industrial applications.
Can Monel 400 Flanges withstand seawater and acidic conditions?
Yes, UNS N04400 flanges resist seawater, brine, hydrochloric acid, and other reducing media, making them ideal for marine and chemical applications.
How are Monel 400 Flanges fabricated?
Monel 400 flanges are manufactured via forging, casting, and precision machining, with optional cold working to enhance hardness while maintaining corrosion resistance.
What standards do Monel 400 Flanges comply with?
They comply with ASTM B564, DIN 2.4360, and other international standards, ensuring consistent quality, dimensions, and performance in critical applications.
Are Monel 400 Flanges suitable for high-temperature applications?
Yes, Alloy 400 flanges maintain mechanical strength and corrosion resistance at temperatures up to 538°C (1000°F), making them suitable for high-temperature industrial systems.
Get a Quote for Monel 400 Flanges
Contact us today for competitive pricing, material test reports, dimensional drawings, and availability on all ASTM B564 UNS N04400 flange types and sizes. Our technical team responds within 24 hours.
