Monel 400 Flanges – ASTM B564 / UNS N04400 Supplier & Exporter in India
Kalpataru piping solutions is a reputable manufacturer, supplier and exporter of Monel 400 flanges produced under ASTM B564 / ASME B564 and UNS N04400 standards. Monel Alloy 400 flanges are also commonly used in highly industrialized applications with the need to be strong, resistant to corrosion and have long service life. We provide standard and designed Monel 400 flanges of a wide selection of sizes, types of pressure classes and facing to meet international project needs. Other products that we supply with flanges include: Monel 400 pipes and tubes, Monel fasteners, and we offer full piping and fastening solutions.
The quality of all our Werkstoff Nr. 2.4360 Monel 400 flanges are carefully checked through quality tests that are aimed at providing accuracy in dimensions, integrity of material and meeting international standards. These flanges are not only supplied in India but also exported to the rest of the world through standard export-grade packaging that does not cause damage, corrosion or rust during transit.
What are Monel 400 Flanges?
Kalpataru Piping Solutions 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.
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.
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
Standards Specification of ASTM B564 UNS N04400 Flanges
Our Monel 400 flanges are manufactured and supplied to the following international standards, covering domestic Indian projects, European export requirements, and global EPC contracts:
|
Standard |
Coverage |
Applicable Flange Types |
|
ASME B16.5 |
NPS ½ to 24, Class 150–2500 |
WNRF, SORF, BLRF, LJF, Threaded, SWRF |
|
ASME B16.47 |
NPS 26 to 60, Large Diameter |
Weld Neck, Blind, Slip On (Series A & B) |
|
ASME B16.36 |
Orifice Flanges |
WNRF Classes 300, 600, 900, 1500, 2500 |
|
DIN 2.4360 / EN 1092-1 |
PN 6 to PN 64 |
All types — European Werkstoff standard |
|
BS 4504 / BS 10 |
Tables D, E, F, G, H, J, K |
UK / Commonwealth project specifications |
|
AS 2129 |
Tables C to J |
Australian project requirements |
|
JIS B2220 |
5K, 10K, 16K, 20K, 30K, 40K, 63K |
Japanese industrial specifications |
|
MSS SP44 / API 605 |
Large Diameter, API refinery service |
Weld Neck, Blind |
|
GOST 12820 |
Russian / CIS market standards |
Flat-face, raised-face types |
DIN 2.4360 Monel 400 Flanges – European Standard
European and Middle Eastern EPC contractors frequently specify DIN 2.4360 flanges — the Werkstoff designation for Monel Alloy 400 — under EN 1092-1 pressure ratings (PN 6, PN 10, PN 16, PN 25, PN 40, PN 64) instead of ASME class designations. Our facility is equipped to produce and certify Werkstoff Nr. 2.4360 Monel 400 flanges to EN 10204 3.1 MTC, with dimensional compliance to EN 1092-1 and EN 1092-2, making them directly suitable for European pressure vessel and piping system projects without re-certification.
Equivalent designations: UNS N04400 | Werkstoff 2.4360 | BS NA 13 | GOST МНЖМц 28-2.5-1.5 | AFNOR NU-30M | EN NiCu30Fe
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 in the Monel family are chosen where stainless steel flanges fail. The combination of nickel and copper provides immunity to corrosion in seawater, brine, hydrofluoric acid service, and reducing acid environments that would attack 316L or duplex stainless grades. Key industries and applications include:
- Oil & Gas: Offshore platforms, subsea manifolds, sour gas (H₂S) service — NACE MR0175 compliant
- Desalination: MSF and RO plant seawater intake, high-pressure membranes, concentrate lines
- Marine & Shipbuilding: Seawater piping, heat exchangers, propulsion system flanges
- Chemical Processing: HF acid alkylation units, HCl service, chlorinated solvent handling
- Power Generation: Condenser water boxes, circulating water systems, brine heaters
- Pharmaceutical & Food: Ultra-pure water systems, CIP/SIP lines
For directional changes and pipe reductions within these systems, explore our Monel 400 Buttweld Fittings (elbows, tees, reducers) which connect directly to flanged pipe ends in the same alloy and standard.
Key Specifications at a Glance
|
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 |
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.
