Description
Product Detail
Monel slip-on flanges are forged or machined nickel-copper alloy flanges that slide over the pipe and are fillet welded internally and externally for secure assembly. They combine good installation efficiency with excellent resistance to seawater, hydrofluoric acid, alkalis and chloride-bearing media. Typical applications include marine piping, offshore platforms, desalination units, chemical plants, heat exchangers and power industry auxiliary systems where corrosion resistance and long service life are essential.
SASA FLANGE supplies Monel slip-on flanges in standard and customized sizes according to ASME B16.5, ASME B16.47, EN 1092-1, DIN, JIS and GB requirements. Each order can be supported with chemical analysis, mechanical testing, dimensional inspection, PMI testing, EN 10204 3.1 certificate and full heat number traceability to meet project and end-user documentation requirements.
- ✓Product Name: Monel Slip-On Flanges
- ✓Material Grade: Monel 400 / UNS N04400 and Monel K500 / UNS N05500
- ✓Product Type: Slip-On Flanges for welded piping connections
- ✓Main Feature: Excellent seawater and chemical corrosion resistance with easy alignment and installation
- ✓Applications: Offshore, marine, chemical processing, desalination, power and water treatment systems
Product Parameters
| Product Name | Monel Slip-On Flanges |
| Material Grade | Monel 400 / UNS N04400, Monel K500 / UNS N05500 |
| Material Type | Nickel-Copper Alloy |
| Product Form | Forged and CNC machined Slip-On Flanges |
| Size Range | DN15 – DN1500 (1/2 inch – 60 inch) |
| Pressure Class | Class 150 – 2500 / PN6 – PN100 |
| Sealing Face | RF, FF, RTJ, TG, MFM |
| Surface Treatment | Natural machined, pickled, passivated, protective oil coating |
| Standard | ASME B16.5, ASME B16.47, EN 1092-1, DIN, JIS, GB or customer specification |
| Inspection | Chemical Analysis, Mechanical Test, PMI Test, Dimensional, Hydrostatic |
| Certificate | EN 10204 3.1 Material Certificate available |
| Processing Service | Cutting, CNC Machining, Custom Drilling, Custom Size Processing |
Chemical Composition
The following chemical composition is for reference for common Monel flange grades used in slip-on flange production. Actual composition may vary slightly by grade, product form and applicable ASTM or customer specification. Final chemical values shall follow the approved material test certificate, purchase order requirements and the governing standard for the supplied heat.
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | Other |
|---|---|---|---|---|---|---|---|---|---|
| Monel 400 Content % | 0.30 max | 0.50 max | 2.00 max | 0.024 max | 0.024 max | 0.50 max | 63.0 min | 0.50 max | Cu 28.0-34.0, Fe 2.5 max |
Mechanical Properties
Mechanical properties shown below are typical reference values for common Monel grades used for forged flanges. Actual values may vary depending on heat treatment condition, section thickness, forging reduction and applicable specification. For project supply, SASA FLANGE issues tested values based on the material certificate and relevant inspection records for each production lot.
| Grade | Tensile Strength | Yield Strength | Elongation | Hardness | Density |
|---|---|---|---|---|---|
| Monel 400 / UNS N04400 | 480 MPa min | 170 MPa min | 35% min | 150 HB max | 8.80 g/cm3 |
| Monel K500 / UNS N05500 | 965 MPa min | 690 MPa min | 20% min | 35 HRC max | 8.44 g/cm3 |
Common Size Table
| Size Range | Pressure Class | Sealing Face | Material | Availability |
|---|---|---|---|---|
| DN15 – DN50 | Class 150 – 600 | RF | Monel 400 | Stock / Production |
| DN65 – DN300 | Class 150 – 1500 | RF / RTJ | Monel 400 / Monel K500 | Stock / Production |
| DN350 – DN600 | Class 150 – 2500 | RF / RTJ | Monel 400 / Monel K500 | Production |
| DN700 – DN1500 | Class 150 – 900 | RF | Monel 400 | Made to Order |
Different Specifications Comparison
| Type | Description | Typical Use |
|---|---|---|
| ASME Slip-On RF | Raised face slip-on flange for standard process piping, welded with internal and external fillet welds | Oil and gas, chemical and utility piping |
| ASME Slip-On RTJ | Ring type joint slip-on flange for higher pressure service requiring metal-to-metal gasket sealing | Offshore, refinery and high-pressure process lines |
| EN 1092-1 Type 12 | European slip-on hubbed flange with PN rating and flat or raised sealing arrangements depending design | Water, chemical and industrial plant piping |
| Custom Drilled Slip-On | Non-standard bolt pattern, bore or face machining according to project drawings | Retrofit systems, OEM skids and replacement maintenance work |
Equivalent Standards and International Names
Monel slip-on flanges can be manufactured to major international flange dimensional standards, while the alloy grade is generally specified by UNS or trade designation such as Monel 400 or Monel K500. Equivalent naming may vary by region, but material verification, PMI testing and final certification ensure the supplied flanges meet the ordered alloy and dimensional standard.
| Standard / Region | Standard Code | Typical Grade / Equivalent |
|---|---|---|
| USA | ASME B16.5 | Monel 400 / UNS N04400, Monel K500 / UNS N05500 |
| Europe | EN 1092-1 | NiCu30Fe equivalent based on project material designation |
| Germany | DIN 2527 / 2566 | Monel 400 equivalent nickel-copper alloy by customer specification |
| Japan | JIS B2220 | Monel 400 / Monel K500 to agreed alloy and drilling standard |
| China | GB/T 9119 | Monel 400 / UNS N04400 nickel-copper alloy flange |
Production Process Flow
SASA FLANGE controls each production stage for Monel slip-on flanges, from alloy verification to finish machining and final inspection. Process control is important to maintain corrosion resistance, dimensional accuracy and traceability for demanding industrial service.
- 1. Raw Material Selection
- 2. Forging / Cutting
- 3. Heat Treatment
- 4. Rough Machining
- 5. Finish Machining
- 6. Drilling
- 7. Surface Treatment
- 8. Inspection
- 9. Marking
- 10. Packing
- 11. Delivery
| Process Step | Description | Quality Control Point |
|---|---|---|
| Raw Material | Select certified forging billets or plates | Material certificate and traceability |
| Forging | Hot forging to achieve required shape | Forging temperature and reduction ratio |
| Heat Treatment | Normalizing, tempering or annealing | Temperature and holding time control |
| Machining | Sealing face, bolt holes, dimensions | Dimensional accuracy and surface finish |
| Inspection | Final inspection before shipment | Dimension, surface, PMI, hydrostatic |
Product Inspection
1. Chemical Composition Inspection
Chemical analysis is performed to verify that the nickel, copper and minor element content conforms to the required Monel grade. Spectrometer or laboratory testing is used to confirm alloy identity before and during production. This helps ensure the flange material matches project specifications for corrosion resistance, weldability and service reliability.
2. Mechanical Properties Testing
Mechanical testing is carried out according to applicable material standards or project requirements. Typical verification includes tensile strength, yield strength, elongation and hardness. These tests confirm that the Monel flange material has the required strength and ductility after forging and heat treatment, especially for higher pressure and offshore service conditions.
3. Dimensional Inspection
Each slip-on flange is checked for outside diameter, bore size, thickness, bolt circle, bolt hole quantity, flange height and sealing face finish. Inspection is performed against ASME, EN, DIN, JIS, GB or customer drawings. Accurate dimensions are essential for fit-up, weld alignment, gasket sealing performance and trouble-free field installation.
4. PMI Testing and Hydrostatic Testing
Positive Material Identification is conducted to verify the supplied alloy grade, especially for Monel 400 and Monel K500 project orders. When required, hydrostatic or assembly pressure testing can be arranged for flange-pipe components. SASA FLANGE provides EN 10204 3.1 certification, inspection records and traceability documentation for each shipment.
Product Packaging
- ✓Wooden Case Packaging: Suitable for high-pressure and large-diameter products
- ✓Pallet Packing with Shrink Wrap: Suitable for batch shipments and standard sizes
- ✓Anti-rust Oil Coating + Waterproof Paper: Used for ocean freight protection
- ✓Individual Plastic Bag + Carton: Used for small fittings and threaded products
- ✓Clear Marking: Grade, size, pressure class, heat number and PO number
Applications
Monel slip-on flanges are widely used where conventional carbon steel or stainless steel may suffer from rapid corrosion in chloride, seawater or aggressive chemical environments. Their nickel-copper alloy composition provides reliable long-term performance in critical piping systems across process, marine and utility industries.
| Industry | Typical Applications | Why This Product Is Used |
|---|---|---|
| Oil and Gas | Produced water lines, offshore utility piping, firewater and seawater systems | Excellent resistance to seawater corrosion and reliable performance in offshore environments |
| Chemical Processing | Alkali service, hydrofluoric acid systems, heat exchanger piping and transfer lines | Nickel-copper alloy offers strong corrosion resistance in selected aggressive media |
| Power Generation | Cooling water circuits, condenser connections and auxiliary corrosive fluid piping | Long service life and good resistance to erosion-corrosion in wet service |
| Water Treatment | Desalination plants, brine piping and seawater intake or discharge systems | Suitable for chloride-rich and saline environments where durability is essential |
| Marine and Offshore | Shipboard piping, ballast systems, deck utilities and offshore modules | Monel is preferred for marine exposure, salt spray resistance and dependable service |
Why Choose SASA FLANGE?
- ✓Professional manufacturer of Slip-On Flanges for global industrial projects
- ✓Customized size, pressure class and material grade according to drawings
- ✓Full standard support: ASME, EN, DIN, JIS, GB, GOST and customer specifications
- ✓Material traceability with heat number control and EN 10204 3.1 material certificate
- ✓Chemical analysis, mechanical testing, PMI testing, hydrostatic and dimensional inspection
- ✓Stock availability for standard items, lead time 3-7 days; custom production 15-30 days
- ✓Export-grade packaging for sea, air and land transportation
- ✓15+ years experience supplying 50+ countries worldwide
FAQ
Q: What is a Monel slip-on flange?
A: A Monel slip-on flange is a nickel-copper alloy flange designed to slide over the pipe before welding. It is typically fillet welded on both the inside and outside to create a secure connection. This flange type is widely used where corrosion resistance to seawater, brine and selected chemicals is more important than using standard carbon steel materials.
Q: What materials are available for Monel slip-on flanges?
A: SASA FLANGE commonly supplies Monel 400 and Monel K500 slip-on flanges. Monel 400 is widely selected for excellent corrosion resistance and good weldability, while Monel K500 provides higher strength through age hardening. Material selection depends on pressure, temperature, corrosion environment and customer specification. Other nickel alloy grades can also be discussed for custom projects.
Q: What pressure class is supported?
A: Monel slip-on flanges can be supplied in ASME Class 150, 300, 600, 900, 1500 and 2500, depending on size and design standard. For European and international projects, PN6 to PN100 ratings are also available according to EN, DIN or GB standards. The final pressure rating should always match the piping design code and project operating conditions.
Q: Can SASA FLANGE supply custom sizes?
A: Yes. SASA FLANGE can manufacture custom Monel slip-on flanges based on drawings or special project requirements. We support non-standard bore sizes, custom drilling patterns, special facing types, thickness changes and specific alloy grades. This service is suitable for replacement flanges, skid packages, OEM equipment and retrofit piping systems where standard dimensions are not sufficient.
Q: What certificate is provided?
A: SASA FLANGE provides EN 10204 3.1 material certificate for Monel slip-on flanges, together with standard marking and heat number traceability. Additional documentation may include chemical analysis results, mechanical test reports, dimensional inspection records and PMI reports. Hydrostatic or third-party inspection documents can also be arranged when specified in the purchase order or project requirement.
Contact Us
If you are looking for monel flanges or related custom flange products, please contact SASA FLANGE with your required size, pressure class, material grade, standard, surface treatment, quantity and inspection requirements. Our team will provide professional technical solutions and competitive quotation within 24 hours.
- 📧 Email: sales@sasaflange.com
- 📱 WhatsApp: +86 13764965049
- ☎️ Tel: +86 21 52236361
- 🌐 Website: www.sasaflange.com
