Description
Product Detail
Monel slip on flange is a pipe flange with a bore slightly larger than the pipe outside diameter, allowing the pipe to slip into the flange before fillet welding at the hub and back. It provides economical installation, good alignment and dependable sealing performance in low to medium pressure systems, while selected sizes and designs are also used in more demanding corrosive environments. Monel alloys are especially valued for excellent resistance to seawater, salt solutions, alkalis and many reducing chemicals.
SASA FLANGE supplies Monel slip on flanges in standard and customized sizes with controlled raw materials and strict inspection. Available services include chemical analysis, mechanical testing, dimensional inspection, PMI testing, sealing face verification and full heat number traceability. EN 10204 3.1 certificate is available for project and export requirements.
- ✓Product Name: Monel Slip On Flange
- ✓Material Grade: Monel 400 and Monel K500
- ✓Product Type: Slip-On Flanges
- ✓Main Feature: Excellent corrosion resistance in marine, chloride and chemical environments with easy pipe alignment and welding
- ✓Applications: Offshore, seawater piping, chemical plants, power stations, desalination and process pipelines
Product Parameters
| Product Name | Monel Slip On Flange |
| Material Grade | Monel 400 (UNS N04400), Monel K500 (UNS N05500) |
| Material Type | Nickel-Copper Alloy Forging |
| Product Form | Slip-On Flange, forged or plate machined as per standard and customer drawing |
| 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 | Pickling, passivation, machined finish, protective oil on machined surfaces |
| Standard | ASME B16.5, ASME B16.47, EN 1092-1, DIN, JIS B2220, GB/T 9119 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 general reference for common Monel grades used in slip on flanges. Actual composition may vary slightly by grade, product form and applicable ASTM or customer specification. Final values shall comply with the relevant standard and the material test certificate supplied with each batch.
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | Other |
|---|---|---|---|---|---|---|---|---|---|
| Monel 400 | 0.30 max | 0.50 max | 2.00 max | 0.024 max | 0.024 max | – | 63.0 min | – | Cu 28.0-34.0, Fe 2.5 max |
Mechanical Properties
Mechanical properties of Monel slip on flanges depend on alloy grade, forging route, heat treatment condition and section thickness. The values below are typical reference figures for commonly used Monel grades in flange applications. Final certified values shall be confirmed by actual test reports and project specification requirements.
| Grade | Tensile Strength | Yield Strength | Elongation | Hardness | Density |
|---|---|---|---|---|---|
| Monel 400 | 480 MPa min | 170 MPa min | 35% min | 150 HB max | 8.80 g/cm3 |
| Monel K500 | 965 MPa min | 690 MPa min | 20% min | 345 HB 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 with standard bore for pipe insertion and fillet welding | General process piping, chemical and marine systems |
| ASME Slip-On RTJ | Ring type joint slip-on flange for improved sealing in higher pressure service | Hydrocarbon, offshore and critical process lines |
| EN Plate/Slip-On Type | European standard flange drilled to EN dimensions with flat or raised face options | Industrial utilities, water and process plants |
| Custom Monel Slip-On | Special drilling, thickness, hub dimensions or facing according to drawing | Retrofit projects, OEM equipment and corrosive specialty service |
Equivalent Standards and International Names
Monel slip on flanges can be produced to major international dimensional standards, while the alloy grade is selected to meet corrosion and mechanical requirements. Equivalent naming may vary by region, but Monel 400 and Monel K500 are widely recognized nickel-copper alloys for corrosive service. Final compliance is confirmed by drawing, standard and certified material documents.
| Standard / Region | Standard Code | Typical Grade / Equivalent |
|---|---|---|
| USA | ASME B16.5 | Monel 400 / UNS N04400, Monel K500 / UNS N05500 |
| Europe | EN 1092-1 | Nickel alloy flange in 2.4360 equivalent service material |
| Germany | DIN 2527 / 2566 | NiCu30Fe equivalent corrosive service flange |
| Japan | JIS B2220 | Monel 400 equivalent nickel-copper alloy upon request |
| China | GB/T 9119 | Monel 400 / NS1402 equivalent by customer specification |
Production Process Flow
Manufacturing of Monel slip on flanges requires strict control of alloy identity, machining accuracy and sealing face quality. Each step is monitored to ensure corrosion resistance, dimensional compliance and dependable welding performance in 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 | Solution annealing or age hardening according to grade | 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 carried out to verify the nickel, copper and other alloying elements meet the required Monel grade specification. Spectrometer or laboratory testing is used on incoming raw materials and, where required, finished products. This inspection helps ensure corrosion resistance, alloy conformity and reliable performance in demanding marine and chemical environments.
2. Mechanical Properties Testing
Mechanical testing is performed according to the applicable material standard and project requirement. Tensile strength, yield strength, elongation and hardness are reviewed to confirm the flange material meets expected service conditions. For Monel grades, test results are especially important for offshore, pressure piping and other applications requiring both corrosion resistance and adequate mechanical integrity.
3. Dimensional Inspection
Dimensional inspection checks outside diameter, bore, thickness, bolt circle, bolt hole diameter, hub dimensions and facing details against ASME, EN, DIN, JIS, GB or approved drawings. Sealing face finish and drilling accuracy are also verified. This ensures proper fit-up with mating flanges, correct pipe insertion and secure assembly during field installation.
4. PMI Testing and Hydrostatic Testing
Positive Material Identification is used to confirm the supplied flange is the specified Monel alloy and to prevent mixed materials in project supply. Hydrostatic testing can be arranged when required as part of assembly or customer inspection plans. SASA FLANGE provides EN 10204 3.1 certificate, supporting MTC documentation, PMI records and full traceability for export projects.
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 chloride corrosion, seawater exposure and aggressive process media make standard stainless steel less suitable. Their nickel-copper alloy composition provides dependable corrosion resistance and long service life in marine, chemical and specialty process systems requiring secure flange connections.
| Industry | Typical Applications | Why This Product Is Used |
|---|---|---|
| Oil and Gas | Offshore piping, produced water lines, seawater injection and utility systems | Good resistance to seawater, salt-laden atmosphere and corrosive media |
| Chemical Processing | Hydrofluoric acid units, alkali handling and specialty chemical transfer lines | Monel offers strong resistance to many reducing acids and alkalis |
| Power Generation | Cooling water systems, condenser service and auxiliary chemical piping | Provides durability in wet, chloride-bearing and high-reliability plant environments |
| Water Treatment | Desalination plants, brine systems and seawater handling pipelines | Excellent resistance to chloride attack and marine corrosion |
| Marine and Offshore | Shipboard piping, ballast systems and offshore platform utilities | Nickel-copper alloy performs well in seawater and splash zone conditions |
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 flange made from nickel-copper alloy, usually Monel 400 or Monel K500, designed so the pipe slips into the bore before welding. It is commonly used in corrosive service where resistance to seawater, chlorides and certain chemicals is required, while also allowing easier alignment and installation than some other flange types.
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 general marine and chemical corrosion resistance, while Monel K500 offers higher strength through age hardening. Material can be produced from certified forgings or machined from approved stock according to the applicable standard and project requirements.
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, design and project specification. For EN and DIN systems, PN6 to PN100 can be provided. Final pressure rating depends on flange dimensions, alloy grade, temperature conditions and the applicable design standard.
Q: Can SASA FLANGE supply custom sizes?
A: Yes. SASA FLANGE can manufacture Monel slip on flanges in custom sizes, non-standard drilling patterns, special bore dimensions, sealing faces and thicknesses according to customer drawings. We also support project-specific materials, facing finishes and marking requirements, making the product suitable for replacement work, OEM equipment and special corrosive service piping systems.
Q: What certificate is provided?
A: SASA FLANGE can provide EN 10204 3.1 material certificate with heat number traceability for Monel slip on flanges. Supporting documents may include MTC, chemical composition reports, mechanical test results, dimensional inspection records and PMI reports. Hydrostatic testing or third-party inspection documentation can also be arranged according to the purchase order or project specification.
Contact Us
If you are looking for flange slip on monel 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
