Description
Product Detail
Monel slip-on flanges are bored slightly larger than the pipe OD so the pipe can slip into the flange before fillet welding at the hub and back side. This design offers convenient installation, economical fabrication and reliable service in low to medium pressure systems requiring excellent resistance to seawater, hydrofluoric acid, alkalis and chloride-containing media. They are widely used in marine piping, offshore platforms, chemical processing, desalination and heat exchanger connections.
SASA FLANGE supplies Monel slip-on flanges in standard and custom dimensions with strict process control. Available inspection includes chemical analysis, mechanical testing, dimensional inspection and PMI testing to confirm alloy integrity. Each order can be supplied with EN 10204 3.1 material certificate, complete heat number traceability, clear marking and export packaging for international industrial projects.
- ✓Product Name: Monel Slip-On Flange
- ✓Material Grade: Monel 400 UNS N04400 / Monel K500 UNS N05500
- ✓Product Type: Nickel-Copper Alloy Slip-On Flange
- ✓Main Feature: Excellent seawater and chemical corrosion resistance with easy pipe alignment and welding
- ✓Applications: Marine, offshore, chemical processing, desalination, power and heat exchanger piping
Product Parameters
| Product Name | Monel Slip-On Flange |
| Material Grade | Monel 400 (UNS N04400), Monel K500 (UNS N05500) |
| Material Type | Nickel-Copper Alloy |
| Product Form | Forged flange or plate machined flange |
| 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, pickling, passivation, protective oil coating |
| 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 commonly supplied Monel grades used in slip-on flanges. Exact chemistry depends on the specified grade, manufacturing route and applicable standard. Final values are confirmed by the mill test certificate and incoming inspection results for each heat number supplied.
| 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 shown below are typical reference values for Monel grades commonly used for industrial flange manufacturing. Actual properties may vary with product form, heat treatment condition, section thickness and applicable specification. Certified mechanical test results can be provided based on the actual heat and production lot supplied.
| 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 | 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 |
|---|---|---|
| Slip-On Raised Face | Standard slip-on flange with raised face gasket seating surface | General corrosive service piping, seawater and chemical lines |
| Slip-On Flat Face | Flat sealing face suited for full-face gaskets and lower bolt load applications | FRP-lined systems, low pressure water and chemical service |
| Slip-On RTJ | Slip-on flange with ring type joint groove for higher pressure sealing | High pressure hydrocarbon and offshore process lines |
| Large Diameter Slip-On | ASME B16.47 or EN large size flange for low pressure large bore piping | Cooling water, marine intake and desalination systems |
Equivalent Standards and International Names
Monel slip-on flanges are manufactured to international dimensional standards, while the alloy designation may be specified by UNS, ASTM, DIN or EN material systems. Buyers should note that flange dimensions and material grades are specified separately. SASA FLANGE matches the required flange standard with the requested nickel-copper alloy grade for project compliance.
| Standard / Region | Standard Code | Typical Grade / Equivalent |
|---|---|---|
| USA | ASME B16.5 | Monel 400 UNS N04400 / Monel K500 UNS N05500 |
| Europe | EN 1092-1 | NiCu30Fe / nickel-copper alloy equivalent by customer requirement |
| Germany | DIN 2527 / 2566 | 2.4360 / 2.4375 equivalent nickel-copper alloy on request |
| Japan | JIS B2220 | Monel 400 equivalent nickel-copper alloy by specification |
| China | GB/T 9119 | NCu30 equivalent nickel-copper alloy by project requirement |
Production Process Flow
SASA FLANGE controls each manufacturing stage from raw material verification to final inspection to ensure accurate dimensions, alloy integrity and reliable sealing performance for Monel slip-on flanges used in corrosive 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 | 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 performed to verify the nickel, copper and other alloying elements meet the specified Monel grade requirements. Incoming raw material certificates are checked against spectrometer or laboratory test results to confirm conformity before production. This process helps ensure stable corrosion resistance and correct alloy identification for critical industrial service.
2. Mechanical Properties Testing
Mechanical testing verifies tensile strength, yield strength, elongation and hardness in accordance with the applicable material specification and heat treatment condition. These tests confirm that Monel slip-on flanges provide the required strength and ductility for fabrication, welding and operating loads in offshore, marine and chemical processing systems.
3. Dimensional Inspection
Each flange is inspected for outside diameter, bore size, thickness, bolt circle, bolt hole accuracy, hub dimensions and facing geometry. Raised face height, RTJ groove dimensions and sealing finish are checked according to the relevant flange standard. Strict dimensional inspection ensures easy assembly, proper alignment and reliable gasket sealing performance.
4. PMI Testing and Hydrostatic Testing
Positive Material Identification is carried out to confirm the supplied flange matches Monel 400 or Monel K500 as ordered. Hydrostatic testing can be arranged when required for assembled components or special project specifications. SASA FLANGE supplies EN 10204 3.1 certificate, inspection records, heat number traceability and marking for full quality documentation.
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 selected for piping systems that require strong resistance to seawater, salt solutions, alkalis and many reducing chemicals. Their easy fit-up and dependable performance make them suitable for fabricated pipe spools and process connections across demanding industrial environments where conventional stainless steel may not provide sufficient corrosion resistance.
| Industry | Typical Applications | Why This Product Is Used |
|---|---|---|
| Oil and Gas | Produced water lines, offshore utility piping, firewater and seawater systems | Offers excellent seawater corrosion resistance and practical installation for welded piping |
| Chemical Processing | Alkali handling, hydrofluoric acid service, heat exchangers and transfer lines | Monel alloy resists many corrosive chemicals and supports reliable flange joints |
| Power Generation | Cooling water circuits, condenser systems and flue gas auxiliary piping | Performs well in brackish water and high-corrosion utility environments |
| Water Treatment | Desalination plants, brine lines and marine intake or discharge piping | Nickel-copper alloy provides long service life in chloride-rich media |
| Marine and Offshore | Shipboard piping, ballast systems, seawater cooling and offshore platforms | High resistance to seawater attack, biofouling-related corrosion and splash zone exposure |
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 with a bore slightly larger than the pipe outside diameter, allowing the pipe to slide into position before welding. It is commonly used where corrosion resistance to seawater, chlorides, alkalis and certain acids is required, while also offering easier installation than weld neck flanges.
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 used for excellent corrosion resistance and good weldability, while Monel K500 provides higher strength through precipitation hardening. Material can be supplied as forged or plate-machined flanges depending on size, class and project requirements.
Q: What pressure class is supported?
A: Monel slip-on flanges are available in ASME Class 150, 300, 600, 900, 1500 and 2500, as well as EN and DIN pressure ratings such as PN6 to PN100. The final pressure rating depends on size, flange standard, material form and service conditions. Large diameter flanges are also available in ASME B16.47 dimensions.
Q: Can SASA FLANGE supply custom sizes?
A: Yes. SASA FLANGE can manufacture custom Monel slip-on flanges according to drawings or project specifications. We support special bore sizes, non-standard drilling, custom bolt holes, RTJ or special facing, large outside diameters and specific alloy requirements. Custom machining and inspection documentation are available for offshore, chemical and marine projects.
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 analysis, mechanical test reports, dimensional inspection records and PMI results. Hydrostatic or additional third-party inspection documentation can also be arranged according to purchase order and project specifications.
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
