Description
Product Detail
Slip on flange AL6XN is a flat-face or raised-face flange with a bore slightly larger than the pipe outside diameter, allowing the pipe to slip into the flange before welding. Manufactured from super austenitic stainless steel AL-6XN, it combines easy installation with excellent resistance to chloride pitting, crevice corrosion and aggressive process media. It is widely used in seawater systems, offshore platforms, desalination plants, pulp and paper, flue gas desulfurization and chemical processing lines.
SASA FLANGE supplies standard and custom AL6XN slip-on flanges to ASME B16.5, ASME B16.47, EN 1092-1, DIN, JIS and GB requirements. Each batch can be provided with chemical analysis, mechanical testing, dimensional inspection, PMI testing, EN 10204 3.1 certificate and full heat number traceability for project and end-user approval.
- ✓Product Name: Slip On Flange AL6XN
- ✓Material Grade: AL-6XN / UNS N08367 super austenitic stainless steel
- ✓Product Type: Slip-On Flange
- ✓Main Feature: Excellent resistance to chloride pitting, crevice corrosion and seawater service
- ✓Applications: Offshore, desalination, chemical processing, marine piping, power and water treatment systems
Product Parameters
| Product Name | Slip On Flange AL6XN |
| Material Grade | AL-6XN / UNS N08367, 1.4529 equivalent on request |
| Material Type | Super austenitic stainless steel |
| Product Form | Forged and machined slip-on flange |
| Size Range | DN15 – DN1500 (1/2 inch – 60 inch) |
| Pressure Class | Class 150 – 1500 / PN10 – PN100 |
| Sealing Face | RF, FF, RTJ, TG, MFM |
| Surface Treatment | Pickling, passivation, machined finish, protective oil on carbon steel backing areas if required |
| 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 reference for AL-6XN / UNS N08367 material used in slip-on flanges. Final composition depends on the applicable material specification, approved mill source and project requirements. Values shown should be verified against the official MTC and EN 10204 3.1 certificate for each production heat.
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | Other |
|---|---|---|---|---|---|---|---|---|---|
| Content % | 0.03 max | 1.00 max | 2.00 max | 0.040 max | 0.030 max | 20.0-22.0 | 23.5-25.5 | 6.0-7.0 | N 0.18-0.25, Cu 0.75 max |
Mechanical Properties
Mechanical properties of AL6XN slip-on flanges may vary with material form, heat treatment condition, section thickness and the governing specification. The values below are typical reference figures used for engineering review and quotation support. Final certified results shall follow the actual test reports, MTC and project inspection requirements.
| Grade | Tensile Strength | Yield Strength | Elongation | Hardness | Density |
|---|---|---|---|---|---|
| AL-6XN / UNS N08367 | 690 MPa min | 310 MPa min | 35% min | 95 HRB max | 8.24 g/cm3 |
| 1.4529 Equivalent | 680 MPa min | 300 MPa min | 30% min | 220 HB max | 8.20 g/cm3 |
Common Size Table
| Size Range | Pressure Class | Sealing Face | Material | Availability |
|---|---|---|---|---|
| DN15 – DN50 | Class 150 – 600 | RF | AL-6XN / UNS N08367 | Stock / Production |
| DN65 – DN300 | Class 150 – 1500 | RF / RTJ | AL-6XN / UNS N08367 | Stock / Production |
| DN350 – DN600 | Class 150 – 900 | RF / RTJ | AL-6XN / UNS N08367 | Production |
| DN700 – DN1500 | Class 150 – 600 | RF | AL-6XN / UNS N08367 | Made to Order |
Different Specifications Comparison
| Type | Description | Typical Use |
|---|---|---|
| ASME Slip-On RF | Raised face slip-on flange for standard process piping with fillet weld connection | Oil and gas, chemical and utility piping |
| ASME Slip-On RTJ | Ring type joint slip-on flange for higher integrity sealing in elevated pressure service | Refinery, offshore and critical hydrocarbon lines |
| EN 1092-1 Type 12 | European slip-on plate or hubbed type flange with PN rating and various facing options | Water treatment, power and process plants in EU-standard systems |
| JIS Slip-On Flange | JIS drilling and dimensions for marine, shipbuilding and industrial piping systems | Marine, shipyard and Asian regional projects |
Equivalent Standards and International Names
Slip-on flanges in AL6XN can be supplied to multiple international dimensional standards while the alloy designation may be referenced by UNS, EN or proprietary trade names. Exact material naming and flange drilling pattern should be confirmed at order stage to match the end-user specification, mating flange standard and corrosion service requirements.
| Standard / Region | Standard Code | Typical Grade / Equivalent |
|---|---|---|
| USA | ASME B16.5 | AL-6XN / UNS N08367 slip-on flange |
| Europe | EN 1092-1 | 1.4529 equivalent high-alloy austenitic stainless steel |
| Germany | DIN 2527 / 2566 | DIN drilling with 1.4529 equivalent on request |
| Japan | JIS B2220 | JIS slip-on flange in UNS N08367 equivalent material |
| China | GB/T 9119 | GB flange dimensions with AL-6XN / N08367 material |
Production Process Flow
SASA FLANGE controls each manufacturing stage for AL6XN slip-on flanges to ensure alloy integrity, dimensional accuracy and corrosion-resistant surface condition. Process records are maintained for traceability from raw material to final dispatch.
- 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 and rapid cooling as required for AL6XN | 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 AL-6XN / UNS N08367 alloy chemistry, especially chromium, nickel, molybdenum and nitrogen content that determine corrosion resistance. Test results are checked against the applicable material specification and purchase order requirements. This ensures each slip-on flange is produced from correct super austenitic stainless steel with full traceable mill records.
2. Mechanical Properties Testing
Mechanical property testing confirms tensile strength, yield strength, elongation and hardness of the flange material after required heat treatment. These tests help verify that the product meets the performance requirements for pressure piping service. Certified test results are linked to the heat number so buyers can review material compliance before shipment and installation.
3. Dimensional Inspection
Dimensional inspection covers outside diameter, bore size, flange thickness, bolt circle, bolt hole diameter, hub dimensions and facing geometry. Raised face height or RTJ groove details are checked according to ASME, EN, DIN, JIS or GB standard tolerances. This inspection ensures correct fit-up with mating flanges, proper gasket seating and trouble-free field assembly.
4. PMI Testing and Hydrostatic Testing
PMI testing is carried out using positive material identification equipment to confirm AL6XN alloy content and prevent material mix-up. Hydrostatic pressure testing can be arranged when project specifications require assembly or spool verification. SASA FLANGE also provides EN 10204 3.1 certificate, MTC, inspection reports and traceability documents for project QA and third-party review.
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
AL6XN slip-on flanges are selected where conventional stainless steels may not provide sufficient resistance to chlorides, seawater, acidic media or mixed industrial fluids. Their combination of high corrosion resistance, practical installation and broad standard compatibility makes them suitable for critical piping systems in demanding industrial environments.
| Industry | Typical Applications | Why This Product Is Used |
|---|---|---|
| Oil and Gas | Offshore seawater injection lines, topside utility piping, produced water systems | Excellent resistance to chloride pitting and crevice corrosion in marine environments |
| Chemical Processing | Acid transfer lines, brine service, bleach and aggressive chemical piping | High nickel and molybdenum content improves corrosion resistance in severe media |
| Power Generation | FGD systems, cooling water circuits, condensate and auxiliary process lines | Reliable performance under corrosive wet service and elevated operating demands |
| Water Treatment | Desalination plants, RO skid piping, seawater intake and discharge systems | Suitable for chloride-rich water where 316L may be insufficient |
| Marine and Offshore | Shipboard piping, offshore modules, ballast and firewater systems | Combines seawater resistance with easy installation and maintenance |
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 slip on flange AL6XN?
A: A slip on flange AL6XN is a slip-on type pipe flange made from AL-6XN super austenitic stainless steel, typically UNS N08367. The pipe slips into the flange bore and is fillet welded inside and outside. It is widely used where strong resistance to seawater, chlorides and aggressive chemical media is required in industrial piping systems.
Q: What materials are available for slip on flange AL6XN?
A: The main material is AL-6XN / UNS N08367, a super austenitic stainless steel with high chromium, nickel, molybdenum and nitrogen. Depending on project requirements, SASA FLANGE can also discuss equivalent high-alloy grades such as EN 1.4529 type material or other corrosion-resistant stainless and nickel alloy options for matching system performance.
Q: What pressure class is supported?
A: SASA FLANGE can supply AL6XN slip-on flanges in common ASME pressure classes from Class 150 to Class 1500, and in EN PN ratings from PN10 to PN100 depending on size, standard and project design. Larger diameters are usually supplied in lower pressure ratings, while smaller sizes are available in higher pressure configurations including RTJ faces.
Q: Can SASA FLANGE supply custom sizes?
A: Yes. SASA FLANGE supplies standard and non-standard AL6XN slip-on flanges with custom bore, drilling pattern, facing type, thickness and marking. We can manufacture to customer drawings or end-user specifications, including ASME, EN, DIN, JIS and GB dimensions, as well as special sealing faces and alloy verification requirements for project use.
Q: What certificate is provided?
A: SASA FLANGE provides EN 10204 3.1 material certificate with heat number traceability for AL6XN slip-on flanges. Supporting documentation can include MTC, chemical analysis, mechanical test results, dimensional inspection reports and PMI records. Hydrostatic testing or third-party inspection can also be arranged when required by project specifications or purchaser quality plans.
Contact Us
If you are looking for slip on flange al6xn 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
