Description
Product Detail
Inconel lapped joint flanges are loose backing flanges used together with a lap joint stub end, allowing the flange to rotate freely for easier bolt hole alignment during installation. Compared with weld neck or slip on designs, this type is preferred where pipelines require frequent dismantling, cleaning or replacement. Inconel and nickel alloy grades provide excellent resistance to chlorides, acids, oxidation and elevated temperatures, making these flanges suitable for chemical processing, offshore piping, power plants, marine systems and aggressive fluid handling.
SASA FLANGE supplies Inconel lapped joint flanges in standard and customized dimensions to ASME, EN, DIN, JIS and GB requirements. Each order can be supported with chemical analysis, mechanical testing, dimensional inspection, PMI testing, sealing face verification, EN 10204 3.1 certificate and full heat number traceability to meet demanding project and end-user specifications.
- ✓Product Name: Inconel Lapped Joint Flanges
- ✓Material Grade: ASTM B564 UNS N06600, N06625, N08825, N10276
- ✓Product Type: Lap Joint Flange / Loose Backing Flange for use with Stub End
- ✓Main Feature: Rotating flange design for easy alignment, strong corrosion resistance and high-temperature service capability
- ✓Applications: Oil and gas, chemical processing, marine, desalination, power generation and corrosive process piping
Product Parameters
| Product Name | Inconel Lapped Joint Flanges |
| Material Grade | ASTM B564 UNS N06600, N06625, N08825, N10276 |
| Material Type | Nickel Alloy / Inconel / Corrosion Resistant Alloy |
| Product Form | Forged flange, machined flange, loose flange for lap joint assembly |
| Size Range | DN15 – DN1500 (1/2 inch – 60 inch) |
| Pressure Class | Class 150 – 2500 / PN10 – PN100 |
| Sealing Face | RF, FF, RTJ, custom machined face as per mating stub end design |
| Surface Treatment | Natural machined, pickled, passivated, export protective 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 reference based on a common Inconel grade used for lapped joint flanges. Final chemical composition depends on the selected alloy grade, applicable ASTM specification and mill test certificate. SASA FLANGE verifies raw material identity and chemistry before production to ensure conformity with project requirements.
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | Other |
|---|---|---|---|---|---|---|---|---|---|
| UNS N06625 | 0.10 max | 0.50 max | 0.50 max | 0.015 max | 0.015 max | 20.0-23.0 | 58.0 min | 8.0-10.0 | Nb+Ta 3.15-4.15, Fe 5.0 max, Al 0.40 max, Ti 0.40 max |
Mechanical Properties
Mechanical properties of Inconel lapped joint flanges vary according to alloy grade, product form, heat treatment condition and section thickness. The values below are typical reference data for commonly used nickel alloys. Actual test results are subject to the approved material standard and will be shown on the mill certificate and inspection documents.
| Grade | Tensile Strength | Yield Strength | Elongation | Hardness | Density |
|---|---|---|---|---|---|
| UNS N06600 | 550 MPa min | 240 MPa min | 30% min | 195 HB max | 8.47 g/cm3 |
| UNS N06625 | 827 MPa min | 414 MPa min | 30% min | 220 HB max | 8.44 g/cm3 |
Common Size Table
| Size Range | Pressure Class | Sealing Face | Material | Availability |
|---|---|---|---|---|
| DN15 – DN50 | Class 150 – 600 | RF | UNS N06600 / N06625 | Stock / Production |
| DN65 – DN300 | Class 150 – 1500 | RF / RTJ | UNS N06625 / N08825 | Stock / Production |
| DN350 – DN600 | Class 150 – 2500 | RF / RTJ | UNS N06625 / N10276 | Production |
| DN700 – DN1500 | Class 150 – 900 | RF | UNS N06625 / N08825 | Made to Order |
Different Specifications Comparison
| Type | Description | Typical Use |
|---|---|---|
| ASME Lap Joint Flange | Loose backing flange used with lap joint stub end to ASME B16.5 or B16.47 dimensions | Process piping, offshore lines and systems requiring easy dismantling |
| EN Lap Joint Flange | Loose flange manufactured to EN 1092-1 dimensional and drilling requirements | European industrial plants, water, chemical and utility systems |
| Raised Face Lap Joint | Machined raised face style used with compatible stub end and gasket arrangement | General industrial pressure service |
| Ring Type Joint Lap Joint | RTJ style machined for higher pressure sealing applications where specified | Refinery, high-pressure hydrocarbon and critical process service |
Equivalent Standards and International Names
Inconel lapped joint flanges can be supplied to multiple international flange standards depending on project location and piping design. While dimensional standards differ by region, equivalent nickel alloy material grades can be selected to meet corrosion and temperature requirements. Final grade designation should always be confirmed against the requested standard, pressure class and service condition.
| Standard / Region | Standard Code | Typical Grade / Equivalent |
|---|---|---|
| USA | ASME B16.5 | ASTM B564 UNS N06600, N06625, N08825 |
| Europe | EN 1092-1 | Nickel alloy loose flange in equivalent Ni-Cr-Mo grades per project specification |
| Germany | DIN 2527 / 2566 | DIN loose flange dimensions with Inconel 625 / Alloy 825 equivalent materials |
| Japan | JIS B2220 | JIS drilling with UNS N06625 or equivalent nickel alloy grade |
| China | GB/T 9119 | GB flange dimensions with ASTM B564 N06600 / N06625 materials |
Production Process Flow
SASA FLANGE controls the full manufacturing route of Inconel lapped joint flanges from raw material verification to final packing. Strict process monitoring is especially important for nickel alloys to maintain dimensional accuracy, material integrity and traceable quality records.
- 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 stress relief as applicable | 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 composition inspection is performed to verify that the nickel alloy conforms to the specified grade such as UNS N06600 or N06625. Raw material certificates are checked and, when required, laboratory analysis is reviewed against ASTM limits for key elements including nickel, chromium, molybdenum, carbon, sulfur and niobium.
2. Mechanical Properties Testing
Mechanical testing confirms that the flange material meets required tensile strength, yield strength, elongation and hardness values. Test results depend on alloy grade and heat treatment condition. SASA FLANGE reviews mill data and can coordinate additional testing for project-specific requirements to ensure suitability for pressure and temperature service.
3. Dimensional Inspection
Each Inconel lapped joint flange is checked for outside diameter, thickness, bore, bolt circle, bolt hole size, number of holes and facing dimensions according to the relevant standard. Sealing face finish and fit-up with the stub end are also verified to ensure proper assembly, interchangeability and reliable field installation.
4. PMI Testing and Hydrostatic Testing
PMI testing is used to confirm positive material identification of the nickel alloy before shipment, reducing the risk of grade mix-up in critical service. Hydrostatic testing can be arranged where project scope requires assembled pressure verification. EN 10204 3.1 certificate, inspection records and traceability documents are supplied with the order.
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
Inconel lapped joint flanges are used in piping systems where corrosion resistance, temperature stability and convenient disassembly are required. Their loose flange design reduces alignment time during installation, while the nickel alloy material provides long service life in aggressive media, marine atmospheres and demanding process conditions across global industrial sectors.
| Industry | Typical Applications | Why This Product Is Used |
|---|---|---|
| Oil and Gas | Offshore process lines, produced water systems, sour service and high-chloride piping | Offers strong resistance to corrosion and allows easier maintenance with rotating flange alignment |
| Chemical Processing | Acid transfer lines, reactor connections, solvent systems and aggressive media piping | Nickel alloy material withstands corrosive chemicals and elevated temperatures |
| Power Generation | Boiler auxiliary systems, FGD units, emission control and high-temperature process piping | Provides oxidation resistance, material stability and reliable sealing performance |
| Water Treatment | Desalination plants, seawater intake and brine handling lines | Performs well in chloride-rich environments and supports repeated dismantling |
| Marine and Offshore | Shipboard piping, FPSO modules, seawater cooling and firewater systems | Combines seawater corrosion resistance with easy assembly in restricted installation areas |
Why Choose SASA FLANGE?
- ✓Professional manufacturer of Lap Joint Flange 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 an Inconel lapped joint flange?
A: An Inconel lapped joint flange is a loose backing flange used together with a lap joint stub end. The flange can rotate around the stub end, making bolt hole alignment easier during installation. It is commonly selected for corrosive or high-temperature service where pipelines need frequent dismantling for inspection, maintenance or cleaning.
Q: What materials are available for Inconel lapped joint flanges?
A: SASA FLANGE commonly supplies nickel alloy grades such as ASTM B564 UNS N06600, N06625, N08825 and N10276 for lapped joint flanges. Material selection depends on the process medium, chloride content, temperature and pressure rating. Other special nickel alloys can also be produced according to project specifications and customer drawings.
Q: What pressure class is supported?
A: Inconel lapped joint flanges can be supplied in ASME Class 150, 300, 600, 900, 1500 and 2500, as well as EN and DIN pressure ratings such as PN10 to PN100 depending on flange dimensions and design requirements. Higher class products are generally produced to order after confirming size, facing type and material grade.
Q: Can SASA FLANGE supply custom sizes?
A: Yes. SASA FLANGE can manufacture custom Inconel lapped joint flanges based on customer drawings or special project requirements. We support non-standard drilling, special bore sizes, custom sealing faces, larger diameters, matching stub end dimensions and selected nickel alloy grades to suit different piping standards and installation conditions.
Q: What certificate is provided?
A: SASA FLANGE provides EN 10204 3.1 material certificate for Inconel lapped joint flanges, together with mill test certificate, dimensional inspection records and heat number traceability. PMI testing is available for alloy verification, and additional inspection or hydrostatic testing can be arranged when requested by the project specification or end user.
Contact Us
If you are looking for inconel lapped joint 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
