Description
Product Detail
Alloy 330 lap joint flanges are loose backing flanges designed to be used together with a lap joint stub end, allowing easy alignment, dismantling and replacement in piping systems that require corrosion resistance and reliable performance at elevated temperatures. Manufactured from UNS N08330 nickel-iron-chromium alloy, these flanges offer excellent oxidation resistance, thermal stability and good resistance to carburizing and nitriding atmospheres, making them suitable for petrochemical plants, thermal processing units, power systems and marine services.
SASA FLANGE supplies alloy 330 lap joint flanges in standard and customized dimensions according to ASME, EN, DIN, JIS and GB requirements. Each batch can be supported with chemical analysis, mechanical testing, dimensional inspection, PMI testing, EN 10204 3.1 certificate and full heat number traceability to meet strict project and end-user documentation requirements.
- ✓Product Name: Alloy 330 Lap Joint Flanges
- ✓Material Grade: UNS N08330 / Alloy 330
- ✓Product Type: Lap Joint Flange / Backing Flange for Stub End Assembly
- ✓Main Feature: Excellent high-temperature oxidation resistance, easy alignment and repeated dismantling
- ✓Applications: Petrochemical, heat treatment, power generation, marine, water treatment and process piping
Product Parameters
| Product Name | Alloy 330 Lap Joint Flanges |
| Material Grade | UNS N08330 / Alloy 330 |
| Material Type | High nickel heat-resistant alloy |
| Product Form | Forged or plate-machined lap joint flange |
| Size Range | DN15 – DN1500 (1/2 inch – 60 inch) |
| Pressure Class | Class 150 – 1500 / PN10 – PN100 |
| Sealing Face | Flat Face suitable for lap joint assembly with stub end; custom facing available per design |
| Surface Treatment | Machined, pickled, passivated, protective oil on machined surfaces 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 UNS N08330 / Alloy 330 lap joint flanges. Actual composition may vary slightly by mill source, product form and applicable specification. Final values shall conform to the approved material standard and the certified mill test certificate supplied with the order.
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | Other |
|---|---|---|---|---|---|---|---|---|---|
| Content % | 0.15 max | 1.50 max | 2.00 max | 0.030 max | 0.030 max | 17.0 – 20.0 | 34.0 – 37.0 | 0.75 max | Fe balance; N 0.40 – 0.80 |
Mechanical Properties
Mechanical properties of alloy 330 lap joint flanges depend on product form, heat treatment condition and section thickness. The values below are typical reference data used for engineering evaluation. Final tested values for supplied flanges will be shown on the material test report and may vary within the applicable specification limits.
| Grade | Tensile Strength | Yield Strength | Elongation | Hardness | Density |
|---|---|---|---|---|---|
| UNS N08330 / Alloy 330 Annealed | 655 MPa | 275 MPa | 35% min | 200HB max | 7.94 g/cm3 |
| UNS N08330 / Alloy 330 Forged Flange | 620 MPa | 240 MPa | 30% min | 217HB max | 7.94 g/cm3 |
Common Size Table
| Size Range | Pressure Class | Sealing Face | Material | Availability |
|---|---|---|---|---|
| DN15 – DN50 | Class 150 – 600 | Lap Joint Face | UNS N08330 / Alloy 330 | Stock / Production |
| DN65 – DN300 | Class 150 – 900 | Lap Joint Face | UNS N08330 / Alloy 330 | Stock / Production |
| DN350 – DN600 | Class 150 – 1500 | Lap Joint Face | UNS N08330 / Alloy 330 | Production |
| DN700 – DN1500 | Class 150 – 600 | Lap Joint Face | UNS N08330 / Alloy 330 | Made to Order |
Different Specifications Comparison
| Type | Description | Typical Use |
|---|---|---|
| ASME B16.5 Lap Joint Flange | Loose backing flange used with lap joint stub end for NPS 1/2 to 24 | Process piping, maintenance-friendly systems, corrosive service |
| ASME B16.47 Lap Joint Flange | Large diameter lap joint flange for NPS 26 to 60 with project-based drilling | Large pipelines, marine, water and bulk utility lines |
| EN 1092-1 Type 02 | European loose flange used with welding collar or stub end in DN sizes | Chemical plants, utility piping and European projects |
| DIN Lap Joint Flange | DIN loose flange configuration for collar-mounted assembly and easy rotation | Industrial retrofits, OEM systems and European maintenance applications |
Equivalent Standards and International Names
Lap joint flange dimensions are generally governed by international flange standards, while the alloy grade is specified separately by material standard or project requirement. For Alloy 330, buyers often reference UNS N08330 and request dimension compliance with ASME, EN, DIN, JIS or GB standards depending on plant design and regional approval requirements.
| Standard / Region | Standard Code | Typical Grade / Equivalent |
|---|---|---|
| USA | ASME B16.5 | UNS N08330 / Alloy 330 lap joint flange to ASME dimensions |
| Europe | EN 1092-1 | Loose flange in nickel alloy equivalent to UNS N08330 by project specification |
| Germany | DIN 2527 / 2566 | DIN loose flange with Alloy 330 material on special order |
| Japan | JIS B2220 | JIS drilling pattern with UNS N08330 or equivalent nickel alloy material |
| China | GB/T 9119 | GB flange dimensions with Alloy 330 / UNS N08330 on request |
Production Process Flow
SASA FLANGE applies controlled manufacturing procedures for alloy 330 lap joint flanges to ensure dimensional accuracy, material integrity and traceable quality for high-temperature and corrosive service applications.
- 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 required | 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 carried out to verify that the supplied flange material conforms to UNS N08330 requirements. Key alloying elements such as nickel, chromium, carbon, silicon and nitrogen are checked by spectrometer or laboratory analysis. This process ensures the alloy 330 lap joint flanges meet the specified heat-resistant and corrosion-resistant performance requirements.
2. Mechanical Properties Testing
Mechanical testing is performed according to applicable material standards or project specifications. Typical tests include tensile strength, yield strength, elongation and hardness verification. These tests confirm that the alloy 330 flanges provide adequate strength, ductility and stability for service in elevated-temperature piping systems and critical industrial installations.
3. Dimensional Inspection
Dimensional inspection covers outside diameter, inside diameter, flange thickness, bolt circle, bolt hole diameter, number of holes and overall facing geometry. Special attention is given to the lap joint seating dimensions to ensure correct fit with the mating stub end. Inspection is conducted using calibrated tools in line with ASME, EN, DIN, JIS or GB requirements.
4. PMI Testing and Hydrostatic Testing
Positive Material Identification is used to confirm the flange alloy grade before shipment, especially for nickel alloy orders where material mix-up must be prevented. Hydrostatic testing can be arranged for assembled piping components or where project requirements specify pressure verification. EN 10204 3.1 certificate, heat number traceability and inspection records are provided with supply.
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
Alloy 330 lap joint flanges are used in industrial piping systems where elevated temperature resistance, oxidation resistance and ease of maintenance are important. Their loose flange design allows fast alignment and convenient dismantling, while Alloy 330 provides stable performance in demanding thermal and corrosive operating environments.
| Industry | Typical Applications | Why This Product Is Used |
|---|---|---|
| Oil and Gas | Refinery heaters, hot process lines, sulfur recovery units | Offers high-temperature stability, corrosion resistance and easier maintenance with stub end assemblies |
| Chemical Processing | Acid service lines, hot gas ducts, reactor and transfer piping | Nickel-chromium alloy resists oxidation and supports repeated dismantling during maintenance |
| Power Generation | Boiler auxiliary lines, flue gas systems, thermal processing units | Performs well in elevated-temperature service and supports reliable flange alignment |
| Water Treatment | Specialized chemical dosing and thermal treatment systems | Useful where corrosion-resistant alloy construction and flexible flange installation are required |
| Marine and Offshore | Exhaust systems, utility piping, offshore process modules | Provides good resistance to harsh environments and simplifies installation in tight spaces |
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 alloy 330 lap joint flange?
A: An alloy 330 lap joint flange is a loose backing flange manufactured from UNS N08330 heat-resistant nickel alloy and used together with a lap joint stub end. It allows the flange to rotate for easy bolt alignment and simplifies dismantling. This design is widely used in systems that require corrosion resistance, elevated-temperature performance and easier maintenance.
Q: What materials are available for alloy 330 lap joint flanges?
A: The standard material is UNS N08330, commonly known as Alloy 330. For project requirements, SASA FLANGE can also discuss similar high-temperature nickel alloy materials, depending on design temperature, corrosion conditions and applicable standards. Material selection is confirmed by chemical analysis, PMI testing and EN 10204 3.1 certification before shipment.
Q: What pressure class is supported?
A: SASA FLANGE commonly supplies alloy 330 lap joint flanges in ASME Class 150, 300, 600, 900 and up to 1500 depending on size, design and material availability. EN and GB pressure ratings can also be manufactured for project-based applications. The final pressure class should be selected according to piping design code, operating conditions and service temperature.
Q: Can SASA FLANGE supply custom sizes?
A: Yes. SASA FLANGE can manufacture custom alloy 330 lap joint flanges based on drawings or project specifications. We support special dimensions, non-standard drilling, custom bore sizes, matched stub end assemblies and different international drilling standards. Custom machining for sealing geometry, thickness and large-diameter requirements is also available for EPC and OEM buyers.
Q: What certificate is provided?
A: Alloy 330 lap joint flanges can be supplied with EN 10204 3.1 material certificate, mill test certificate, heat number traceability and inspection reports. PMI testing, chemical analysis, mechanical testing and dimensional inspection records can be included as required. Additional third-party inspection support is available for major project, EPC and end-user documentation requirements.
Contact Us
If you are looking for alloy 330 lap 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
