Description
Product Detail
Incoloy threaded flanges are forged flanges manufactured with tapered female pipe threads, allowing connection to threaded pipe or fittings without welding. They are selected for services requiring strong resistance to oxidation, carburization, chloride environments and elevated temperatures. Commonly used in chemical plants, offshore systems, heat exchangers, boiler piping and instrument lines, these flanges provide reliable sealing performance and convenient installation where welding is impractical or restricted.
SASA FLANGE supplies Incoloy threaded flanges in standard and customized dimensions according to ASME, EN, DIN, JIS and GB requirements. Each batch can be provided with chemical analysis, mechanical testing, dimensional inspection and PMI verification. EN 10204 3.1 certification, heat number identification and full traceability are maintained throughout production to support critical industrial projects and export documentation requirements.
- ✓Product Name: Incoloy Threaded Flanges
- ✓Material Grade: Incoloy 800, 800H, 800HT, 825
- ✓Product Type: Forged Threaded Pipe Flange
- ✓Main Feature: High temperature and corrosion resistance with weld-free threaded installation
- ✓Applications: Oil and gas, chemical processing, power plants, offshore piping, water treatment
Product Parameters
| Product Name | Incoloy Threaded Flanges |
| Material Grade | Incoloy 800 / 800H / 800HT / 825, ASTM B564 UNS N08800 / N08810 / N08811 / N08825 |
| Material Type | Nickel-Iron-Chromium Alloy |
| Product Form | Forged and CNC machined threaded flange |
| Size Range | DN15 – DN600 (1/2 inch – 24 inch) |
| Pressure Class | Class 150 – 2500 / PN10 – PN100 |
| Sealing Face | RF, FF, RTJ |
| Surface Treatment | Machined, pickled, passivated, marked and protected with anti-rust packing |
| 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 chemical composition below is for general reference for common Incoloy grades used in threaded flange production. Exact composition depends on the selected alloy grade, applicable ASTM specification and mill test certificate. Final values supplied by SASA FLANGE follow approved raw material standards and corresponding EN 10204 3.1 documentation.
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | Other |
|---|---|---|---|---|---|---|---|---|---|
| Incoloy 825 % | 0.05 max | 0.50 max | 1.00 max | 0.03 max | 0.03 max | 19.5-23.5 | 38.0-46.0 | 2.5-3.5 | Cu 1.5-3.0, Ti 0.6-1.2, Fe balance |
Mechanical Properties
Mechanical properties shown are typical minimum values for commonly specified Incoloy grades used for flange forgings. Actual test results may vary according to grade, forging reduction ratio, heat treatment condition and section thickness. Certified values are confirmed by mechanical testing and recorded in the material test certificate for each heat.
| Grade | Tensile Strength | Yield Strength | Elongation | Hardness | Density |
|---|---|---|---|---|---|
| Incoloy 800 | 500 MPa min | 205 MPa min | 30% min | ≤ 170 HB | 7.94 g/cm3 |
| Incoloy 825 | 585 MPa min | 240 MPa min | 30% min | ≤ 200 HB | 8.14 g/cm3 |
Common Size Table
| Size Range | Pressure Class | Sealing Face | Material | Availability |
|---|---|---|---|---|
| DN15 – DN50 | Class 150 – 600 | RF | Incoloy 800 / 825 | Stock / Production |
| DN65 – DN300 | Class 150 – 1500 | RF / RTJ | Incoloy 800H / 800HT / 825 | Stock / Production |
| DN350 – DN600 | Class 150 – 2500 | RF / RTJ | Incoloy 800H / 825 | Production |
| DN700 – DN1500 | Class 150 – 900 | RF | Incoloy 800 / 825 | Made to Order |
Different Specifications Comparison
| Type | Description | Typical Use |
|---|---|---|
| ASME Threaded Flange | Forged flange with NPT threaded bore manufactured to ASME B16.5 dimensions | High-pressure utility, process and instrument piping |
| EN Threaded Flange | Threaded flange produced to EN 1092-1 dimensional and pressure rating requirements | European industrial plants and replacement projects |
| RF Threaded Flange | Raised face threaded flange designed for use with ring gaskets or spiral wound gaskets | General chemical, oil and gas and power applications |
| RTJ Threaded Flange | Ring type joint threaded flange for high-pressure service with metal ring gasket seating | Refinery, offshore and high-temperature critical service |
Equivalent Standards and International Names
Threaded flange dimensions, pressure classes and naming conventions vary by market. SASA FLANGE can manufacture Incoloy threaded flanges to major international standards and customer drawings. Equivalent grade descriptions may differ by region, but the supplied alloy chemistry and mechanical properties are controlled according to the selected material specification and certified raw material source.
| Standard / Region | Standard Code | Typical Grade / Equivalent |
|---|---|---|
| USA | ASME B16.5 | ASTM B564 UNS N08800 / N08810 / N08811 / N08825 |
| Europe | EN 1092-1 | Alloy 800 / 800H / 800HT / 825 threaded flange to EN dimensions |
| Germany | DIN 2565 / 2566 | Werkstoff equivalent nickel alloy threaded flange by customer requirement |
| Japan | JIS B2220 | Incoloy 800 / 825 equivalent threaded flange for JIS drilling |
| China | GB/T 9119 | NS1101 / NS142 equivalent nickel alloy threaded flange by project specification |
Production Process Flow
SASA FLANGE controls the full production route for Incoloy threaded flanges, from raw material verification to final machining and inspection. Process control is important for nickel alloy forgings to ensure dimensional precision, thread accuracy, material integrity and traceable quality documentation.
- 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 annealing as required by alloy grade | Temperature and holding time control |
| Machining | Sealing face, internal threads, bolt holes and 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 on raw material and, when required, on finished forgings to confirm conformity with the specified Incoloy grade. Key alloying elements such as nickel, chromium, molybdenum, copper and titanium are verified against applicable ASTM requirements. This process helps ensure corrosion resistance, high-temperature performance and consistency with the material test certificate.
2. Mechanical Properties Testing
Mechanical testing verifies that the forged flange material meets specified tensile strength, yield strength, elongation and hardness requirements. Test samples are taken in accordance with the relevant material specification and heat treatment condition. These checks confirm that Incoloy threaded flanges have the required strength and ductility for pressure service, thermal cycling and demanding industrial operating environments.
3. Dimensional Inspection
Dimensional inspection covers outside diameter, thickness, bore, thread accuracy, bolt hole circle, bolt hole diameter and sealing face geometry. For raised face and RTJ designs, the profile and machining finish are carefully checked to match standard tolerances. This inspection ensures fit-up compatibility with mating flanges, threaded pipe connections and specified gasket systems in field installation.
4. PMI Testing and Hydrostatic Testing
Positive Material Identification is available to verify alloy grade and prevent mixed materials in critical projects. Hydrostatic or pressure-related inspection can be arranged according to project scope and applicable standards for assembled items or special requirements. SASA FLANGE provides EN 10204 3.1 certificate, inspection reports, heat number traceability and other supporting documentation for export 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
Incoloy threaded flanges are used in systems where corrosion resistance, oxidation resistance and elevated temperature strength are important. Their threaded design is preferred for smaller pipe sizes, maintenance service, hazardous areas and locations where welding must be minimized. They are widely selected for aggressive media, high-temperature utility lines and process piping across multiple industries.
| Industry | Typical Applications | Why This Product Is Used |
|---|---|---|
| Oil and Gas | Instrument connections, chemical injection lines, utility piping, offshore topside systems | Provides corrosion resistance and threaded assembly where welding is limited or maintenance access is needed |
| Chemical Processing | Acid service lines, reactor auxiliaries, heat transfer systems, chlorides-containing process piping | Incoloy alloys offer excellent resistance to corrosion, scaling and aggressive chemical media |
| Power Generation | Boiler auxiliary piping, superheater support systems, high-temperature service connections | Good mechanical stability and oxidation resistance at elevated temperatures |
| Water Treatment | Desalination skids, brine handling lines, chemical dosing systems | Suitable for chloride-bearing environments and long service life requirements |
| Marine and Offshore | Seawater utility systems, fire water lines, platform process modules | Combines nickel alloy corrosion resistance with convenient threaded installation in compact spaces |
Why Choose SASA FLANGE?
- ✓Professional manufacturer of Threaded 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 an Incoloy threaded flange?
A: An Incoloy threaded flange is a forged nickel alloy flange with a female threaded bore that connects directly to threaded pipe without welding. It is mainly used in small to medium pipe sizes where corrosion resistance, high-temperature performance and easy installation are required. These flanges are commonly supplied with raised face or ring type joint sealing surfaces.
Q: What materials are available for Incoloy threaded flanges?
A: SASA FLANGE commonly supplies Incoloy 800, 800H, 800HT and 825 threaded flanges. These materials are produced from certified nickel-iron-chromium alloy forgings in accordance with applicable ASTM specifications such as ASTM B564. Material selection depends on service temperature, corrosion conditions, pressure class and project standards specified by the customer.
Q: What pressure class is supported?
A: Incoloy threaded flanges are typically available in ASME Class 150, 300, 600, 900, 1500 and 2500, depending on size and design standard. EN and DIN pressure ratings such as PN10 to PN100 can also be supplied for project requirements. For high-pressure service, RTJ facing and precise machining are available on request.
Q: Can SASA FLANGE supply custom sizes?
A: Yes. SASA FLANGE can manufacture custom threaded flanges according to drawings or project specifications, including non-standard outside diameter, thickness, drilling pattern, thread form, sealing face and special alloy grade. Custom machining for RF, FF or RTJ faces, as well as special markings and third-party inspection requirements, can also be arranged.
Q: What certificate is provided?
A: SASA FLANGE can provide EN 10204 3.1 material certificate with heat number traceability for Incoloy threaded flanges. Supporting documents may include chemical analysis, mechanical test reports, dimensional inspection records and PMI results. Additional documentation, including third-party witness inspection and project-specific quality dossiers, can be arranged based on customer requirements.
Contact Us
If you are looking for incoloy threaded 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
