Description
Product Detail
Hastelloy threaded flanges are forged or machined flanges with female pipe threads that connect directly to threaded pipe without welding. They are widely used in corrosive chemical lines, acid handling systems, instrumentation connections, small-bore process piping and maintenance-sensitive plants where hot work should be minimized. Key advantages include excellent corrosion resistance, reliable assembly, easy replacement and suitability for moderate to high pressure service depending on design standard.
SASA FLANGE supplies Hastelloy threaded flanges in standard and customized sizes with precision machining for NPT, BSPT or BSPP threads. Each order can be supported by chemical analysis, mechanical testing, dimensional inspection, PMI testing, EN 10204 3.1 certificate and full heat number traceability. Custom drilling, facing, special marking and project documentation are available for international industrial buyers.
- ✓Product Name: Hastelloy Threaded Flanges
- ✓Material Grade: Hastelloy C276, C22, B2, B3
- ✓Product Type: Forged Threaded Flanges / Screwed Flanges
- ✓Main Feature: Outstanding corrosion resistance with non-welded threaded connection
- ✓Applications: Chemical processing, offshore, scrubber systems, power plants, water treatment and instrumentation piping
Product Parameters
| Product Name | Hastelloy Threaded Flanges |
| Material Grade | Hastelloy C276, Hastelloy C22, Hastelloy B2, Hastelloy B3, UNS N10276, UNS N06022, UNS N10665, UNS N10675 |
| Material Type | Nickel-based corrosion-resistant 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 | Pickling, passivation, machined finish, protective oil on machined surfaces |
| 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 reference for a typical Hastelloy C276 threaded flange material. Final composition shall conform to the applicable ASTM or ASME alloy specification, purchase order requirements and the mill test certificate. Exact values may vary slightly by heat, forging practice and product form while remaining within standard limits.
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | Other |
|---|---|---|---|---|---|---|---|---|---|
| Hastelloy C276 | 0.01 max | 0.08 max | 1.00 max | 0.04 max | 0.03 max | 14.5-16.5 | Balance | 15.0-17.0 | Fe 4.0-7.0, W 3.0-4.5, Co 2.5 max, V 0.35 max |
Mechanical Properties
Mechanical properties shown are typical minimum room-temperature values for common Hastelloy grades used in threaded flanges. Actual results may vary according to alloy grade, heat treatment condition, section thickness and forging process. Where required, SASA FLANGE can provide supporting test reports and MTC data for supplied material lots.
| Grade | Tensile Strength | Yield Strength | Elongation | Hardness | Density |
|---|---|---|---|---|---|
| Hastelloy C276 | 690 MPa min | 283 MPa min | 40% min | 100 HRB max | 8.89 g/cm3 |
| Hastelloy C22 | 690 MPa min | 310 MPa min | 45% min | 95 HRB max | 8.69 g/cm3 |
Common Size Table
| Size Range | Pressure Class | Sealing Face | Material | Availability |
|---|---|---|---|---|
| DN15 – DN50 | Class 150 – 600 | RF | Hastelloy C276 / C22 | Stock / Production |
| DN65 – DN300 | Class 150 – 1500 | RF / RTJ | Hastelloy C276 / C22 | Stock / Production |
| DN350 – DN600 | Class 150 – 2500 | RF / RTJ | Hastelloy C276 / B3 | Production |
| DN700 – DN1500 | Class 150 – 900 | RF | Hastelloy C276 / C22 | Made to Order |
Different Specifications Comparison
| Type | Description | Typical Use |
|---|---|---|
| ASME Threaded Flange | Female threaded flange manufactured to ASME B16.5 dimensions with NPT threads | Oil and gas, chemical plants, skid piping and maintenance-friendly systems |
| EN Threaded Flange | Internally threaded flange produced to EN 1092-1 dimensions with customer-specified thread form | European process piping, utility systems and retrofit projects |
| Raised Face Threaded Flange | Threaded flange with raised face gasket seating area for standard spiral wound or soft gaskets | General corrosive service and moderate to high pressure lines |
| RTJ Threaded Flange | Threaded flange with ring type joint groove for high-integrity metallic sealing | High-pressure hydrocarbon and critical chemical service |
Equivalent Standards and International Names
Threaded flange dimensions can be manufactured to multiple international standards, while the alloy grade is generally supplied to ASTM or ASME nickel alloy specifications. Equivalent grade naming may vary by region, but SASA FLANGE verifies chemical composition, mechanical properties and traceability to ensure the supplied Hastelloy material matches project and end-user requirements.
| Standard / Region | Standard Code | Typical Grade / Equivalent |
|---|---|---|
| USA | ASME B16.5 | Hastelloy C276 / UNS N10276 threaded flange |
| Europe | EN 1092-1 | 2.4819 alloy flange to EN dimensions |
| Germany | DIN 2527 / 2566 | NiMo16Cr15W alloy equivalent dimensional execution |
| Japan | JIS B2220 | Hastelloy C276 equivalent alloy flange to JIS drilling |
| China | GB/T 9119 | NS3304 / UNS N10276 equivalent flange dimensions |
Production Process Flow
Manufacturing control is essential for Hastelloy threaded flanges because nickel alloy machining, thread accuracy and sealing face quality directly affect service performance in corrosive applications. SASA FLANGE manages each stage from raw material verification to final packing.
- 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, threads and dimensions | Dimensional accuracy, thread gauge and surface finish |
| Inspection | Final inspection before shipment | Dimension, surface, PMI, hydrostatic |
Product Inspection
1. Chemical Composition Inspection
Chemical composition inspection verifies that the nickel alloy flange matches the specified Hastelloy grade such as C276 or C22. Samples are checked by spectrometer or laboratory analysis for key elements including nickel, chromium, molybdenum, tungsten and iron. This confirms compliance with applicable alloy standards and supports reliable corrosion performance in aggressive service conditions.
2. Mechanical Properties Testing
Mechanical testing confirms that supplied Hastelloy flange material meets required tensile strength, yield strength, elongation and hardness values. Testing is performed according to relevant ASTM or ASME requirements using representative material from the production lot. These checks help ensure the flange can withstand assembly loads, pressure service and operating stresses in demanding industrial environments.
3. Dimensional Inspection
Dimensional inspection covers outside diameter, thickness, hub profile where applicable, bolt circle, bolt hole size, face finish and thread accuracy. For threaded flanges, thread form and depth are checked using calibrated gauges to ensure proper fit-up with mating pipe. Precise inspection helps avoid leakage, alignment problems and installation delays at the project site.
4. PMI Testing and Hydrostatic Testing
PMI testing is carried out to confirm the supplied flanges are the correct Hastelloy alloy and not mixed with stainless steel or other nickel materials. Hydrostatic or pressure-related verification can be arranged according to project scope and applicable standards. SASA FLANGE provides EN 10204 3.1 certificate, heat number traceability and supporting inspection records with shipment.
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
Hastelloy threaded flanges are selected for piping systems exposed to strong acids, chlorides, oxidizing media and mixed corrosive process streams. Their threaded design is useful where welding must be avoided, maintenance access is important or small-bore lines require practical assembly. They are widely used in process industries requiring corrosion resistance, traceability and dependable pressure sealing.
| Industry | Typical Applications | Why This Product Is Used |
|---|---|---|
| Oil and Gas | Chemical injection lines, sour service utility systems, analyzer connections | Excellent corrosion resistance and threaded assembly for maintenance-friendly small bore piping |
| Chemical Processing | Acid transfer lines, chlorination units, reactor auxiliaries, scrubber systems | Hastelloy resists aggressive chemicals, chlorides and oxidizing media better than many stainless steels |
| Power Generation | FGD systems, flue gas cleaning, sampling and dosing lines | Good resistance to wet corrosive environments and reliable sealing in auxiliary process piping |
| Water Treatment | Chemical dosing systems, desalination skids, specialty media handling | Used where high-alloy corrosion resistance is required and welding is undesirable |
| Marine and Offshore | Offshore chemical service lines, seawater-related specialty systems, platform skids | Performs well in severe corrosive conditions and supports quick threaded installation or replacement |
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 a Hastelloy threaded flange?
A: A Hastelloy threaded flange is a non-weld flange with internal pipe threads that allows connection to externally threaded pipe or fittings. It is commonly used in corrosive service, small-bore piping and installations where welding is restricted or undesirable. Typical materials include Hastelloy C276 and C22 for strong resistance to acids, chlorides and oxidizing chemicals.
Q: What materials are available for Hastelloy threaded flanges?
A: SASA FLANGE commonly supplies Hastelloy C276, Hastelloy C22, Hastelloy B2 and Hastelloy B3 threaded flanges depending on media, temperature and project specification. Popular UNS designations include N10276 and N06022. Material selection depends on corrosion conditions such as reducing acids, oxidizing chemicals, chloride content and service temperature in the piping system.
Q: What pressure class is supported?
A: Hastelloy threaded flanges are typically supplied in ASME Class 150, 300, 600, 900, 1500 and 2500, with PN-rated versions available for EN and DIN systems. The practical pressure rating depends on flange standard, size, alloy grade, thread design and operating temperature. SASA FLANGE can recommend a suitable class according to service conditions and code requirements.
Q: Can SASA FLANGE supply custom sizes?
A: Yes. SASA FLANGE can supply custom threaded flanges with special drilling, non-standard thickness, raised face or RTJ facing, and thread forms including NPT, BSPT and BSPP. Customized dimensions can be produced according to drawings, mating equipment data or project specifications. Special alloy grades, marking requirements and documentation packages are also available upon request.
Q: What certificate is provided?
A: SASA FLANGE provides EN 10204 3.1 material certificate with heat number traceability for Hastelloy threaded flanges. Depending on order requirements, documentation can include mill test certificate, PMI report, dimensional inspection report, chemical analysis and mechanical test results. Additional third-party inspection and project-specific records can also be arranged before shipment when required.
Contact Us
If you are looking for hastelloy 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
