Description
Product Detail
310 stainless steel threaded flanges are forged or machined flanges with female pipe threads, typically used to connect threaded pipes, valves and fittings without welding. Made from high-temperature stainless steel such as ASTM A182 F310 and F310S, they provide strong oxidation resistance, good corrosion performance and dependable service in moderate to high temperature piping systems. Typical uses include chemical plants, thermal equipment, boilers, utility lines and marine auxiliary systems.
SASA FLANGE supplies 310 stainless steel threaded flanges in standard and customized dimensions according to ASME, EN, DIN, JIS and GB requirements. Each batch can be supported by chemical analysis, mechanical testing, dimensional inspection and PMI testing. EN 10204 3.1 certification, marking verification and full heat number traceability are available to meet project, EPC and end-user documentation requirements.
- ✓Product Name: 310 Stainless Steel Threaded Flanges
- ✓Material Grade: ASTM A182 F310 / F310S, UNS S31000 / S31008
- ✓Product Type: Forged Threaded Flanges
- ✓Main Feature: High temperature oxidation resistance with threaded installation for non-welded piping connections
- ✓Applications: Chemical processing, power plants, furnace piping, marine utilities, water and industrial process lines
Product Parameters
| Product Name | 310 Stainless Steel Threaded Flanges |
| Material Grade | ASTM A182 F310, ASTM A182 F310S, UNS S31000, UNS S31008, EN 1.4841, 1.4845 |
| Material Type | Austenitic heat-resistant stainless steel |
| Product Form | Forged threaded flange / 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, natural machined finish, protective oil for shipment |
| 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 ASTM A182 F310/F310S threaded flanges. Actual composition may vary slightly by heat and standard requirement. Final values shall comply with the applicable material specification, customer order and corresponding mill test certificate for each supplied batch.
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | Other |
|---|---|---|---|---|---|---|---|---|---|
| F310 / F310S % | 0.08 / 0.08 max | 1.50 max | 2.00 max | 0.045 max | 0.030 max | 24.0 – 26.0 | 19.0 – 22.0 | 0.75 max | N 0.10 max, Fe balance |
Mechanical Properties
Mechanical properties of 310 stainless steel threaded flanges depend on grade designation, solution annealing condition and section thickness. The data below is a typical reference for ASTM A182 F310 and F310S. Final tested values shall be confirmed by the material test certificate and applicable forging standard requirements.
| Grade | Tensile Strength | Yield Strength | Elongation | Hardness | Density |
|---|---|---|---|---|---|
| ASTM A182 F310 | 515 MPa min | 205 MPa min | 30% min | 217 HB max | 7.9 g/cm3 |
| ASTM A182 F310S | 515 MPa min | 205 MPa min | 30% min | 217 HB max | 7.9 g/cm3 |
Common Size Table
| Size Range | Pressure Class | Sealing Face | Material | Availability |
|---|---|---|---|---|
| DN15 – DN50 | Class 150 – 600 | RF | ASTM A182 F310 / F310S | Stock / Production |
| DN65 – DN300 | Class 150 – 1500 | RF / RTJ | ASTM A182 F310 / F310S | Stock / Production |
| DN350 – DN600 | Class 150 – 2500 | RF / RTJ | ASTM A182 F310 / F310S | Production |
| DN700 – DN1500 | Class 150 – 900 | RF | ASTM A182 F310 / F310S | Made to Order |
Different Specifications Comparison
| Type | Description | Typical Use |
|---|---|---|
| ASME Threaded Flange | Female NPT threaded flange manufactured to ASME B16.5 dimensions for screwed pipe connection | Small to medium bore process piping where welding is restricted |
| EN Threaded Flange | Internally threaded stainless steel flange produced to EN 1092-1 dimensional requirements | European process plants, utilities and OEM equipment |
| Raised Face Threaded Flange | Threaded flange with raised sealing face for use with standard ring gaskets | General industrial service, chemical and utility lines |
| RTJ Threaded Flange | Threaded flange with ring type joint groove for higher pressure sealing performance | High-pressure lines in refining, petrochemical and power applications |
Equivalent Standards and International Names
310 stainless steel threaded flanges can be supplied to several international flange standards, while the material grade is matched to the nearest equivalent designation in each market. Dimensions, facing details and thread forms should always be verified during purchase, especially when converting between ASME, EN, DIN, JIS and GB systems.
| Standard / Region | Standard Code | Typical Grade / Equivalent |
|---|---|---|
| USA | ASME B16.5 | ASTM A182 F310 / F310S, UNS S31000 / S31008 |
| Europe | EN 1092-1 | 1.4841 / 1.4845 |
| Germany | DIN 2527 / 2566 | X15CrNiSi25-21 / X8CrNi25-21 |
| Japan | JIS B2220 | SUS310S |
| China | GB/T 9119 | 0Cr25Ni20 / 06Cr25Ni20 |
Production Process Flow
SASA FLANGE controls the full manufacturing route of threaded flanges from raw material verification to final marking and packing. Process parameters, machining accuracy, thread quality and traceability are monitored to ensure reliable fit-up and compliance with project specifications.
- 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 required heat treatment | Temperature and holding time control |
| Machining | Sealing face, bolt holes, threads 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 carried out to confirm the chromium, nickel, carbon, manganese, silicon, phosphorus and sulfur levels meet ASTM A182 F310 or F310S requirements. Positive laboratory analysis or spectrometer testing is used to verify the heat chemistry before production release, ensuring the supplied threaded flanges match the ordered stainless steel grade.
2. Mechanical Properties Testing
Mechanical testing is performed on representative material to verify tensile strength, yield strength, elongation and hardness in accordance with the applicable forging standard. This confirms that 310 stainless steel threaded flanges provide the required basic strength and ductility for pressure piping service, while maintaining consistency across each manufacturing heat and production lot.
3. Dimensional Inspection
Dimensional inspection includes outside diameter, thickness, hub dimensions, flange facing, bolt circle, bolt hole alignment and internal thread accuracy. For threaded flanges, thread profile and engagement are especially important to ensure correct fit with matching threaded pipe. Inspection is conducted against ASME, EN, DIN, JIS, GB or approved customer drawings.
4. PMI Testing and Hydrostatic Testing
PMI testing is available to verify the alloy grade of each flange using handheld XRF or equivalent equipment, which is important for mixed-material project control. Hydrostatic testing can be arranged when required by project specification or assembly condition. SASA FLANGE also provides EN 10204 3.1 certificate, inspection records and full heat number traceability.
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
310 stainless steel threaded flanges are selected for piping systems that require high-temperature oxidation resistance together with convenient screwed installation. They are commonly used where field welding is limited, maintenance access is important or hot service conditions require a heat-resistant stainless grade with reliable corrosion performance.
| Industry | Typical Applications | Why This Product Is Used |
|---|---|---|
| Oil and Gas | Instrument air, utility lines, threaded auxiliary piping and hot service small-bore systems | Provides corrosion resistance, elevated-temperature capability and easy installation without welding |
| Chemical Processing | Process piping, hot gas lines, reactor auxiliaries and transfer systems | 310 stainless steel resists oxidation and many chemical atmospheres at higher temperatures |
| Power Generation | Boiler auxiliary lines, thermal equipment piping and heat recovery systems | Suitable for elevated-temperature service and maintenance-friendly threaded connections |
| Water Treatment | Dosing skids, threaded stainless pipelines and utility process connections | Offers clean stainless construction and convenient assembly for smaller pipe systems |
| Marine and Offshore | Engine room utilities, offshore modules and corrosion-exposed threaded stainless lines | Good corrosion resistance and simplified installation in restricted maintenance areas |
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 310 stainless steel threaded flange?
A: A 310 stainless steel threaded flange is a forged or machined flange with internal pipe threads used to connect threaded pipe and components without welding. It is made from heat-resistant stainless steel such as ASTM A182 F310 or F310S and is typically used in elevated-temperature services, utility piping, chemical systems and maintenance-access areas.
Q: What materials are available for 310 stainless steel threaded flanges?
A: The main materials are ASTM A182 F310 and F310S, corresponding to UNS S31000 and S31008. Equivalent grades such as EN 1.4841, 1.4845, JIS SUS310S and comparable GB grades can also be supplied depending on project requirements. SASA FLANGE can provide standard or customized material selection with PMI verification and full traceability.
Q: What pressure class is supported?
A: 310 stainless steel threaded flanges are commonly supplied in ASME Class 150, 300, 600, 900, 1500 and 2500 depending on size and design requirement. EN and DIN pressure ratings such as PN10, PN16, PN25, PN40, PN64 and PN100 are also available. Final pressure rating should match the dimensional standard and service condition.
Q: Can SASA FLANGE supply custom sizes?
A: Yes. SASA FLANGE can supply custom threaded flanges based on drawings or project specifications, including non-standard drilling, special facing, custom thread type, special thickness and alternate stainless grades. We support ASME, EN, DIN, JIS and GB dimensions, and can manufacture project-specific items for OEM, EPC and maintenance applications.
Q: What certificate is provided?
A: SASA FLANGE can provide EN 10204 3.1 material certificate together with mill test certificate, dimensional inspection report and marking traceability. PMI testing records are available on request, and hydrostatic testing can be arranged when required by the order or specification. Full heat number traceability is maintained throughout production and shipment.
Contact Us
If you are looking for 310 stainless steel 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
