Description
Product Detail
310 stainless steel blind flange is a non-bored flange used to close the end of a pipe, nozzle or valve connection. Compared with standard stainless grades, 310 and 310S offer higher chromium and nickel content for improved oxidation resistance, scaling resistance and strength at elevated temperatures. These flanges are suitable for petrochemical heaters, thermal processing lines, exhaust systems, power plants, offshore modules and aggressive high-temperature service.
SASA FLANGE supplies 310 stainless steel blind flanges in standard and custom dimensions according to ASME, EN, DIN, JIS, GB and project drawings. Documentation and inspection scope are confirmed per order and may include chemical analysis, mechanical testing, dimensional inspection, PMI, sealing-face verification, EN 10204 3.1 documentation and heat-number traceability when specified.
- ✓Product Name: 310 Stainless Steel Blind Flange
- ✓Material Grade: ASTM A182 F310 / F310S, UNS S31000 / S31008, EN 1.4841 / 1.4845
- ✓Product Type: Blind Flange
- ✓Main Feature: Excellent high-temperature oxidation resistance, solid end closure, reliable sealing face machining
- ✓Applications: Furnace systems, chemical plants, power stations, marine exhaust lines, high-temperature piping
Product Parameters
| Product Name | 310 Stainless Steel Blind Flange |
| Material Grade | ASTM A182 F310, F310S, UNS S31000, UNS S31008, EN 1.4841, EN 1.4845 |
| Material Type | Heat-resistant austenitic stainless steel forging or plate-machined material |
| Product Form | Blind flange, forged blind flange, plate blind flange, custom machined blind flange |
| Size Range | DN15 – DN1500 (1/2 inch – 60 inch) |
| Pressure Class | Class 150 – 2500 / PN10 – PN100 |
| Sealing Face | RF, FF, RTJ, TG, MFM |
| 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 chemical composition below is for reference for 310 series stainless steel blind flanges. Actual composition may vary slightly by grade such as F310 or F310S and shall comply with the applicable ASTM or EN standard. Final values are confirmed by mill test certificate, PMI verification and order-specific material documentation.
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | Other |
|---|---|---|---|---|---|---|---|---|---|
| F310 / S31000 | 0.25 max | 1.50 max | 2.00 max | 0.045 max | 0.030 max | 24.00 – 26.00 | 19.00 – 22.00 | 0.75 max | N 0.10 max |
| F310S / S31008 | 0.08 max | 1.50 max | 2.00 max | 0.045 max | 0.030 max | 24.00 – 26.00 | 19.00 – 22.00 | 0.75 max | N 0.10 max |
Mechanical Properties
Mechanical properties shown here are typical reference values for 310 and 310S stainless steel in annealed condition. Actual test results may vary depending on raw material source, thickness, forging reduction, heat treatment and applicable standard. Certified values are supplied according to the material test certificate and project specification.
| Grade | Tensile Strength | Yield Strength | Elongation | Hardness | Density |
|---|---|---|---|---|---|
| F310 / S31000 | 515 MPa min | 205 MPa min | 40% min | 217 HB max | 7.9 g/cm3 |
| F310S / S31008 | 515 MPa min | 205 MPa min | 40% 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 | A182 F310 / F310S | Subject to order review |
| DN65 – DN300 | Class 150 – 1500 | RF / RTJ | A182 F310 / F310S | Subject to order review |
| DN350 – DN600 | Class 150 – 2500 | RF / RTJ | A182 F310 / F310S | Production |
| DN700 – DN1500 | Class 150 – 900 | RF | A182 F310 / F310S | Made to Order |
Different Specifications Comparison
| Type | Description | Typical Use |
|---|---|---|
| Raised Face Blind Flange | Standard blind flange with raised sealing face for gasket compression in common pressure service | General process piping, chemical plants, utilities |
| Flat Face Blind Flange | Flat sealing face design used with full-face gaskets and matching flat face equipment connections | Low-pressure water lines, cast iron valves, pump nozzles |
| RTJ Blind Flange | Blind flange with ring type joint groove for high-integrity sealing under high pressure and temperature | Refineries, offshore platforms, high-pressure hydrocarbon service |
| Custom Drilled Blind Flange | Non-standard bolt pattern, thickness or face machining according to project drawing | OEM equipment, replacement shutdown jobs, special plant modifications |
Equivalent Standards and International Names
310 stainless steel blind flanges can be manufactured to major international flange standards, while the material grade may be identified by ASTM, UNS, EN or regional designations. Final selection depends on service temperature, pressure rating, dimensional standard and end-user specification. SASA FLANGE can assist in matching equivalent grades across international project requirements.
| Standard / Region | Standard Code | Typical Grade / Equivalent |
|---|---|---|
| USA | ASME B16.5 / B16.47 | ASTM A182 F310 / F310S, UNS S31000 / S31008 |
| Europe | EN 1092-1 | 1.4841 / 1.4845 blind flange |
| Germany | DIN 2527 / 2566 | X15CrNi25-20 / X8CrNi25-21 |
| Japan | JIS B2220 | SUS310S |
| China | GB/T 9119 | 0Cr25Ni20 / 06Cr25Ni20 |
Production Process Flow
SASA FLANGE controls each production stage from raw material verification to final packing to ensure 310 stainless steel blind flanges meet dimensional accuracy, sealing performance and traceability requirements for industrial service.
- 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 controlled heat treatment 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
Raw material for 310 stainless steel blind flanges is checked by spectrometer or laboratory chemical analysis to verify chromium, nickel, carbon and other alloying elements against ASTM or EN requirements. This inspection confirms the correct heat-resistant stainless grade before production and supports full traceability through the mill certificate and internal quality records.
2. Mechanical Properties Testing
Mechanical testing is performed according to applicable standards and project requirements to confirm tensile strength, yield strength, elongation and hardness. These tests help verify that the forged or machined flange material provides suitable strength and ductility for pressure service, fabrication handling and thermal cycling in demanding industrial installations.
3. Dimensional Inspection
Each blind flange is inspected for outside diameter, thickness, bolt circle, hole quantity, hole diameter, hub profile if applicable and sealing face geometry. Raised face height, RTJ groove dimensions and flange flatness are checked carefully to ensure interchangeability with mating flanges and proper gasket seating during installation.
4. PMI Testing and Hydrostatic Testing
Positive Material Identification is available to confirm the flange grade as 310 or 310S and avoid mixed material risk in critical projects. Hydrostatic pressure testing can be arranged when required by specification or assembly condition. EN 10204 3.1 documentation, inspection reports and heat-number traceability can be supplied when specified and confirmed in the quotation.
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 blind flanges are used where pipeline ends, nozzles or spare connections must be securely closed under elevated temperature and corrosive conditions. Their high chromium and nickel content makes them suitable for thermal service, oxidation-prone environments and process systems requiring dependable sealing and traceable heat-resistant stainless materials.
| Industry | Typical Applications | Why This Product Is Used |
|---|---|---|
| Oil and Gas | Heater manifolds, flare lines, process shutdown blanks, offshore high-temperature piping | Provides secure end closure with good oxidation resistance and reliable pressure containment |
| Chemical Processing | Reactor connections, thermal oxidizer piping, hot gas lines, acid-related auxiliary systems | 310 stainless offers strong resistance to scaling and elevated-temperature corrosion |
| Power Generation | Boiler auxiliary systems, exhaust ducts, turbine support piping, heat recovery units | Suitable for thermal cycling service and elevated operating temperatures |
| Water Treatment | High-temperature dosing systems, thermal sludge treatment lines, specialty process skids | Used where standard stainless grades may be insufficient for heat exposure |
| Marine and Offshore | Exhaust systems, offshore utility modules, hot service piping and maintenance isolation points | Combines corrosion resistance, traceable quality and strong sealing performance |
Why Choose SASA FLANGE?
- ✓Professional manufacturer of Blind 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
- ✓Market-standard configurations are available subject to order review; delivery is discussed per specification, with the fastest confirmed lead time from 7 working 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 blind flange?
A: A 310 stainless steel blind flange is a solid flange without a bore, used to close the end of a piping system or equipment nozzle. It is manufactured from heat-resistant austenitic stainless steel with high chromium and nickel content, making it suitable for elevated temperature service, oxidation resistance and reliable sealing in industrial plants.
Q: What materials are available for 310 stainless steel blind flanges?
A: SASA FLANGE commonly supplies ASTM A182 F310 and F310S blind flanges, corresponding to UNS S31000 and S31008. Equivalent EN grades such as 1.4841 and 1.4845 can also be offered depending on project requirements. We can provide forged or plate-machined products according to ASME, EN, DIN, JIS, GB and customer drawings.
Q: What pressure class is supported?
A: 310 stainless steel blind flanges are available in ASME Class 150, 300, 600, 900, 1500 and 2500, as well as PN-rated EN and DIN dimensions such as PN10 to PN100. The actual maximum rating depends on flange standard, material grade, operating temperature and design code. SASA FLANGE can recommend the appropriate rating for your application.
Q: Can SASA FLANGE supply custom sizes?
A: Yes. SASA FLANGE can manufacture custom blind flanges based on customer drawings or project specifications, including non-standard outside diameter, thickness, bolt hole pattern, RTJ groove, raised face height and special machining requirements. We also support custom material sourcing, CNC drilling, face finish control and markings for shutdown replacements and OEM equipment.
Q: What certificate is provided?
A: EN 10204 3.1 material documentation with heat-number traceability can be provided when specified and confirmed for the order. Additional documentation can include mill test certificate, chemical analysis report, mechanical test results, dimensional inspection report and PMI record. Hydrostatic testing or third-party inspection can also be arranged according to project or end-user requirements.
Contact Us
If you are looking for 310 stainless steel blind flange 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
