Description
Product Detail
Blind flange PEEK lined products are solid flanges designed to close the end of a pipeline, nozzle or pressure vessel opening. By combining a high-strength forged metal body with a PEEK contact surface, insert or liner, they offer reliable shutoff, excellent dimensional stability, strong wear resistance and improved performance in corrosive or high-purity applications. They are widely used in chemical dosing lines, aggressive process media systems, offshore skids, water treatment units and selected high-temperature piping services.
SASA FLANGE supplies standard and customized blind flange PEEK configurations in accordance with ASME B16.5, ASME B16.47, EN 1092-1, DIN, JIS and GB requirements. Each order can be supported by chemical analysis, mechanical testing, dimensional inspection, PMI testing, sealing face verification, EN 10204 3.1 certificate and full heat number traceability from raw material to final delivery.
- ✓Product Name: Blind Flange PEEK Lined
- ✓Material Grade: Carbon Steel, Stainless Steel, Duplex, Alloy Steel with PEEK lining or insert
- ✓Product Type: Solid blind flange for pipeline end closure
- ✓Main Feature: Positive shutoff with enhanced corrosion resistance and chemically resistant PEEK wetted surface
- ✓Applications: Chemical processing, oil and gas skids, water treatment, power plants, marine and offshore systems
Product Parameters
| Product Name | Blind Flange PEEK Lined |
| Material Grade | ASTM A105, A350 LF2, A182 F304/F304L, F316/F316L, F321, F347, F51, F53, F11, F22 |
| Material Type | Forged carbon steel, stainless steel, duplex stainless steel, alloy steel with PEEK lining/insert |
| Product Form | Forged blind flange, plate machined blind flange, lined blind flange, insert type blind flange |
| Size Range | DN15 – DN1500 (1/2 inch – 60 inch) |
| Pressure Class | Class 150 – 2500 / PN6 – PN100 |
| Sealing Face | RF, FF, RTJ, TG, MFM |
| Surface Treatment | Anti-rust oil, painting, passivation, hot-dip galvanizing, machined sealing face protection |
| Standard | ASME B16.5, ASME B16.47, EN 1092-1, DIN 2527, 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 a representative reference for the commonly used stainless steel base grade ASTM A182 F316L in blind flange PEEK applications. Final flange body chemistry depends on the selected metal grade, while PEEK insert or liner material is specified separately. Actual composition shall comply with the applicable standard and confirmed mill test certificate.
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | Other |
|---|---|---|---|---|---|---|---|---|---|
| ASTM A182 F316L Body Material % | 0.03 max | 1.00 max | 2.00 max | 0.045 max | 0.030 max | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | N 0.10 max |
Mechanical Properties
Mechanical properties shown below are typical minimum values for common flange body materials used for blind flange PEEK products. Actual results may vary with grade, heat treatment condition, section thickness and standard requirement. PEEK liner or insert properties are evaluated separately from the forged metal body and do not replace the pressure-retaining flange requirements.
| Grade | Tensile Strength | Yield Strength | Elongation | Hardness | Density |
|---|---|---|---|---|---|
| ASTM A105 | 485 MPa min | 250 MPa min | 22% min | 187 HB max | 7.85 g/cm3 |
| ASTM A182 F316L | 485 MPa min | 170 MPa min | 30% min | 95 HRB max | 7.99 g/cm3 |
Common Size Table
| Size Range | Pressure Class | Sealing Face | Material | Availability |
|---|---|---|---|---|
| DN15 – DN50 | Class 150 – 600 | RF / FF | A105, F304L, F316L with PEEK insert | Stock / Production |
| DN65 – DN300 | Class 150 – 1500 | RF / RTJ | A105, LF2, F316L, F51 with PEEK lining | Stock / Production |
| DN350 – DN600 | Class 150 – 2500 | RF / RTJ | A105, F316L, F11, F22 with PEEK insert | Production |
| DN700 – DN1500 | Class 150 – 900 | RF | Carbon steel or stainless steel with custom PEEK design | Made to Order |
Different Specifications Comparison
| Type | Description | Typical Use |
|---|---|---|
| Standard Blind Flange | Solid metal blind flange without polymer lining | General pipeline isolation in oil, gas, water and utility systems |
| PEEK Lined Blind Flange | Blind flange with bonded or mechanically retained PEEK contact surface | Corrosive media, high-purity service and applications requiring reduced metal exposure |
| PEEK Insert Blind Flange | Forged blind flange using a PEEK insert on the wetted side or sealing area | Chemical dosing lines, skid packages and compact equipment connections |
| RTJ Blind Flange with PEEK Protection | High-pressure blind flange with RTJ geometry and engineered PEEK protection in non-critical wetted zones | Selected high-pressure chemical or offshore service subject to design review |
Equivalent Standards and International Names
Blind flange PEEK products are manufactured to the dimensional standards required by the project, while the base material grade is selected according to the service condition. Equivalent names may vary by region, especially for carbon steel and stainless steel flange bodies. Final compliance is based on drawing, pressure class, facing type and approved material specification.
| Standard / Region | Standard Code | Typical Grade / Equivalent |
|---|---|---|
| USA | ASME B16.5 / ASME B16.47 | A105, A350 LF2, A182 F304L, A182 F316L |
| Europe | EN 1092-1 | P250GH, C22.8, 1.4301, 1.4404, 1.4462 |
| Germany | DIN 2527 / 2566 | C22.8, 1.4541, 1.4571, 1.4462 |
| Japan | JIS B2220 | SFVC2A, SUS304, SUS316, SUS316L |
| China | GB/T 9119 | 20#, 16Mn, 0Cr18Ni9, 022Cr17Ni12Mo2, 2205 |
Production Process Flow
Manufacturing control is essential for blind flange PEEK products because both the pressure-retaining metal body and the engineered PEEK component must meet dimensional and service requirements. SASA FLANGE applies traceable process control from material selection to final inspection.
- 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 | Normalizing, tempering or annealing | 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 analysis is carried out on the flange body material to confirm compliance with the specified grade such as A105, F316L or duplex stainless steel. Positive identification of alloying elements helps ensure corrosion resistance, weld compatibility and pressure boundary reliability. Test results are recorded against the heat number and linked to the material certificate for full traceability.
2. Mechanical Properties Testing
Mechanical testing verifies that the flange body achieves the required tensile strength, yield strength, elongation and hardness according to the applicable forging or plate standard. Where required, impact testing for low-temperature service can also be arranged. This inspection confirms the blind flange has the structural integrity needed for line blanking and pressure containment.
3. Dimensional Inspection
Each blind flange is checked for outside diameter, thickness, bolt circle, bolt hole quantity, hole diameter, facing dimensions and overall flatness. Special attention is given to the sealing face and the fit of the PEEK lined or insert area. Inspection is performed according to ASME, EN, DIN, JIS, GB or approved customer drawings to ensure trouble-free installation.
4. PMI Testing and Hydrostatic Testing
PMI testing is available to confirm the alloy grade of stainless steel, duplex or high-alloy blind flanges before shipment. For project requirements, hydrostatic or seat integrity testing can be arranged on assembled or special lined configurations. SASA FLANGE supplies EN 10204 3.1 certificate, inspection records and heat number traceability to support international project documentation.
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
Blind flange PEEK products are selected where line end isolation is required together with improved chemical resistance, cleaner wetted surfaces or reduced direct media contact with metallic materials. They are used across process industries that demand dependable sealing, traceable materials and compatibility with aggressive fluids or specialized service environments.
| Industry | Typical Applications | Why This Product Is Used |
|---|---|---|
| Oil and Gas | Chemical injection skids, analyzer panels, produced water modules, offshore piping dead ends | Provides secure line blanking with engineered wetted surface protection in corrosive service |
| Chemical Processing | Acid and solvent transfer lines, dosing systems, reactor nozzles, maintenance isolation points | PEEK offers strong chemical resistance and low contamination risk for selected media |
| Power Generation | Sampling systems, auxiliary chemical lines, demineralized water equipment, shutdown isolation points | Reliable blind closure with stable performance in controlled temperature and pressure conditions |
| Water Treatment | RO skids, dosing pumps, filtration manifolds, maintenance blanks for treatment trains | Helps improve media compatibility and supports clean service applications |
| Marine and Offshore | Compact piping modules, seawater treatment packages, utility skids, topside process systems | Combines mechanical strength of forged flanges with enhanced resistance for harsh environments |
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
- ✓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 blind flange PEEK product?
A: A blind flange PEEK product is a solid flange used to close the end of a piping system, nozzle or valve connection, combined with a PEEK lined surface or insert for improved media resistance. The forged metal body carries the pressure load, while the PEEK component helps protect the wetted area in selected chemical, high-purity or corrosive applications.
Q: What materials are available for blind flange PEEK products?
A: SASA FLANGE can supply carbon steel, low-temperature carbon steel, stainless steel, duplex stainless steel and alloy steel blind flanges with PEEK lining or insert designs. Common grades include ASTM A105, A350 LF2, A182 F304L, F316L, F51, F11 and F22. Material selection depends on pressure class, temperature, fluid compatibility and project standard.
Q: What pressure class is supported?
A: Standard production covers ASME Class 150, 300, 600, 900, 1500 and 2500, as well as EN and DIN pressure ratings such as PN6 to PN100 depending on size and design. For PEEK lined or insert configurations, the final pressure-temperature rating must be reviewed against the flange body material, liner arrangement and actual service conditions.
Q: Can SASA FLANGE supply custom sizes?
A: Yes. SASA FLANGE can produce custom blind flange PEEK products according to customer drawings or project data sheets. We support non-standard drilling, special bolt patterns, custom sealing faces, RTJ machining, large diameters, special thicknesses and selected material combinations. Our engineering team reviews the metal body and PEEK design together to ensure manufacturability and service suitability.
Q: What certificate is provided?
A: Standard documentation includes EN 10204 3.1 material certificate for the flange body, heat number traceability, dimensional inspection records and material test reports. PMI testing can be supplied for alloy grades, and hydrostatic or special testing can be arranged when required by the project. Additional documentation can be prepared according to purchase order and inspection plan requirements.
Contact Us
If you are looking for blind flange peek 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
