Description
Product Detail
PVDF slip on flanges are thermoplastic pipe flanges that slide over the pipe outside diameter and are then joined by welding, bonding or stub-end backing arrangements depending on the system design. They offer excellent resistance to acids, alkalis, salts, oxidizing chemicals and UV exposure, while maintaining smooth internal flow characteristics. These flanges are commonly used in chemical plants, water treatment units, semiconductor process lines, marine corrosion service and clean utility systems.
SASA FLANGE supplies PVDF slip on flanges in standard and customized dimensions with strict quality control for industrial projects. Available services include chemical analysis of raw resin lots, mechanical property verification, dimensional inspection, pressure capability review, PMI testing for metallic backing components where applicable, EN 10204 3.1 certificate and full batch traceability to ensure reliable installation and long service life.
- ✓Product Name: PVDF Slip On Flanges
- ✓Material Grade: PVDF Natural, PVDF Conductive
- ✓Product Type: Thermoplastic Slip-On Flange
- ✓Main Feature: Excellent corrosion resistance, lightweight construction and clean service suitability
- ✓Applications: Chemical processing, water treatment, semiconductor utilities, marine and corrosive fluid piping
Product Parameters
| Product Name | PVDF Slip On Flanges |
| Material Grade | PVDF Natural, PVDF Conductive, virgin PVDF resin grades |
| Material Type | Polyvinylidene Fluoride (Thermoplastic) |
| Product Form | Molded or machined slip-on flange |
| Size Range | DN15 – DN600 (1/2 inch – 24 inch) |
| Pressure Class | PN6 – PN16 / ANSI Class 150 drilling on request |
| Sealing Face | FF, RF flat thermoplastic face, serration-free machined face |
| Surface Treatment | Smooth machined finish, cleaned surface, deburred edges |
| Standard | ASME B16.5 drilling, EN 1092-1, DIN, JIS, GB or customer specification |
| Inspection | Raw Material Verification, Mechanical Test, PMI for backing parts if applicable, Dimensional, Hydrostatic system test support |
| 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 a reference for PVDF resin used in flange manufacturing. Exact formulation may vary slightly by resin producer, grade type and conductivity requirement. Final supplied material data follows the applicable raw material specification, production batch record and material test certificate issued for the order.
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | Other |
|---|---|---|---|---|---|---|---|---|---|
| Content % | 38.0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | H 4.0, F 58.0 |
Mechanical Properties
Mechanical properties of PVDF slip on flanges depend on resin grade, molding or machining route, service temperature and flange thickness. The values below are typical reference data at ambient temperature for industrial PVDF materials. Actual performance should be confirmed against project design conditions, operating pressure and the approved material certificate.
| Grade | Tensile Strength | Yield Strength | Elongation | Hardness | Density |
|---|---|---|---|---|---|
| PVDF Natural | 45 MPa | 38 MPa | 20% min | 80 Shore D | 1.78 g/cm3 |
| PVDF Conductive | 40 MPa | 34 MPa | 10% min | 78 Shore D | 1.80 g/cm3 |
Common Size Table
| Size Range | Pressure Class | Sealing Face | Material | Availability |
|---|---|---|---|---|
| DN15 – DN50 | PN10 – PN16 | FF | PVDF Natural / Conductive | Stock / Production |
| DN65 – DN150 | PN10 – PN16 | FF / RF flat face | PVDF Natural / Conductive | Stock / Production |
| DN200 – DN300 | PN6 – PN10 | FF | PVDF Natural | Production |
| DN350 – DN600 | PN6 | FF | PVDF Natural | Made to Order |
Different Specifications Comparison
| Type | Description | Typical Use |
|---|---|---|
| PVDF Slip On Flange | Thermoplastic flange that slips over pipe and is joined in non-metallic piping systems | Corrosive chemical and water treatment lines |
| PVDF Blind Flange | Solid flange used to close pipe ends, no bore opening | Line isolation, maintenance and testing points |
| PVDF Stub End with Backing Flange | Stub end provides wetted corrosion-resistant surface while backing ring carries bolt load | High purity and plastic piping systems |
| PVDF Lined Steel Flange | Steel flange with PVDF wetted lining for higher structural strength | Chemical service requiring corrosion resistance with metal support |
Equivalent Standards and International Names
PVDF slip on flanges are normally produced to thermoplastic piping dimensions and then drilled to match international metallic flange patterns for installation compatibility. Equivalent standards below refer mainly to bolt pattern and flange dimensions used in projects. Final selection should consider temperature derating, gasket style and the pressure capability of PVDF material.
| Standard / Region | Standard Code | Typical Grade / Equivalent |
|---|---|---|
| USA | ASME B16.5 | PVDF flange drilled to Class 150 pattern |
| Europe | EN 1092-1 | PVDF flange drilled to PN10 / PN16 pattern |
| Germany | DIN 2501 / DIN 2576 | PVDF flange drilled to DIN PN10 / PN16 |
| Japan | JIS B2220 | PVDF flange drilled to 5K / 10K pattern |
| China | GB/T 9119 | PVDF flange drilled to PN10 / PN16 pattern |
Production Process Flow
Manufacturing control for PVDF slip on flanges focuses on resin quality, dimensional precision, stress control and clean finishing. SASA FLANGE applies controlled processing and inspection to ensure flange fit-up, sealing reliability and traceable supply for corrosive service piping systems.
- 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 PVDF resin or machined stock shapes | Material batch record and traceability |
| Cutting / Forming | Compression molding, machining or cutting to required flange blank | Void control, shape accuracy and material integrity |
| Stress Relief | Controlled conditioning where required for machined thermoplastic parts | Temperature and time control to reduce internal stress |
| Machining | Machine bore, flange thickness, bolt circle and face finish | Dimensional accuracy and sealing face flatness |
| Inspection | Final inspection before shipment | Dimension, appearance, drilling, traceability and packing check |
Product Inspection
1. Chemical Composition Inspection
For PVDF slip on flanges, raw material verification is carried out against approved resin specifications and supplier batch data. Key polymer identity, resin grade and additive content for conductive versions are checked through incoming material records and production controls. This helps ensure the supplied flange material is suitable for chemical resistance and clean process service.
2. Mechanical Properties Testing
Mechanical testing is performed on representative PVDF material according to relevant plastic material test methods. Typical checks include tensile strength, yield behavior, elongation and hardness at ambient conditions. These tests confirm that the processed flange material meets the expected structural performance for bolted piping connections within the specified temperature and pressure range.
3. Dimensional Inspection
Each PVDF slip on flange is inspected for outer diameter, bore size, flange thickness, bolt circle, hole diameter, number of holes and face flatness. Visual examination also confirms clean machining, burr-free edges and proper sealing surface condition. Accurate dimensions are essential to ensure correct alignment with mating flanges and stable gasket compression in service.
4. PMI Testing and Hydrostatic Testing
PMI testing is available for metallic backing flanges or inserts when supplied as part of an assembly, while polymer material verification follows resin traceability controls. Hydrostatic testing is generally carried out at system or assembly level rather than on individual plastic flanges alone. SASA FLANGE can provide EN 10204 3.1 certificate, dimensional records and supporting inspection 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
PVDF slip on flanges are widely used in piping systems where strong corrosion resistance, clean internal surfaces and low contamination risk are required. They are especially suitable for aggressive chemical media, purified water and outdoor installations. Their light weight and compatibility with non-metallic piping make them a practical solution for many industrial plants.
| Industry | Typical Applications | Why This Product Is Used |
|---|---|---|
| Oil and Gas | Chemical injection skids, produced water treatment and analyzer utility lines | Good resistance to corrosive chemicals and lower installation weight |
| Chemical Processing | Acid transfer lines, alkali service, scrubber systems and dosing units | Excellent resistance to many aggressive media and long service life |
| Power Generation | Demineralized water, flue gas desulfurization auxiliaries and chemical feed systems | Suitable for corrosive utility service and clean water handling |
| Water Treatment | RO systems, dosing lines, chlorine service and ultrapure water distribution | Smooth bore, corrosion resistance and low contamination characteristics |
| Marine and Offshore | Seawater chemical dosing, corrosion-resistant utility piping and wash systems | Strong resistance to salt atmosphere, chemicals and outdoor exposure |
Why Choose SASA FLANGE?
- ✓Professional manufacturer of Slip-On 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 PVDF slip on flange?
A: A PVDF slip on flange is a thermoplastic flange designed to slide over a plastic pipe before joining and bolting to a mating flange. It is used in corrosive and clean service piping where metallic flanges may suffer chemical attack. PVDF offers strong chemical resistance, low contamination risk and good durability in outdoor and industrial environments.
Q: What materials are available for PVDF slip on flanges?
A: SASA FLANGE supplies PVDF slip on flanges in natural PVDF and conductive PVDF grades. Natural PVDF is widely used for chemical and purified water applications, while conductive PVDF is selected where static dissipation is required. We can also discuss related solutions such as PVDF lined steel flanges or matched backing flange assemblies for specific projects.
Q: What pressure class is supported?
A: PVDF slip on flanges are typically supplied in PN6 to PN16 ratings depending on size, wall thickness, design temperature and system configuration. ANSI Class 150 drilling can also be provided for compatibility with common piping layouts, but the actual working pressure must follow PVDF material derating rules and the project operating temperature requirements.
Q: Can SASA FLANGE supply custom sizes?
A: Yes. SASA FLANGE can produce custom PVDF slip on flanges according to drawings or project specifications, including special bore sizes, non-standard bolt drilling, custom outside diameters and sealing face details. We can also match ASME, EN, DIN, JIS or GB drilling patterns and support special material requests for conductive grades or assembled backing flange solutions.
Q: What certificate is provided?
A: SASA FLANGE can provide EN 10204 3.1 material certificate, raw material batch traceability, dimensional inspection reports and packing identification records for PVDF slip on flanges. For assemblies including metallic backing parts, PMI testing can be included. Hydrostatic testing is typically performed at assembled system level, and supporting inspection documents can be issued as required by the order.
Contact Us
If you are looking for pvdf slip on 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
