Description
Product Detail
PVDF threaded flanges are internally threaded plastic flanges manufactured for connection to threaded plastic or lined piping systems where excellent chemical resistance, low contamination and corrosion-free performance are required. Compared with metallic flanges, PVDF offers strong resistance to acids, alkalis, chlorides and many organic chemicals, making these flanges suitable for chemical dosing lines, water treatment skids, semiconductor utilities and light industrial process systems.
SASA FLANGE supplies PVDF threaded flanges in standard and customized dimensions with precision-machined threads, flange drilling and sealing faces. Each order can be supported with raw material verification, chemical analysis of resin reference data, dimensional inspection, mechanical testing where specified, PMI testing for metallic inserts if applicable, EN 10204 3.1 certificate and full batch number traceability to ensure dependable project documentation.
- ✓Product Name: PVDF Threaded Flanges
- ✓Material Grade: Virgin PVDF, Natural PVDF, Glass-Filled PVDF
- ✓Product Type: Non-metallic threaded pipe flange
- ✓Main Feature: Excellent corrosion resistance, clean service suitability, lightweight construction
- ✓Applications: Chemical processing, water treatment, semiconductor utilities, marine and industrial fluid handling
Product Parameters
| Product Name | PVDF Threaded Flanges |
| Material Grade | Virgin PVDF, Natural PVDF, Pigmented PVDF, Glass-Filled PVDF |
| Material Type | Polyvinylidene Fluoride (PVDF) thermoplastic |
| Product Form | Threaded flange, full face or raised face style, machined from molded blank or plate |
| Size Range | DN15 – DN300 (1/2 inch – 12 inch) |
| Pressure Class | ASME Class 150 equivalent / PN10 – PN16 |
| Sealing Face | FF, RF |
| Surface Treatment | As-machined, cleaned, deburred, protective packing for transport |
| Standard | ASME B16.5 drilling, EN 1092-1 drilling, DIN, JIS, GB or customer specification |
| Inspection | Raw Material Verification, Dimensional Inspection, Visual Inspection, Thread Gauge Check, Hydrostatic Test on assembly if required |
| 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 standard PVDF resin used in flange production. Actual composition may vary by resin manufacturer, grade type and additive package. Final supplied material data follows applicable resin specification, internal quality records and the material test certificate or batch conformity documents provided with the order.
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | Other |
|---|---|---|---|---|---|---|---|---|---|
| Content % | 38.0-40.0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | F 58.0-62.0, trace stabilizers |
Mechanical Properties
Mechanical properties of PVDF threaded flanges depend on resin grade, molding or machining route, filler content, temperature and wall thickness. The values below are typical room-temperature reference data for commonly used PVDF materials and should be confirmed against the specific supplied grade for design and service verification.
| Grade | Tensile Strength | Yield Strength | Elongation | Hardness | Density |
|---|---|---|---|---|---|
| Virgin PVDF | 45-55 MPa | 38-45 MPa | 20% min | 75-85 Shore D | 1.76-1.79 g/cm3 |
| Glass-Filled PVDF | 55-70 MPa | 45-60 MPa | 3-8% min | 80-88 Shore D | 1.85-1.95 g/cm3 |
Common Size Table
| Size Range | Pressure Class | Sealing Face | Material | Availability |
|---|---|---|---|---|
| DN15 – DN50 | PN10 – PN16 | FF / RF | Virgin PVDF | Stock / Production |
| DN65 – DN150 | PN10 – PN16 | FF / RF | Virgin PVDF / Natural PVDF | Stock / Production |
| DN200 – DN300 | PN10 | FF | Virgin PVDF / Glass-Filled PVDF | Production |
| Custom up to DN300 | ASME Class 150 equivalent | FF / RF | PVDF to customer specification | Made to Order |
Different Specifications Comparison
| Type | Description | Typical Use |
|---|---|---|
| Standard PVDF Threaded Flange | Internally threaded flange for direct connection to threaded pipe or fitting | Chemical transfer lines and low-pressure utility piping |
| Full Face PVDF Threaded Flange | Flat full-face design with broad sealing area and full bolt coverage | Water treatment systems and plastic piping networks |
| Raised Face PVDF Threaded Flange | Machined raised seating area for gasketed bolted joints | Skid-mounted process equipment and compact chemical systems |
| Custom Drilled PVDF Threaded Flange | Non-standard bolt pattern, thickness or thread form per drawing | Replacement parts and OEM process equipment |
Equivalent Standards and International Names
PVDF threaded flanges are generally manufactured to dimensional drilling standards used in global piping systems rather than metallic material standards. Equivalent reference systems below indicate common flange drilling and dimensional compatibility. Material designation may be stated simply as PVDF, polyvinylidene fluoride, or by resin manufacturer grade name depending on project documents.
| Standard / Region | Standard Code | Typical Grade / Equivalent |
|---|---|---|
| USA | ASME B16.5 | PVDF threaded flange, Class 150 drilling equivalent |
| Europe | EN 1092-1 | PVDF flange, PN10 / PN16 drilling equivalent |
| Germany | DIN 2566 / DIN 2501 | PVDF threaded flange with DIN PN drilling |
| Japan | JIS B2220 | PVDF flange with 5K / 10K drilling as specified |
| China | GB/T 9119 | PVDF flange with PN series drilling |
Production Process Flow
SASA FLANGE controls PVDF threaded flange manufacturing from resin selection to final machining and inspection. Process stability is important for thread accuracy, flatness, bolt alignment and crack-free performance in corrosion-resistant 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 PVDF resin, molded blank or plate stock | Batch identification and material conformity |
| Cutting / Forming | Cut blank to size from molded or extruded stock | Blank dimensions and defect-free surface |
| Conditioning | Controlled stress-relief or conditioning when required | Flatness stability and internal stress control |
| Machining | Machine thread, sealing face, OD, ID and bolt holes | Thread accuracy, dimensional tolerance and face finish |
| Inspection | Final inspection before shipment | Dimension, appearance, bolt pattern, thread gauge, packing check |
Product Inspection
1. Chemical Composition Inspection
For PVDF threaded flanges, raw material verification is based on resin batch records, supplier conformity documents and reference composition data for PVDF polymer. SASA FLANGE checks incoming material identity, grade designation and batch consistency to ensure the supplied flange matches customer requirements for corrosion resistance, purity level and intended process service.
2. Mechanical Properties Testing
Mechanical property verification may include review of resin data sheets and, where specified, testing of representative material for tensile strength, yield behavior, elongation and hardness. This helps confirm that the selected PVDF grade is suitable for the required operating temperature, bolt loading and low-pressure piping duty in chemical and water systems.
3. Dimensional Inspection
Each PVDF threaded flange is inspected for outside diameter, thickness, bolt circle, bolt hole diameter, flange flatness, thread accuracy and sealing face geometry. Proper dimensional control is essential for leak-tight assembly with mating flanges, correct gasket compression and smooth installation on threaded plastic or lined piping systems.
4. PMI Testing and Hydrostatic Testing
Standard PMI by alloy analyzer is generally not applicable to pure PVDF polymer, but SASA FLANGE can perform material identity verification through batch control and resin documentation. Hydrostatic testing is typically conducted on assembled piping joints or flange assemblies when specified. EN 10204 3.1 certificate, dimensional reports and batch traceability documents are available for project supply.
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 threaded flanges are widely used in corrosive and clean-fluid piping systems where metallic corrosion, contamination or scaling must be minimized. Their lightweight construction and strong chemical resistance make them suitable for process plants, utility skids and compact threaded piping networks operating at moderate pressure and temperature.
| Industry | Typical Applications | Why This Product Is Used |
|---|---|---|
| Oil and Gas | Chemical injection skids, produced water treatment and sampling lines | Good corrosion resistance to aggressive chemicals in auxiliary low-pressure systems |
| Chemical Processing | Acid transfer, alkali dosing, scrubber lines and reagent systems | PVDF resists many corrosive media better than carbon steel and many lower-grade plastics |
| Power Generation | Demineralized water, chemical dosing and flue gas treatment auxiliaries | Non-metallic construction reduces corrosion and contamination in utility service |
| Water Treatment | RO skids, dosing units, chlorine-related service and ultrapure water systems | Clean internal surface and chemical durability support reliable fluid handling |
| Marine and Offshore | Corrosion-prone utility piping and onboard chemical handling systems | Lightweight and resistant to salt-laden environments and many cleaning chemicals |
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 PVDF threaded flange?
A: A PVDF threaded flange is a non-metallic flange made from polyvinylidene fluoride and machined with internal threads for connection to threaded piping or fittings. It is used in corrosive service where metal flanges may suffer attack or contamination. PVDF threaded flanges are common in chemical dosing, water treatment and clean utility systems operating at moderate pressure.
Q: What materials are available for PVDF threaded flanges?
A: SASA FLANGE can supply PVDF threaded flanges in virgin PVDF, natural PVDF and selected glass-filled PVDF grades depending on strength, purity and service requirements. Virgin and natural PVDF are preferred for corrosive and cleaner service, while reinforced grades may be used for improved stiffness in specific industrial applications subject to design review.
Q: What pressure class is supported?
A: PVDF threaded flanges are typically used in lower-pressure plastic piping systems and are commonly supplied in PN10 to PN16 ratings or ASME Class 150 equivalent drilling patterns. Actual allowable pressure depends on flange size, wall thickness, temperature, gasket type and the connected piping system, so final selection should be confirmed against the service conditions.
Q: Can SASA FLANGE supply custom sizes?
A: Yes. SASA FLANGE can produce custom PVDF threaded flanges according to drawings or sample dimensions, including non-standard bolt drilling, special thread forms, custom thickness, full-face or raised-face design and matching to ASME, EN, DIN, JIS or GB drilling patterns. Special colors, marked identification and assembly-related machining can also be arranged on request.
Q: What certificate is provided?
A: SASA FLANGE can provide EN 10204 3.1 certificate, material conformity documents, dimensional inspection reports and batch traceability records for PVDF threaded flanges. For projects requiring additional quality assurance, we can support raw material verification, assembly hydrostatic testing where applicable and documentation aligned with customer purchase order and technical specification requirements.
Contact Us
If you are looking for pvdf 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
