PVDF Stub End Flange
A PVDF Stub End Flange is a pipe fitting made from Polyvinylidene Fluoride (PVDF) used in conjunction with a lap joint flange to connect PVDF pipes in a flanged piping system. PVDF Stub End Flange is a durable and chemically resistant piping component designed to facilitate easy connection between PVDF pipes and other flanged fittings. This PVDF stub end flange is widely used in corrosive environments such as chemical processing, oil & gas treatment, semiconductor manufacturing, and pharmaceutical systems. It is typically used in conjunction with a backing flange and allows for easy installation and removal of pipe sections without disturbing the rest of the piping system.
The PVDF Stub End Flange provides a removable and reusable flange connection. The stub end is welded or fused to the pipe, while the lap joint flange slides over it to ensure a corrosion-resistant, leak-proof joint, and that is suitable for high-purity, chemical, and industrial piping systems.
- Chemical Resistance
- Low Maintenance Requirement
- Low Thermal Conductivity
- Long Service Life
- Easy Installation
- Corrosion Resistance
PVDF Stub End Flange Details
- d – Outer Diameter of Pipe (mm)
- DN – Nominal Diameter (in mm)
- PN – Pressure Nominal (in bar)
- d3 – Bolt Circle Diameter (PCD)
- b – Flange Thickness
- H – Total Height of the Flange
- Z – Thread Depth or Socket Depth
- d5 – Outer Diameter of the Flange
| d | DN | PN | d3 | b | H | Z | d5 |
| 20 | 15 | 16 | 27 | 7 | 20 | 6 | 45 |
| 25 | 20 | 16 | 34 | 9 | 22 | 6 | 58 |
| 32 | 25 | 16 | 41 | 10 | 25 | 6 | 68 |
| 40 | 32 | 16 | 50 | 11 | 27 | 6 | 78 |
| 50 | 40 | 16 | 61 | 12 | 30 | 6 | 88 |
| 63 | 50 | 16 | 76 | 14 | 34 | 6 | 102 |
| 75 | 65 | 16 | 90 | 16 | 38 | 7 | 122 |
| 90 | 80 | 16 | 108 | 17 | 44 | 8 | 138 |
| 110 | 100 | 16 | 131 | 18 | 50 | 8 | 158 |
| Parameter | Details |
| Product Type | Stub End Flange (Lap Joint Type) |
| Material | Polyvinylidene Fluoride (PVDF) |
| Manufacturing Method | Injection moulded |
| Design Type | Stub end (used with backing flange – loose flange) |
| Connection Type | Butt welding / Socket welding (depending on design) |
| Sealing Type | Flat Face (FF) / Raised Face (RF) |
| Available Sizes | DN15 to DN300 (½″ to 12″) |
| Pressure Rating | PN10 to PN16 (10–16 bar) |
| Operating Temperature | -20°C to +120°C (up to ~140°C max) |
| Density (Specific Gravity) | ~1.75 – 1.78 g/cm³ (typical PVDF) |
| Tensile Strength | ~35 – 50 MPa (grade dependent) |
| Modulus of Elasticity | ~1000 – 2000 MPa |
| Thermal Conductivity | Low (~0.19–0.20 W/m·K) |
| Coefficient of Expansion | ~1.2 × 10⁻⁴ /K |
| Chemical Resistance | Excellent (acids, alkalis, solvents) |
| Surface Finish | Smooth internal surface (low friction, low scaling) |
| Color | Natural white / translucent |
| UV Resistance | Excellent (no aging under UV exposure) |
| Standards Compliance | ASTM D3222, DIN 8077/8078, ISO 10931 |
| Compatibility | Works with PVDF, metal, or plastic backing flanges |
| Applications | Chemical processing, water treatment, pharma, semiconductor |
Excellent Chemical Resistance: Resistant to a broad range of acids, bases, and solvents.
Corrosion-Free Performance: Ideal for aggressive and corrosive environments.
Easy Installation and Maintenance: Designed to be used with backing flanges for efficient assembly and disassembly.
High Thermal Stability: Can perform reliably in elevated temperature environments.
Smooth Internal Surface: Minimizes pressure loss and prevents scaling or buildup.
| Temperature (°C) | PN16 System (SDR 21) | PN20 System (SDR 17) |
| 20°C | 16 bar | 20 bar |
| 30°C | 14 bar | 17 bar |
| 40°C | 12 bar | 15 bar |
| 50°C | 10 bar | 13 bar |
| 60°C | 8 bar | 11 bar |
| 80°C | 5–6 bar | 7–8 bar |
| 100°C | 3–4 bar | 5 bar |
| 120°C | 1–2 bar | 2–3 bar |
Custom Product Manufacturing Available
If you are searching for customized product designs that meet your requirements, don’t worry. Petron Thermoplast also offers custom product manufacturing services to meet the unique needs of various industries. Work with our expert engineers to create custom designs suited for your application.
Applications of PVDF Stub End Flange
Process Industry
High Purity Applications
Electronic Industry
Electrical Industry
Semi-conductors Industry
Pharmaceutical Industry
Solar power panels
Sugar Industry
Paper & Pulp Industry
Nuclear Power Industry
Automotive Industry
DI water plants
Why Choose Petron Thermoplast?
Petron Thermoplast has been a leading name in the chemical industry. We are offering certified, durable, and reliable PVDF Stub End Flange solutions for all kinds of oil, gas, fluid, and chemical systems. You can worry free investing in Petron Thermoplast’s PVDF Stub End Flange, ensuring the performance, longevity, and peace of mind.
