PPH Flange
A PPH Flange (Polypropylene Homopolymer Flange) is a mechanical piping component used to connect pipes, valves, pumps, and other equipment in a piping system. It provides a secure, leak-proof joint by bolting two flanges together with a gasket placed between them. PPH flanges are made from polypropylene homopolymer (PPH), which offers excellent chemical resistance, high strength, and good thermal stability, making them suitable for corrosive and industrial fluid handling applications.
A PPH Flange (Polypropylene Homopolymer Flange) is a piping component used to connect pipes, valves, or equipment in a system.. PPH flanges are known for their excellent chemical resistance, durability, and suitability for corrosive fluid applications.It comes in a variety of shapes and sizes, and is easy to mix. PPH Flange and Pipe Fittings are quality-checked against a number of industry-standard specifications.
- Chemical Resistance
- Low Maintenance Requirement
- Low Thermal Conductivity
- Long Service Life
- Easy Installation
- Corrosion Resistance
PPH Flange Details
Size (Inch) → Nominal Pipe Size (in inches)
ID → Inner Diameter
OD → Outer Diameter
WT → Wall Thickness
SL → Socket Length
H → Height
L → Length
PCD → Pitch Circle Diameter
| Size (Inch) | ID (mm) | OD (mm) | WT (mm) | SL (mm) | H (mm) |
| ½” | 21.64 | 29.10 | 3.73 | 22.23 | 42 |
| ¾” | 26.97 | 34.79 | 3.91 | 25.40 | 58 |
| 1″ | 33.78 | 42.88 | 4.55 | 28.58 | 66 |
| 1¼” | 42.55 | 52.25 | 4.85 | 31.75 | 80 |
| 1½” | 48.72 | 58.88 | 5.08 | 34.93 | 90 |
| 2″ | 60.78 | 71.86 | 5.54 | 38.10 | 115 |
| 2½” | 73.56 | 87.58 | 7.01 | 44.45 | 132 |
| 3″ | 89.50 | 113.74 | 7.62 | 47.63 | 150 |
| 4″ | 114.99 | 132.11 | 8.56 | 57.15 | 182 |
| 6″ | 153.88 | 168.10 | 7.11 | 77.25 | 250 |
| Parameter | Details |
| Product Type | PPH Flange (Stub End / Blind / Slip-on) |
| Material | Polypropylene Homopolymer (PPH) |
| Construction Type | Injection molded / machined |
| Connection Type | Flanged (with backing ring & gasket) |
| Jointing Method | Butt fusion / Socket fusion + bolting |
| Standard Compliance | DIN / ANSI / ISO standards |
| Size Range | DN15 to DN315 (½″ to 12″+) |
| Extended Size Range | Up to DN600 (custom industrial sizes) |
| Pressure Rating | PN10 / PN16 (10–16 bar) |
| Operating Temperature | 0°C to +100°C (short-term up to 110°C) |
| Color | Light Grey / Natural / Beige |
| Density | ~0.90 – 0.91 g/cm³ |
| Tensile Strength | ≥ 25 MPa |
| Water Absorption | Very low (~0.01%) |
| Thermal Conductivity | ~0.22 W/m·K |
| Chemical Resistance | Excellent (acids, alkalis, salts) |
| Corrosion Resistance | 100% corrosion-free (no rust or scaling) |
| UV Resistance | Good (UV-stabilized options available) |
| Surface Finish | Smooth internal surface (low friction loss) |
| Weight | Lightweight (≈30% lighter than metal flanges) |
| Impact Strength | Moderate to high (depends on grade) |
| Thermal Stability | Good high-temperature resistance |
| Leakage Control | Tight sealing with gasket & bolting system |
| Maintenance | Low maintenance, reusable and easy to install |
| Design Feature | Rotatable backing ring for easy alignment |
| Applications | Chemical plants, water treatment, pharma, effluent systems |
1. Excellent Chemical Resistance
- Highly resistant to acids, alkalis, salts, and most chemicals
- Ideal for corrosive environments like chemical and wastewater industries
2. High Strength & Rigidity
- High strength-to-weight ratio
- More rigid compared to other polypropylene types
- Maintains structural stability under load
3. Lightweight Construction
- Much lighter than metal flanges (up to ~30% lighter)
- Easy handling, transportation, and installation
4. Corrosion & Rust Free
- Non-metallic material eliminates rusting issues
- Ensures longer service life in aggressive environments
5. High Temperature Resistance
- Suitable for moderate to high temperatures (approx. up to 100–110°C)
- Maintains performance without deformation
6. Excellent Sealing Performance
- Provides leak-proof joints when used with gaskets and bolts
- Ensures safe fluid handling in pipelines
7. Low Moisture Absorption
- Does not absorb water, preventing swelling or degradation
- Suitable for humid and wet conditions
8. Good Weldability & Fabrication
- Easily joined using fusion welding
- Supports strong, leak-proof connections
9. Impact & Stress Resistance
- Resistant to stress cracking and mechanical impact
- Absorbs vibration and reduces system damage
10. Smooth Internal Surface
- Low friction loss for fluid flow
- Improves system efficiency
11. Non-Toxic & Food Grade
- Safe for potable water and food applications
- Complies with hygiene standards
12. Electrical Insulation Properties
- High dielectric strength
- Suitable for electrical and insulating applications
| Nominal Pressure (PN) | Pressure Rating (bar) | Pressure Rating (MPa) | Typical Application |
| PN 6 | 6 bar | 0.6 MPa | Low-pressure systems (drainage, ventilation) |
| PN 10 | 10 bar | 1.0 MPa | Standard industrial piping, water treatment |
| PN 16 | 16 bar | 1.6 MPa | Medium pressure chemical & process lines |
| PN 20* | 20 bar | 2.0 MPa | Limited use (special systems) |
| PN 25* | 25 bar | 2.5 MPa | Rare for PPH, mostly metal flanges |
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.
Benefits of Using PPH Flange
1. Excellent Chemical Resistance
- Highly resistant to acids, alkalis, salts, and organic solvents
- Ideal for chemical, pharmaceutical, and effluent treatment industries
- Prevents corrosion and increases system life
2. Corrosion-Free Performance
- Unlike metal flanges, PPH does not rust, pit, or scale
- Suitable for aggressive and corrosive environments
3. Lightweight & Easy Handling
- Low density material makes it easy to transport and install
- Reduces labor and installation cost
4. High Strength & Durability
- High strength-to-weight ratio and rigidity
- Withstands pressure and mechanical stress effectively
5. Good Thermal Resistance
- Can operate at elevated temperatures (up to ~90–100°C)
- Maintains structural stability in heated applications
6. Excellent Sealing Performance
- Provides leak-proof connections when used with proper gaskets
- Ensures reliable pipeline joints
7. Low Moisture Absorption
- Does not absorb water → prevents swelling or degradation
- Maintains dimensional stability over time
8. Easy Fabrication & Installation
- Can be welded, machined, and fabricated easily
- Supports quick installation and maintenance
9. Long Service Life & Low Maintenance
- Resistant to wear, fatigue, and stress cracking
- Requires minimal maintenance over time
10. Non-Toxic & Food Grade
- Suitable for food and potable water applications
- Safe and hygienic material
11. Good Insulation Properties
- Excellent electrical and thermal insulation
- Useful in specialized industrial systems
Types of PPH Flange
1. Slip-On Flange
- Slides over the pipe and is then welded (butt or socket weld)
- Easy alignment and installation
- Common in low to medium pressure systems
2. Blind Flange
- Solid flange with no bore (hole)
- Used to close the end of a piping system
- Ideal for maintenance, inspection, or future expansion
3. Socket Weld Flange
- Pipe is inserted into a socket and welded
- Provides strong and leak-proof joints
- Suitable for small diameter, high-pressure pipelines
4. Threaded (Screwed) Flange
- Has internal threads to connect with threaded pipes
- No welding required
- Used in low-pressure and non-critical applications
5. Lap Joint Flange (Loose Flange)
- Used with a stub end
- Flange is free to rotate for easy alignment
- Ideal for systems requiring frequent dismantling
6. Weld Neck Flange
- Long tapered hub for smooth stress distribution
- Butt-welded to the pipe
- Suitable for high-pressure and high-temperature applications
7. Backing Ring Flange
- Used with thermoplastic piping like PPH
- Provides support to stub ends
- Common in plastic piping systems
8. Plate Flange
- Flat, simple design without a hub
- Economical option
- Used in low-pressure applications
Applications of PPH 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?
In modern piping engineering, double-joint PPH Flange have become a standard feature in oil, gas treatment, chemical, and industrial fluid systems. Petron Thermoplast is a trusted manufacturer and supplier of PPH Flange designed for reliable flow control, corrosion resistance, and long-term performance in industrial and utility piping systems. Our PPH Flange combine quality materials, precision engineering, and practical design to meet diverse application needs.
