PPH Coupler
A PPH (Polypropylene Homopolymer) Coupler is a pipe fitting used to connect two pipes of the same diameter in a straight line, ensuring a secure and leak-proof joint in a piping system.The PPH Coupler is one of the most basic (affordable) PPH Pipe fittings. They are a tiny part that permanently joins or “couples” one part to another. They can connect pipe to pipe as well as pipe to the fitting.
A PPH Coupler is a straight pipe fitting used to connect two pipes of equal size, allowing smooth and continuous fluid flow in piping systems. Some even diminish in size, allowing you to connect a PPH Coupler small pipe to a large pipe or vice versa. PPH Coupler is the high-quality product with either slip or female-threaded ends, depending on your needs.
- Chemical Resistance
- Low Maintenance Requirement
- Low Thermal Conductivity
- Long Service Life
- Easy Installation
- Corrosion Resistance
PPH Coupler Details
ID – Inside Diameter
OD – Outside Diameter
WT – Wall Thickness
SL – Socket Length
L – Overall Length
| Size (Inch) | ID (mm) | OD (mm) | WT (mm) | SL (mm) | L (mm) |
| ½” | 21.64 | 29.10 | 3.73 | 22.23 | 47 |
| ¾” | 26.97 | 34.79 | 3.91 | 25.40 | 54 |
| 1″ | 33.78 | 42.88 | 4.55 | 28.58 | 60 |
| 1¼” | 42.55 | 52.25 | 4.85 | 31.75 | 67 |
| 1½” | 48.72 | 58.88 | 5.08 | 34.93 | 73 |
| 2″ | 60.78 | 71.86 | 5.54 | 38.10 | 80 |
| 2½” | 73.56 | 87.58 | 7.01 | 44.45 | 96 |
| 3″ | 89.50 | 113.74 | 7.62 | 47.63 | 102 |
| 4″ | 114.99 | 132.11 | 8.56 | 57.15 | 121 |
| 6″ | 153.88 | 168.10 | 7.11 | 77.25 | 160 |
| Parameter | Specification Details |
| Product Type | Coupler / Socket (Straight Connector) |
| Material | PPH (Polypropylene Homopolymer) |
| Function | Joining two pipes of equal diameter |
| Connection Type | Socket Fusion / Butt Fusion / Threaded |
| Pressure Rating | PN6 / PN10 (Commonly PN10) |
| Max Working Pressure | Up to 10 bar (at 20°C) |
| Temperature Range | 0°C to +100°C |
| Size Range | 20 mm to 160 mm (Custom sizes available) |
| Standards | DIN 8077/8078, ISO 15494, EN ISO |
| Manufacturing Method | Injection molded |
| Applications | Chemical processing, water treatment, industrial piping |
| Structure | Straight cylindrical body |
| Weight | Lightweight (High strength-to-weight ratio) |
| Surface Finish | Smooth internal & external (Low friction loss) |
| Corrosion Resistance | Excellent (Acids, alkalis, salts) |
| Chemical Resistance | Highly suitable for aggressive fluids |
| Thermal Stability | Efficient performance up to ~100°C |
| Mechanical Strength | High impact resistance |
| Joint Integrity | Leak-proof when properly welded/fused |
| Durability | Long service life; non-rusting and scale-resistant |
1. High Corrosion Resistance
- Resistant to acids, alkalis, and aggressive chemicals
- Ideal for chemical and wastewater systems
2. Lightweight Construction
- Much lighter than metal fittings
- Easy to handle, transport, and install
3. Leak-Proof Joint
- Ensures tight sealing when properly fused or threaded
- Prevents fluid leakage and contamination
4. Excellent Chemical Compatibility
- Suitable for a wide range of industrial fluids
- Non-reactive with most chemicals
5. Smooth Internal Surface
- Reduces friction and pressure loss
- Prevents scaling and deposits
6. Easy Installation
- Supports socket fusion, butt fusion, and threaded connections
- Requires minimal tools and time
7. Good Mechanical Strength
- Withstands moderate pressure (PN10/PN16)
- Durable under normal operating conditions
8. Thermal Resistance
- Operates efficiently up to ~95–100°C
- Maintains stability under temperature variations
9. Long Service Life
- Non-corrosive and wear-resistant
- Provides extended durability
10. Low Maintenance
- Requires minimal upkeep due to non-rusting and non-scaling properties
11. Cost-Effective
- Economical compared to metal fittings
- Reduces overall system and maintenance costs
12. Versatile Applications
- Suitable for chemical processing, water treatment, and industrial piping systems
| Parameter | Specification Details |
| Nominal Pressure Rating | PN10 / PN16 |
| Maximum Working Pressure | Up to 10–16 bar (at 20°C) |
| Common Rating | PN10 (most widely used) |
| Higher Rating | PN16 (smaller sizes / thicker wall) |
| Hydrostatic Test Pressure | ~1.5 × working pressure |
| Applicable Standards | DIN, ISO |
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 Coupler
1. Excellent Corrosion Resistance
- Resistant to acids, alkalis, and chemicals
- Ideal for chemical and wastewater applications
2. Lightweight and Easy to Handle
- Much lighter than metal fittings
- Reduces installation time and labor effort
3. Leak-Proof Connection
- Provides tight and secure joints when properly welded
- Ensures safe and efficient fluid transfer
4. High Chemical Compatibility
- Suitable for handling aggressive and corrosive fluids
- Non-reactive with most industrial chemicals
5. Easy Installation
- Compatible with socket fusion, butt fusion, or threaded connections
- Requires minimal tools and effort
6. Low Maintenance
- Non-corrosive and non-scaling
- Reduces maintenance and replacement costs
7. Good Mechanical Strength
- Strong enough for medium pressure systems (PN10/PN16)
- Can withstand normal industrial stresses
8. Thermal Resistance
- Operates effectively up to ~95–100°C
- Maintains performance under temperature variations
9. Cost-Effective Solution
- More economical compared to metal couplers
- Offers long service life with low lifecycle cost
10. Smooth Flow Characteristics
- Smooth inner surface reduces friction and pressure loss
- Prevents scaling and deposits
Types of PPH Coupler
Socket Fusion Coupler
- Connected using socket welding (heat fusion)
- Most common type for small diameter pipes
- Provides strong and leak-proof joints
Butt Fusion Coupler
- Joined by butt welding process
- Suitable for medium to large diameter pipelines
- Ensures uniform joint strength
Threaded Coupler
- Provided with internal threads on both ends
- Used in low-pressure systems
- Easy installation without welding
Standard (Straight) Coupler
- Connects two pipes of same diameter in a straight line
- Most widely used type
Slip Coupler (Repair Coupler)
- One end can slide over the pipe
- Used for repairing damaged pipelines
- No need for extra pipe section
Reducing Coupler
- Connects pipes of different diameters
- Acts as both coupler and reducer
- Used where pipe size needs to be reduced
Injection Molded Coupler
- Manufactured by molding process
- Used for standard sizes
- Smooth finish and consistent quality
Fabricated Coupler
- Made by cutting and welding PPH material
- Suitable for large or custom sizes
Vitroling / Lined Coupler
- Inner lining (PTFE/FEP) for extra chemical resistance
- Used in highly corrosive applications
Heavy Duty / Reinforced Coupler
- Thicker wall design
- Suitable for higher pressure applications (PN16)
Applications of PPH Coupler
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 PPH Backing Ring are efficient, reliable, and essential tools in industrial automation, offering precise control of flow, pressure, and temperature. Proper selection, correct installation, and regular maintenance to ensure that these rings perform optimally in practical applications. As industrial automation technology continues to advance, the PPH Backing Ring will see broader applications and improved performance, providing a reliable foundation for safe, efficient, and stable production.
