PPH Union
A PPH Union is a detachable pipe fitting made from Polypropylene Homopolymer (PPH) that is used to connect two pipes in a piping system while allowing easy disconnection and maintenance without cutting the pipeline. PPH unions like couplings join objects together, but they are a less permanent option that can be easily destroyed. PPH unions are often used to construct temporary constructions, such as tent supports, and are dismantled when the structure is no longer needed. They have a ring in the middle that divides the two ends, making dismantling and maintenance simple.A PPH Union provides a secure yet easily removable connection, making it ideal for systems where maintenance, inspection, or replacement is required without dismantling the entire pipeline.
PPH union pipe and fittings are made from a Polypropylene Homopolymer material that has been properly developed. These pipes are abrasion resistant, have high mechanical strength, are tough, durable, and can survive harsh weather conditions.PPH union and PPH pipe union connectors are pipe fittings that allow two pipes to be connected without using sealants or conventional bonded couplings.It is a removable pipe joint that allows pipes to be connected and disconnected quickly for maintenance or replacement.
- Chemical Resistance
- Low Maintenance Requirement
- Low Thermal Conductivity
- Long Service Life
- Easy Installation
- Corrosion Resistance
PPH Union Details
ID – Inner Diameter
OD – Outer Diameter
WT – Wall Thickness
SL – Socket Length
L – Overall Length
H – Hex Height (typically including nut for tightening)
| Size (Inch) | ID (mm) | OD (mm) | WT (mm) | SL (mm) | L (mm) | H (mm) |
| ½ | 21.64 | 29.10 | 3.73 | 22.23 | 46 | 62 |
| ¾ | 26.97 | 34.79 | 3.91 | 25.40 | 53 | 65 |
| 1 | 33.78 | 42.88 | 4.55 | 28.58 | 69 | 68 |
| 1¼ | 42.55 | 52.25 | 4.85 | 31.75 | 71 | 85 |
| 1½ | 48.72 | 58.88 | 5.08 | 34.93 | 95 | 85 |
| 2 | 60.78 | 71.86 | 5.54 | 38.10 | 115 | 94 |
| 2½ | 73.38 | 88.54 | 7.58 | 45.45 | 125.8 | 101.4 |
| 3 | 89.31 | 97.41 | 8.10 | 48.63 | 146.7 | 107 |
| 4 | 114.76 | 124.19 | 9.43 | 58.15 | 176.2 | 126.35 |
| Parameter / Property | Details & Typical Values |
| Material | Polypropylene Homopolymer (PPH) |
| Type | Detachable pipe fitting (Union) |
| Function | Connects two pipes with easy disconnection for maintenance |
| Design | Three-piece construction (two ends + union nut) |
| Connection Type | Socket fusion / Threaded / Combination |
| End Type | Plain (socket), Male/Female threaded |
| Sealing Method | O-ring / gasket sealing |
| Pressure Rating | PN10 (10 bar) for socket type; ~6 bar for threaded type |
| Temperature Range | -20°C to 100–120°C |
| Size Range | 20 mm to 63 mm (metric); ½” to 2” (threaded) |
| Standards | DIN 16962, ISO 15494 |
| Jointing Method | Fusion welding + mechanical union connection |
| Color | Grey / Natural |
| Applications | Chemical plants, water systems, industrial pipelines |
| Density | ~0.90–0.91 g/cm³ |
| Tensile Strength | ~30–35 MPa |
| Flexural Strength | ~45 MPa |
| Melting Temperature | ~160–165°C |
| Max Service Temperature | Up to ~100°C |
| Water Absorption | Very low (<0.1%) |
| Thermal Conductivity | ~0.22 W/m·K |
| Chemical Resistance | Excellent (acids, alkalis, salts) |
| Electrical Properties | High dielectric strength (insulator) |
| Structure | Semi-crystalline thermoplastic |
1. Three-Piece Detachable Design
- Consists of two end connectors and a central union nut
- Allows easy assembly and disassembly
2. Leak-Proof Sealing System
- Uses O-ring or gasket
- Ensures tight and reliable sealing
3. High Chemical Resistance
- Resistant to acids, alkalis, and corrosive chemicals
- Suitable for aggressive industrial fluids
4. Corrosion & Rust Free
- Non-metallic PPH material prevents rust and scaling
- Ideal for long-term use in harsh environments
5. Lightweight Construction
- Easy to handle and install
- Reduces labor and installation time
6. Excellent Mechanical Strength
- Strong and rigid design
- Suitable for moderate pressure applications
7. High Temperature Resistance
- Can operate up to ~90–100°C
- Maintains performance under elevated temperatures
8. Smooth Internal Surface
- Minimizes friction and pressure loss
- Ensures efficient fluid flow
9. Quick Maintenance Capability
- Enables fast removal and replacement without cutting pipes
10. Versatile Connection Options
- Available in socket, threaded, and combination types
11. Low Thermal Conductivity
- Reduces heat transfer in piping systems
12. Durable & Long Service Life
- Resistant to wear, chemicals, and environmental stress
| Category / Parameter | Details & Values |
| Socket Fusion (Plain Union) | PN 10 (10 bar) |
| Threaded Union | PN 6 (6 bar) |
| Combination (Socket × Threaded) | PN 6 (6 bar) |
| Heavy Duty / Industrial Union | PN 10 – PN 16 (10–16 bar) |
| Size Range: 20 mm – 63 mm | Up to 10 bar |
| Size Range: 75 mm – 110 mm | 6 – 10 bar |
| Size Range: Above 110 mm | 4 – 6 bar |
| Pressure Capacity @ 20°C | 100% (10 bar) |
| Pressure Capacity @ 40°C | ~80% (8 bar) |
| Pressure Capacity @ 60°C | ~60% – 70% (6–7 bar) |
| Pressure Capacity @ 80°C | ~40% – 50% (4–5 bar) |
| Pressure Capacity @ 100°C | ~20% – 30% (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.
Benefits of Using PPH Union
1. Easy Installation & Dismantling
- Can be quickly connected and disconnected without cutting pipes
- Ideal for systems requiring frequent maintenance
2. Leak-Proof Sealing
- Equipped with O-ring or gasket
- Ensures tight and secure joints
3. Excellent Chemical Resistance
- Resistant to acids, alkalis, and corrosive fluids
- Suitable for harsh industrial environments
4. Corrosion & Rust Free
- Non-metallic material prevents rusting and scaling
- Increases lifespan in aggressive conditions
5. Lightweight & Easy Handling
- Much lighter than metal unions
- Simplifies transportation and installation
6. High Temperature Resistance
- Can operate up to ~90–100°C
- Suitable for hot fluid applications
7. Strong & Durable
- Good mechanical strength and rigidity
- Provides reliable performance under pressure
8. Low Maintenance
- Resistant to chemical attack and fouling
- Reduces maintenance cost and downtime
9. Smooth Internal Surface
- Minimizes pressure loss and flow resistance
- Improves system efficiency
10. Versatile Connection Options
- Available in socket, threaded, and combination types
- Compatible with various piping systems
11. Long Service Life
- Durable material ensures extended operational life
12. Cost-Effective
- Lower installation and maintenance cost compared to metal fittings
Types of PPH Union
1. Socket Fusion Union
- Connected by socket welding (fusion method)
- Provides strong, permanent, and leak-proof joints
- Commonly used in industrial and chemical pipelines
2. Butt Fusion Union
- Joined using butt welding technique
- Suitable for larger diameter pipes
- Offers high strength and durability
3. Threaded Union
- Features male or female threaded ends (BSP/NPT)
- Easy to install and dismantle
- Ideal for low-pressure or maintenance-friendly systems
4. Combination Union (Socket × Threaded)
- One side socket fusion, other side threaded
- Useful for connecting different types of piping systems
5. Flanged Union
- Comes with flanged ends for bolted connections
- Suitable for large pipelines and heavy-duty applications
- Allows easy removal and maintenance
6. True Union
- Advanced design with removable ends and central nut
- Allows easy replacement without disturbing pipeline
- Common in valves and modular systems
7. Reducing Union
- Connects pipes of different diameters
- Used where size transition is required
8. O-Ring / Seal Type Union
- Based on sealing system:
- Flat seat union (gasket type)
- Taper seat union
- Ensures leak-proof sealing performance
Applications of PPH Union
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?
When it comes to industrial-grade piping systems, choice of the right manufacturer is as important as the material itself. Petron Thermoplast has earned a reputation as a trusted global leader in the field of PPH Union and industrial flow solutions. Our products are known for precision, performance, and durability, designed to meet the most demanding industry standards across chemical, water treatment, and infrastructure sectors.
With so many options on the market, why should you trust Petron Thermoplast for your PPH Union needs? The answer lies in our commitment to quality, service, and understanding your unique challenges.
We don’t just sell products—we engineer solutions. Our PPH Union are manufactured using the highest quality raw materials and technology, ensuring consistent performance and compliance with global standards. Every batch undergoes rigorous testing for pressure resistance, temperature tolerance, and durability, so you can be confident that what you’re installing is built to last.
