6720 HDPE Flexible Tubing
6720 HDPE Flexible Tubing refers to a type of high-density polyethylene (HDPE) tubing that is manufactured in accordance with ASTM D6720 standards, which specify requirements for pressure-rated plastic piping systems used in industrial and utility applications. 6720 HDPE Flexible Tubing is a durable, pressure-rated polyethylene tubing designed as per ASTM D6720 standards, offering flexibility, chemical resistance, and reliable performance for fluid transport.
6720 HDPE Flexible Tubing combines strength, flexibility, and durability, making it an efficient solution for modern piping systems where ease of installation and long-term reliability are required. Made from high-density polyethylene (HDPE) material, designed for flexibility and easy installation, suitable for pressure applications and resistant to corrosion, chemicals, and environmental stress, providing a long service life with minimal maintenance
6720 – HDPE Flexible Tubing Details
| Parameter | Typical Value / Description |
| Base Material | High-Density Polyethylene (HDPE) |
| Material Grade | PE63 / PE80 / PE100 |
| Density | 0.94 – 0.96 g/cm³ |
| Color | Black (often with blue stripes for water) |
| UV Resistance | Yes (carbon black stabilized) |
| Surface Finish | Smooth inner & outer surface |
| Flexibility | High (can be coiled easily) |
| Weight | Lightweight |
| Roughness Coefficient | Very low (efficient flow) |
| Abrasion Resistance | Excellent |
| Tensile Strength | 20 – 30 MPa |
| Elongation at Break | > 350% |
| Impact Resistance | Excellent |
| Ring Stiffness | Moderate |
| Creep Resistance | Very good |
| Working Temperature | -40°C to +60°C |
| Melting Point | ~130°C |
| Thermal Conductivity | Low |
| Thermal Expansion | High (typical of HDPE) |
| Flow Characteristics | Smooth, low friction loss |
| Scaling | No scaling or deposits |
| Flow Efficiency | High |
| Pressure Rating (PN) | PN6 – PN16 (depending on SDR) |
| SDR Range | SDR 9 to SDR 17 |
| Test Pressure | Higher than rated PN |
| SDR | PN Rating (Bar) | Pressure (MPa) |
| SDR 41 | PN 4 | 0.4 MPa |
| SDR 33 | PN 5 | 0.5 MPa |
| SDR 26 | PN 6.3 / PN 5 | 0.63 MPa / N/A |
| SDR 21 | PN 8 / PN 6 | 0.8 MPa / N/A |
| SDR 17 | PN 10 / PN 8 | 1.0 MPa / N/A |
| SDR 13.6 | PN 12.5 / PN 10 | 1.25 MPa / N/A |
| SDR 11 | PN 16 / PN 12.5 | 1.6 MPa / N/A |
| SDR 9 | PN 20 / PN 16 | 2.0 MPa / N/A |
| SDR (Standard Dimension Ratio) | Pressure Rating (PN) | Pressure (Bar) | Typical Use |
| SDR 17 | PN6 | 6 Bar | Low-pressure water / irrigation |
| SDR 13.6 | PN8 | 8 Bar | Light-duty water supply |
| SDR 11 | PN10 | 10 Bar | General water distribution |
| SDR 9 | PN12.5 – PN16 | 12.5 – 16 Bar | Medium-pressure systems |
- Base Raw Material
a. High-Density Polyethylene (HDPE) Resin
- Main material used in sheet production
- Derived from petroleum-based hydrocarbons (ethylene monomer)
- Provides:
- High strength-to-weight ratio
- Chemical resistance
- Impact resistance
- Low moisture absorption
2. Additives Used in HDPE Sheet
Additives are mixed with HDPE resin to improve specific properties:
a. UV Stabilizers
- Protect sheets from sunlight degradation
- Essential for outdoor applications
b. Antioxidants
- Prevent material degradation during processing
- Improve long-term thermal stability
c. Color Masterbatch
- Adds color (black, blue, green, etc.)
- Ensures uniform appearance
d. Carbon Black
- Used mainly in black HDPE sheets
- Enhances UV resistance and durability
e. Processing Aids
- Improve flow during extrusion
- Help achieve smooth surface finish
f. Flame Retardants (Optional)
- Reduce flammability
- Used in electrical or safety applications
g. Anti-static Agents (Optional)
- Reduce static electricity buildup
- Used in electronics environments
3. Recycled Material
- Reprocessed HDPE can be used
- Reduces cost and environmental impact
- Usually used in non-critical applications
4. Manufacturing Process Materials
During production (mainly extrusion), the following are involved:
- HDPE granules/pellets
- Additive masterbatches
- Heat and pressure (no chemical reaction, only melting and shaping)
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 6720 HDPE Flexible Tubing
1. Excellent Flexibility
- Easily bends and coils without cracking
- Ideal for uneven terrain and long continuous runs
- Reduces the number of joints and fittings
2. Lightweight & Easy Handling
- Much lighter than metal pipes
- Simplifies transportation, storage, and installation
- Lowers labor and installation costs
3. Corrosion & Rust Resistance
- Completely resistant to rust and corrosion
- Suitable for underground and aggressive environments
4. Strong Chemical Resistance
- Withstands acids, alkalis, and salts
- Suitable for industrial and chemical fluid transport
5. Smooth Inner Surface
- Low friction coefficient improves flow efficiency
- Prevents scaling, deposits, and clogging
6. Leak-Resistant System
- Available in long continuous lengths
- Fewer joints reduce chances of leakage
- Compatible with reliable fusion and compression joints
7. Long Service Life
- Designed lifespan of 50+ years
- Resistant to environmental stress cracking and aging
8. High Impact Resistance
- Can handle rough handling and installation stress
- Performs well in tough site conditions
9. UV & Weather Resistance
- Material allows outdoor use
- Resistant to sunlight and weather degradation
10. Low Maintenance
- No corrosion or scaling issues
- Minimal repair and maintenance requirements
11. Cost-Effective Solution
- Lower installation, repair, and replacement costs
- Long life reduces overall lifecycle cost
12. Safe for Drinking Water
- Non-toxic and hygienic material
- Does not affect water taste, odor, or quality
Types of 6720 HDPE Flexible Tubing
1. Based on Pressure Rating (PN Class)
a) Low-Pressure Tubing (PN6 – PN8)
- Used for irrigation and low-pressure water flow
- Suitable for gardens and drainage
b) Medium-Pressure Tubing (PN10 – PN16)
- Used in water supply and industrial applications
- Offers a balance of strength and flexibility
2. Based on SDR (Wall Thickness)
a) High SDR Tubing (SDR 13.6 – SDR 17)
- Thinner wall
- More flexible but lower pressure capacity
b) Low SDR Tubing (SDR 9 – SDR 11)
- Thicker wall
- Higher pressure resistance
3. Based on Material Grade
a) PE63 Tubing
- Older grade
- Used in low-pressure applications
b) PE80 Tubing
- Moderate strength and durability
- Suitable for general-purpose use
c) PE100 Tubing
- High strength and performance
- Used in high-pressure and critical systems
4. Based on Structure
a) Plain HDPE Flexible Tubing
- Single-layer construction
- Standard use in water and irrigation systems
b) Reinforced HDPE Tubing
- May include additional layers or reinforcement
- Improved strength and durability
5. Based on Application
a) Water Supply Tubing
- Designed for potable water
- Food-grade inner surface
b) Irrigation Tubing
- Used in drip and sprinkler systems
- Flexible and easy to install
c) Industrial Tubing
- Used for chemical and fluid transfer
- High resistance to chemicals
d) Cable Protection Tubing
- Used as conduit for electrical or telecom cables
6. Based on Connection Type
a) Compression Type Tubing
- Connected using compression fittings
- Easy installation for small systems
b) Fusion Welded Tubing
- Joined using butt fusion or electrofusion
- Strong and leak-proof joints
c) Push-Fit Tubing
- Quick installation without special tools
- Used in small diameter applications
Applications of 6720 – HDPE Flexible Tubing
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?
6720 HDPE Flexible Tubing is a reliable and durable solution for a wide range of industrial and fluid transfer applications. Manufactured from high-quality High-Density Polyethylene, it offers excellent flexibility, chemical resistance, and long-term performance even in demanding environments.
Its lightweight structure, corrosion resistance, and ease of installation make it a cost-effective alternative to traditional piping materials. The tubing is capable of handling varying pressure conditions while maintaining strength and leak-free operation. Additionally, its resistance to UV rays, abrasion, and environmental stress ensures extended service life with minimal maintenance. Due to these advantages, 6720 HDPE Flexible Tubing is widely preferred for water distribution, chemical handling, irrigation systems, and industrial fluid transport applications.
