63mm HDPE coupler is a connection device designed for high-density polyethylene pipes with an outer diameter of 63 mm. It is made of high-quality high-density polyethylene (HDPE) material and has excellent physical and chemical properties. This specification coupler complies with international and domestic standards such as ISO 4427 and GB/T 13663, and is widely used in municipal water supply and drainage, agricultural irrigation, industrial pipelines and other fields.
Main technical parameters
Nominal diameter: DN63 (outer diameter 63mm)
Pressure level: PN0.6MPa/PN0.8MPa/PN1.0MPa/PN1.25MPa/PN1.6MPa
Connection method: hot melt butt welding/electrical melting/mechanical connection
Working temperature: -40℃ to +60℃ (short term up to +80℃)
Color: standard black (containing 2.5% carbon black for UV resistance)
Service life: underground laying for more than 50 years
Material properties
Density: 0.941-0.965g/cm³
Melt index: 0.1-0.5g/10min (190℃/5kg)
Tensile strength: ≥20MPa
Elongation at break: ≥350%
Elastic modulus: 800-1000MPa
Product structure and type segmentation
1. Hot-melt butt-joint coupler
Using the same material as the pipe, it is connected by heating to a molten state with a special hot-melt welding machine. Features include:
High connection strength, which can reach more than 90% of the strength of the pipe body
Excellent sealing performance
Requires professional equipment and technicians to operate
Suitable for large-diameter, high-pressure pipeline systems
2. Electric fusion connection coupler
Built-in resistance wire, powered heating to fuse the coupler with the pipe. Features include:
Easy and quick installation
Suitable for operation in narrow spaces
Stable and reliable connection quality
Requires special electric fusion welding machine to control parameters
3. Mechanical connection coupler
Connection is achieved through mechanical parts such as stainless steel sleeves and rubber sealing rings. Features include:
Removable and reusable
No professional equipment required
Suitable for temporary pipelines or occasions that require frequent disassembly and assembly
Relatively low pressure bearing capacity
Performance advantage analysis
1. Excellent chemical corrosion resistance
Resistant to various acid, alkali and salt solutions (pH2-12)
Resistant to various organic solvents
Not affected by electrochemical corrosion
Especially suitable for chemical, electroplating and other industries
2. Excellent physical and mechanical properties
High impact resistance (≥10kJ/m²)
Good flexibility and anti-sedimentation ability
Excellent anti-fatigue performance
Low friction coefficient (0.07-0.11)
3. Outstanding fluid characteristics
Smooth inner wall (roughness coefficient 0.009)
Low hydraulic loss
No scaling, no bacteria
Keep water clean
4. Environmental protection and economic benefits
100% recyclable
Light weight (only 1/8 of metal pipes)
Low construction cost
Low maintenance cost
Installation operation specifications
Hot-melt butt installation steps
Preparation: Check pipes and fittings, clean connection surfaces, and make markings
Clamping and fixing: Fix the pipes and couplers on the welding machine fixture
Milling end face: Use a milling cutter to mill the end face to ensure that the contact surface is flat
Heating with heating plate: Set the heating plate temperature to 210±10℃ and apply appropriate pressure
Switch butt: Quickly remove the heating plate and apply butt pressure (0.15MPa)
Cooling and shaping: Keep the pressure cooling for at least 10 minutes
Main points for electric fusion connection installation
Strictly set the time and voltage according to the parameters of the electric fusion welding machine
Ensure that the insertion depth of the pipe meets the marking requirements
The pipe must not be moved during the connection process
Avoid external force during cooling
Precautions for mechanical connection
Check that the sealing ring is intact
Tighten the bolts evenly to the specified torque
Avoid deformation caused by over-tightening
Check the tightening status regularly
Detailed explanation of application fields
1. Municipal engineering applications
Urban water supply network system
Sewage collection and discharge pipelines
Recycled water reuse network
Rainwater drainage system
2. Agricultural irrigation system
Field drip irrigation main pipeline
Sprinkler system connection
Greenhouse irrigation
Orchard and tea garden water conservancy project
3. Industrial applications
Chemical fluid transportation
Slurry pipeline system
Food processing production line
Power cable protection
4. Special environment applications
Submarine pipeline repair
Desert water supply
Alpine pipeline
Corrosive soil environment
Selection and Purchasing Guide
1. Key Selection Parameters
Pressure Level: Select PN level according to system working pressure
Connection method: Consider construction conditions and post-maintenance requirements
Certification Standard: Check whether it complies with GB/T, ISO and other standards
Manufacturer: Prefer well-known brands and regular suppliers
2. Quality Identification Method
Observe appearance: smooth and flat surface, no bubbles or cracks
Check identification: clear specifications and models, production batch number
Measure dimensions: outer diameter and wall thickness meet tolerance requirements
Material testing: melt index and density test when necessary
3. Purchasing Precautions
Confirm delivery cycle and inventory status
Understand after-sales service policy
Request quality certification documents
Consider transportation and storage conditions
Maintenance and troubleshooting
1. Daily maintenance points
Regularly check whether there is leakage at the connection
Observe changes in pipeline system pressure
Record operating temperature fluctuations
Keep the pipeline clean
2. Common Problem Solutions
Problem 1: Leakage at the joint
Cause: Improper installation or aging of the seal ring
Solution: Re-tighten or replace the seal
Problem 2: Insufficient connection strength
Cause: Wrong hot melt parameter setting
Solution: Cut off and re-weld
Problem 3: Pipe deformation
Cause: External impact or high temperature
Solution: Replace damaged parts
FAQ
Q1: How much pressure can a 63mm HDPE coupler withstand?
A1: The standard product pressure rating is PN0.6-PN1.6MPa, and special designs can reach PN2.0MPa. The specific pressure bearing capacity needs to be checked on the product logo.
Q2: How long after installation can the pressure be tested?
A2: Hot-melt connections need to be cooled for 24 hours before pressure testing, electric-melt connections need to be cooled for 2 hours, and mechanical connections can be pressure tested immediately but the pressure needs to be gradually increased.
Q3: Can 63mm HDPE couplers of different brands be mixed?
A3: It is not recommended to mix them. The dimensional tolerances and material properties of products from different manufacturers may be different, which will affect the connection quality.
Q4: Does underground laying require special protection?
A4: It can be laid directly in general soil environments, and it is recommended to add protective casing in rocky areas or corrosive soils.
As an important part of modern pipeline engineering, the 63mm HDPE coupler has won wide application with its excellent performance and reliable quality. Correct selection, standardized installation and scientific maintenance are the key to ensuring the long-term and stable operation of the pipeline system.
