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Insulated Copper Tube
Author: Site Editor Publish Time: 2025-12-11 Origin: Site
Choosing the right insulated copper pipes for air-conditioning (AC) and HVAC systems is a critical decision that affects cooling performance, energy efficiency, and the long-term durability of the system. Whether you're an HVAC installer, project contractor, system designer, or distributor, understanding how to select the proper insulated copper pipe is essential for delivering a reliable installation and avoiding costly maintenance issues.
In this comprehensive guide, we will explain everything you need to know about insulated copper pipes—including pipe materials, insulation types, recommended sizes, performance standards, and practical selection tips. By the end of this guide, you’ll be able to confidently choose the best insulated copper pipes for your AC systems in 2025 and beyond.
An insulated copper pipe is a copper refrigeration tube covered with a layer of insulation—most commonly PE (Polyethylene) foam or rubber (NBR/PVC) foam. This insulation prevents energy loss, reduces condensation, and protects the copper line from environmental damage.
Insulated copper pipes are widely used in:
Split air conditioners
VRF/VRV central air-conditioning systems
Heat pump installations
Commercial & industrial HVAC projects
Refrigeration systems
Because copper provides excellent thermal conductivity, corrosion resistance, and flexibility, it remains the industry’s top choice for AC refrigerant lines.
Insulating refrigerant copper pipes is not optional—it is a critical requirement for efficient AC performance.
Refrigerant lines carry cold or hot gas between indoor and outdoor units. Without insulation, thermal loss significantly reduces system efficiency.
Condensation can damage walls, ceilings, or equipment. Proper insulation forms a moisture barrier.
Outdoor installation demands a durable, weather-resistant insulation layer.
High-density insulation absorbs vibration and reduces sound transmission.
Most countries require insulated copper pipes for safety and energy-saving compliance.
There are two main types used in HVAC systems:
This is the most popular choice for modern residential and commercial AC installations.
Advantages:
Lightweight and cost-effective
Good thermal resistance
Excellent UV and moisture resistance
Easy to install and transport
Highly suitable for outdoor and rooftop installations
PE insulation is the preferred option for split ACs and VRF/VRV systems worldwide.
Advantages:
Excellent flexibility
Strong thermal resistance
Suitable for low-temperature refrigeration
Insulation thickness matters as much as copper diameter.
6mm – mild climates, indoor installations
9mm – most standard AC installations
13mm – outdoor or high-temperature environments
19mm+ – extreme conditions or long piping distances
Ambient temperature
UV and weather exposure
Pipe length
System capacity
Local building codes
Insufficient insulation can lead to higher electricity bills, condensation, or poor cooling performance.
In HVAC systems, copper quality is defined by both material grade and manufacturing standard.
They work together to ensure performance, safety, and long-term reliability.
Common HVAC Copper Grade
C12200 (ASTM) / TP2 (JIS) — Deoxidized Copper
This is the industry-standard copper grade for air-conditioning and refrigeration piping, offering:
· ≥99.9% copper purity
· Excellent corrosion resistance
· High thermal conductivity
· Stable performance and long service life
Corresponding International Standards
To ensure consistent quality, this copper grade is produced and tested under recognized international standards, including:
· ASTM B280 — North America
· EN 12735-1 — Europe
· JIS H3300 — Japan
Copper pipes manufactured to these standards are suitable for modern refrigerants such as R22, R410A, and R32, ensuring system compatibility and installation safety.
Environmental & Durability Considerations
PE insulated copper pipes function as a continuous refrigerant connection between indoor and outdoor units.
Insulation selection should be based on the most demanding section of the entire pipe route, particularly areas exposed to outdoor conditions.
✔ For Routes with Outdoor Exposure
Pipe sections exposed to sunlight, rain, or temperature fluctuations require:
· UV-resistant PE insulation
· Insulation thickness typically ranging from 9–20mm, depending on pipe diameter and system design
· Independent insulation thickness for liquid and gas lines, as required by engineering specifications
These measures help ensure stable thermal performance and long-term durability of the complete system.
PE insulated copper pipes function as a continuous refrigerant connection between indoor and outdoor units.
Insulation selection should be based on the most demanding section of the entire pipe route, particularly areas exposed to outdoor conditions.
✔ For Routes with Outdoor Exposure
Pipe sections exposed to sunlight, rain, or temperature fluctuations require:
· UV-resistant PE insulation
· Insulation thickness typically ranging from 9–20mm, depending on pipe diameter and system design
· Independent insulation thickness for liquid and gas lines, as required by engineering specifications
These measures help ensure stable thermal performance and long-term durability of the complete system.
✔ For Predominantly Indoor Installations
When the majority of the pipe route is installed indoors and protected from environmental exposure:
· Standard insulation thickness is commonly sufficient, subject to system requirements
· Moisture resistance remains essential to prevent condensation and energy loss
✔ For Long Pipe Runs or Engineering Projects
For extended line sets or commercial / industrial applications:
· Higher insulation density and optimized thickness selection may be required
· Final specifications should follow project drawings and HVAC system calculations
Many factories now offer customization services to help distributors build their brand:
Custom insulation thickness
Printed logo or brand name
Custom colors (black, white, etc.)
Pipe length (3m, 10m, 20m, 25m, up to 30 meters)
Reinforced export packaging
Choosing a reliable manufacturer with OEM capability is essential for distributors aiming to expand market share.
ASTM B280 or EN12735-1 certification is a must.
High purity ensures long-term reliability.
Hot climates require thicker insulation.
Copper quality must match R410a, R32, R22, etc.
Avoid oversized or undersized tubing.
Look for consistent density and smooth surface.
Especially important for wholesalers and engineering contractors.
Low-cost pipes may lead to costly failures.
Why PE Insulated Copper Pipes Are the Popular Choice for AC Systems
PE insulated copper pipes have become the industry standard because they offer the best balance of:
· Performance
· Durability
· Weather resistance
· Ease of installation
· Cost
They are ideal for nearly all residential and commercial HVAC applications.
Conclusion: Choosing the Right Insulated Copper Pipe Supports Long-Term System Performance
Selecting an insulated copper pipe is a key part of any air-conditioning or HVAC installation.
Pipe diameter, insulation thickness, copper quality, and installation environment all work together to influence system efficiency and long-term stability.
A well-selected PE insulated copper pipe helps support:
· Consistent cooling performance
· Improved energy efficiency
· Reduced maintenance over time
· Longer service life of the system
· Compliance with international HVAC standards
At XLBAODI, we work with distributors, HVAC contractors, and project engineers to provide reliable PE insulated copper pipe solutions tailored to real installation conditions.
How We Can Support Your Project
· Custom pipe sizes and configurations
· OEM logo printing and labeling options
· Multiple insulation thickness choices
· Export-ready packaging for global markets
If you need product samples, technical data sheets, or would like to discuss specifications, our team is always happy to assist.
