Ultimate Guide to Types of Copper Tubes

Copper tubing has become one of the most trusted materials across various industries; from HVAC systems and refrigeration to plumbing, gas distribution, and even modern architecture. According to industry statistics, over 80% of commercial buildings use copper pipes for at least one major system, thanks to their durability, corrosion resistance, and superior thermal conductivity. These versatile tubes are not all the same; there are different types of copper tubes, each engineered for specific uses, pressure levels, and environments.

In this guide, we’ll explore every major type of copper tube, their advantages, and the best applications for each. Continue reading this article on Asteria Copper Industries, where we specialize in manufacturing premium-grade copper tubes that meet the highest global standards.

What Is a Copper Tube?

A copper tube (or copper pipe) is a cylindrical conduit made from pure copper or copper alloys, used to transport fluids like water, gas, or refrigerant. Known for its exceptional thermal and electrical conductivity, copper tubing has become a preferred material in both residential and industrial applications. Unlike plastic or steel alternatives, copper pipes are naturally resistant to corrosion, biofilm buildup, and UV degradation, ensuring a much longer lifespan.

When compared to materials like PVC or PEX, copper offers superior heat tolerance and mechanical strength, making it ideal for high-temperature systems. It is also recyclable and environmentally sustainable, further boosting its popularity. Because there are different types of copper tubes, engineers and builders can select the perfect type based on pressure ratings, wall thickness, and intended application.

Standard Types of Copper Tubes

Copper tubing is categorized into several standard types, each designed to perform optimally under specific operating conditions. Before diving into detailed explanations, here’s a quick comparative table that summarizes the main types of copper pipe and their uses.

Here is a comparison between types of Copper tubes:

Each of these copper tubing types serves unique needs. Below, we’ll explore their features, benefits, and ideal use cases in more detail.

Type K Copper Tube

Type K copper tube is known for its thickest wall among all copper tubing categories, providing the highest pressure tolerance and longest service life. It is often used in underground installations, HVAC systems, and industrial applications where durability and corrosion resistance are critical.

Key Features:

• Wall Thickness: 0.049″ to 0.083″ depending on diameter
• Available in both hard (rigid) and soft (coil) forms
• Pressure Rating: Up to 400 psi
• Color Code: Green

Advantages:

• Exceptional strength for pressurized systems
• Long-term reliability in harsh environments
• Compatible with flaring and soldering methods

Disadvantages:

• Higher cost due to material density
• More difficult to bend and install

Type K is the go-to option when performance and safety are top priorities; making it a staple in heavy-duty types of copper pipe and uses across industries.

Type L Copper Tube

Type L is the most commonly used among the different types of copper tubes for residential and commercial projects. It offers a balance between thickness and flexibility, making it ideal for water supply lines, HVAC systems, and refrigeration applications.

Specifications:

• Suitable for both hard and soft temper
• Wall Thickness: 0.040″ to 0.070″
• Color Code: Blue

Advantages:

• Excellent corrosion resistance
• Easier to install compared to Type K
• Approved for both interior and exterior use

Disadvantages:

• Slightly lower pressure tolerance than Type K

Because of its versatility, Type L remains one of the most recommended copper tubing types for contractors and engineers alike.

Type M Copper Tube

Type M copper tube features a thinner wall and lower cost, making it a preferred choice for residential water distribution where pressure demands are moderate. Despite being more affordable, it maintains sufficient strength for most low- to medium-pressure systems.

Technical Data:

• Used mainly in above-ground installations
• Wall Thickness: 0.028″ to 0.058″
• Color Code: Red

Advantages:

• Lightweight and easy to handle
• More economical option for large-scale residential projects
• Compatible with common fittings and joining techniques

Disadvantages:

• Not suitable for high-pressure or underground use

If you’ve ever wondered how many types of copper pipe are there for home plumbing, Type M will likely be the one you encounter most often due to its cost efficiency.

Type DWV Copper Tube

Type DWV (Drain, Waste, and Vent) tubing is specifically designed for non-pressurized systems, such as drainage and vent piping. It has the thinnest wall among all types of copper tubing and uses, making it lightweight and easy to work with.

Specifications:

• Color Code: Yellow
• Wall Thickness: 0.024″ to 0.042″
• Intended for gravity flow systems only

Advantages:

• Easy cutting and soldering
• Ideal for waste management systems
• Cost-effective for large installations

Disadvantages:

• Not rated for pressurized systems
• Limited to indoor use

Type DWV demonstrates that not all types of copper pipe and color are suitable for the same tasks; understanding these differences ensures safer and more efficient system design.

Industrial and Custom Types of Copper Tubes by Asteria

While traditional types of copper tubes (like Type K, L, M, and DWV) are defined by wall thickness and application standards, at Asteria Copper Industries we also manufacture specialized tubes based on form, shape, and industrial use. These are engineered to meet the precise needs of HVAC, refrigeration, and instrumentation systems. Each tube offers specific advantages in terms of flexibility, installation, and performance; designed for both reliability and efficiency.

Below is a comparison of Asteria’s different types of copper tubes used across industries:

Each of these copper tubing types is engineered under strict quality control at Asteria, using premium copper cathodes and advanced extrusion technology to ensure dimensional precision and long-term performance.

Copper Pancake Tube

The copper pancake tube is one of the most versatile types of copper pipe and uses. It comes in a coiled, flexible form, making it perfect for compact installations such as split air conditioners, refrigerators, and ice machines. Because it can be easily bent without fittings, it minimizes the risk of leaks and reduces labor time during installation.

Copper Straight Tube

The copper straight tube is the classic rigid pipe supplied in straight lengths, primarily used for plumbing, HVAC systems, and gas delivery lines. Its structure provides mechanical strength and dimensional stability, which makes it ideal for installations requiring long, straight runs and uniform flow.

Copper Capillary Tube

The copper capillary tube is a highly specialized component used for controlling refrigerant flow in air conditioners and refrigeration systems. This fine tube acts as a metering device, regulating pressure between the condenser and evaporator.

Manufactured at Asteria with micron-level precision, our capillary tubes guarantee accurate refrigerant flow, enhancing system performance and energy efficiency. These are among the most advanced types of copper tubing and uses in modern HVAC applications.

Understanding Copper Tube Sizes and Physical Dimensions

When discussing different types of copper tubes, it’s important to understand that “size” can mean different things depending on context. The two most common size references are Nominal Size (NS) and Outside Diameter (OD).

• Nominal Size (NS): Refers to a standardized label rather than the actual measurement. It’s mainly used in plumbing specifications.
• Outside Diameter (OD): Represents the true external measurement of the tube and is critical for fitting compatibility.

The nominal size often differs from the real outside diameter, which can confuse technicians during selection or replacement. That’s why engineers always check the OD; especially when integrating with existing systems or international fittings.

Pro Tip: Always verify both the OD and color code before installation. This ensures the correct tube type and avoids costly mismatches in field projects.

Applications of Copper Tubes

Copper tubing is essential across a wide range of industries due to its excellent conductivity, corrosion resistance, and formability. Below are the types of copper pipe and uses that connect directly to Asteria’s specialized product line:

These examples show how Asteria’s different types of copper tubes adapt to the specific needs of multiple sectors; offering performance and longevity wherever reliability is. Our blog on copper tubes for refrigeration and copper tubes for air conditioning will help you learn more about their applications.

Why Choose Asteria’s Copper Tubes?

Choosing Asteria Copper Industries means choosing excellence in design, durability, and precision. Our types of copper tubes are manufactured with top-grade raw materials, tested for high pressure and thermal performance, and certified to meet international standards. Whether you need flexible pancake coils, precision capillary tubes, or durable straight pipes, Asteria has the right solution for every industrial and commercial need.

If you’re wondering why use Asteria’s copper tubes, the answer is simple: because every product is crafted for reliability, performance, and longevity. You can place your order directly on the Asteria website; just scroll to the end of the page and click the orange “Send a Request” button or call our sales team. Our specialists will contact you to customize your order based on your specific project requirements.