The best material for compressed air piping depends on pressure, environment, installation requirements and long-term performance.

Modern aluminium piping systems are widely used in industrial compressed air applications due to their corrosion resistance, lightweight installation and reduced pressure drop.

This guide compares the most common compressed air piping materials and explains how to select the right system for your application.

For a full system overview, see: What Is Unipipe Aluminium Industrial Piping?

Why Material Selection Matters in Compressed Air Systems

Compressed air systems rely on consistent pressure and clean airflow. The wrong pipe material can lead to corrosion, leaks, pressure loss and increased energy costs.

Material selection directly impacts:

• System efficiency
• Installation time and cost
• Maintenance requirements
• Safety and reliability

Common Compressed Air Piping Materials

Polyethylene (PE)

Polyethylene is a flexible thermoplastic material available in a wide range of pipe sizes.

Pros:

• Low cost
• Corrosion resistant
• Smooth internal surface

Cons:

• Thermal expansion and contraction
• Reduced internal bore due to wall thickness
• Typically limited to lower pressure systems

Nylon Tubing

Nylon tubing is commonly used in smaller compressed air systems and control applications.

Pros:

• Fast installation with push-fit connections
• Flexible and easy to modify
• Good abrasion resistance

Cons:

• Limited pipe sizes
• Not suitable for large-scale distribution systems

Aluminium Piping

Aluminium is widely used in modern compressed air systems due to its balance of performance, installation efficiency and long-term reliability.

Pros:

• Lightweight and easy to install
• Smooth internal bore reduces pressure drop
• Corrosion-resistant internal coatings
• Modular system allows expansion
• Consistent mechanical sealing

Considerations:

• Surface coatings must remain intact to prevent electrolysis
• System must be installed according to manufacturer specifications

Learn more: UnipipeAIR Technical Guide.

Black Steel

Black steel pipe is strong and commonly used in traditional compressed air systems.

Pros:

• High strength
• Suitable for high-pressure systems

Cons:

• Susceptible to internal corrosion
• Heavier and slower to install
• Requires welding or threading

Galvanised Steel

Galvanised steel includes a protective zinc coating.

Pros:

• Durable and strong
• Corrosion-resistant outer layer

Cons:

• Zinc coating can degrade over time
• Risk of internal flaking and contamination
• Heavy installation requirements

Stainless Steel

Stainless steel provides high corrosion resistance and durability.

Pros:

• Corrosion-resistant
• Suitable for harsh environments
• High-pressure capability

Cons:

• Higher material cost

Copper

Copper is a lightweight and corrosion-resistant material used in some compressed air systems.

Pros:

• Easy to work with
• Corrosion-resistant

Cons:

• Can be easily damaged
• Higher cost compared to alternatives

Is PVC Safe for Compressed Air?

PVC is not recommended for compressed air systems. Exposure to oils and pressure cycling can weaken the material, leading to brittle failure and potential safety risks.

Why Aluminium Is Commonly Selected for Modern Systems

For many industrial compressed air applications, aluminium piping provides a practical balance between performance, cost and installation efficiency.

• Reduced pressure drop improves system efficiency
• Lightweight construction speeds up installation
• Corrosion resistance maintains air quality
• Modular systems allow future expansion

Explore system design: Aluminium Compressed Air System Design Guide.

How to Choose the Right Piping Material

Pressure Requirements

Select materials that meet or exceed system operating pressure with appropriate safety margin.

For high-pressure applications: UnipipeHP High-Pressure System Handbook.

Pipe Sizing

Correct pipe size is critical for maintaining airflow and minimising pressure drop.

Environmental Conditions

Consider exposure to moisture, chemicals or temperature extremes.

Installation Requirements

Evaluate labour, downtime and system accessibility.

Cost vs Lifecycle Performance

Lower upfront cost may result in higher maintenance and energy costs over time.

Common Design and Installation Mistakes

• Undersized piping
• Poor condensate drainage
• Incorrect pressure rating selection
• Dead-end layouts instead of ring mains
• Ignoring future expansion

Frequently Asked Questions

What is the best material for compressed air piping?

The best material depends on application requirements. Aluminium is commonly selected for industrial systems due to its efficiency, corrosion resistance and ease of installation.

Is aluminium better than steel for compressed air?

Aluminium is often preferred for distribution systems due to lower weight, reduced pressure drop and faster installation.

Why is PVC not recommended?

PVC can become brittle under pressure and may fail unexpectedly, creating a safety risk.

What is the most cost-effective piping system?

Cost-effectiveness depends on installation time, maintenance and energy efficiency, not just material cost.

Can aluminium systems handle high pressure?

Yes. High-pressure aluminium systems are available depending on configuration and design requirements.

Real-World Application Example

Environment: Automotive workshop

Problem: Corrosion and pressure loss in existing steel system

Solution: Replacement with modular aluminium piping system

Result: Improved airflow consistency and reduced maintenance

Why Choose Air Energy

• Technical Expertise Since 1993 – Over 2,000 industrial installations across mining, aquaculture, manufacturing, and remote sites

• Multi-Industry Experience – Experts in compressed air, fuel, water, and process piping systems

• Project Support – Our technical team ensures safe, efficient, and long-lasting installations

With Air Energy, you get a piping solution designed for performance, reliability, and long-term operational efficiency.