In the HVAC and plumbing industry, talking about copper pipes also means talking about standards. They are not just technical requirements, but essential tools for ensuring safety, reliability, and long-term performance. Standards define precise parameters—including dimensions, wall thickness, material quality, and operating conditions—helping to reduce design and installation errors.
The main standards you should know
EN 1057 applies to copper tubes used for transporting water and gas in residential, commercial, and industrial installations. It specifies dimensional requirements, mechanical properties, and supply conditions.
EN 12735-1 is specifically designed for air conditioning and refrigeration systems. It establishes stricter requirements regarding internal cleanliness, residual contaminants, and compatibility with refrigerants—key factors for the correct operation and long-term reliability of HVAC systems.
This standard is referenced by EN 378, the European standard governing the design and safety of refrigeration systems and heat pumps. EN 378 identifies EN 12735-1 as the reference standard for copper tubes used in refrigeration circuits, while other system components are covered by their respective technical standards.
For international applications, it is also important to consider ASTM B280, the reference standard in the United States for copper tubes used in refrigeration and air conditioning systems. Although it belongs to a different regulatory framework, it establishes requirements similar to EN 12735-1 regarding tube quality, dimensions, and internal cleanliness.
In addition to these standards, other references—such as national standards and local regulations—complete the regulatory framework by defining installation practices and application requirements.
Compliance also affects the Declaration of Conformity
When installing an HVAC system, the compliance of materials is not only a technical requirement but also a regulatory and documentation requirement. For air conditioning and refrigeration systems, EN 378 is one of the primary standards governing system design and installation, and it identifies EN 12735-1 as the reference standard for copper tubes used in refrigeration circuits.
Using products that comply with the applicable standards helps ensure system safety, reliability, and proper installation. In countries where required by law, it also facilitates the issue of the relevant Declaration of Conformity, such as the Italian Dichiarazione di Conformità (Di.Co.) under Ministerial Decree 37/2008.
Beyond standards: the importance of insulation and outer coatings
Standards define the characteristics of the copper tube itself, but they do not always address its external protection.
In real-world applications, factors such as UV exposure, weather conditions, moisture, condensation, and mechanical stress can significantly affect the durability of the installation. For this reason, in addition to selecting compliant copper tubes, it is essential to choose insulation and outer coatings suitable for the specific application, helping protect the system and preserve its performance over time.
Compliance is the starting point. Protection is what makes the difference. Discover Nuova Zecchini solutions designed to ensure performance, reliability, and long-lasting durability for your HVAC systems. info@nuovazecchini.it
