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Zhejiang Jingliang Copper-Tube Products Co., Ltd

Wholesale EN 12735 Standard Tubes

EN 12735 Standard Tubes

-- Steady & Reliable Manufacturer --

Compliance with European Refrigeration Standards

EN 12735 is the definitive European standard for seamless copper tubes used in air conditioning and refrigeration. It is divided into two parts: Part 1 covers tubes for piping systems (similar to ASTM B280), and Part 2 covers tubes for equipment manufacturing (like heat exchangers). For manufacturers targeting the European Union and UK markets, compliance with EN 12735 is not just an option—it is often a legal and commercial necessity. This standard is highly specific about the surface quality and cleanliness of the tube, reflecting the sophisticated nature of European HVAC engineering. Our EN 12735 compliant tubes are manufactured using high-purity Cu-DHP (Phosphorus-deoxidized copper), ensuring they meet the chemical requirements necessary for CE marking and Pressure Equipment Directive (PED) compliance. We focus on delivering a product that meets the specific "Euro-size" requirements (metric) and the high safety factors demanded by European safety codes.

The EN 12735 standard places a high emphasis on the "integrity of the bore." This means that the inner surface must be free from any imperfections that could act as a stress concentrator or a site for corrosion. Our manufacturing line uses advanced eddy current testing to scan 100% of the production for sub-surface flaws. Additionally, the standard requires specific mechanical properties that ensure the tube can be safely joined using modern European press-fit systems or traditional brazing. As Europe leads the world in the adoption of natural refrigerants like R290 (Propane) and R744 (CO2), our EN 12735 tubes have been optimized to handle the unique pressure and temperature profiles of these gases. By choosing our EN 12735 compliant tubing, you are ensuring that your products are ready for the rigorous regulatory landscape of the European market, from the F-Gas regulations to local building safety codes.

Technical Parameters and EN Compliance

PropertyEN 12735-1 / 12735-2 Details
Material GradeCu-DHP (CW024A)
Copper ContentMin 99.90%
Phosphorus Content0.015% to 0.040%
Cleanliness (Part 1)Max residue 38 mg/m²
Standard SizesMetric (e.g., 6mm, 10mm, 12mm, 15mm, etc.)
Temper DesignationR220 (Soft), R250 (Half-hard), R290 (Hard)
Dimensional TolerancesCompliant with EN 12735-1 Table 3
MarkingManufacturer + EN 12735 + Size + Date Code

Applications Across the European Market

EN 12735 tubes are the standard choice for refrigeration and air conditioning installations across the EU, UK, and EFTA countries. This includes residential split systems, VRF (Variable Refrigerant Flow) systems in commercial office buildings, and industrial cooling for the food processing industry. In Northern and Central Europe, these tubes are extensively used in air-source and ground-source heat pumps, which are the primary focus of the region's green energy transition. The Part 2 variant of the standard is specifically applied to the production of high-performance heat exchangers used in commercial refrigeration cabinets found in European supermarkets. Because of the metric sizing, these tubes are also used in various European automotive cooling systems and as high-precision fluid lines in European-made laboratory equipment. Their strict cleanliness also makes them suitable for some specialized oil-free compressed air applications in European manufacturing plants.

Advantages of EN 12735 Certified Tubing

The primary advantage of using our EN 12735 compliant tubing is its alignment with the European Pressure Equipment Directive (PED). This simplifies the certification process for your final equipment, as the copper tubing is already documented to meet the required safety levels. Our tubes feature exceptional surface smoothness, which minimizes pressure drop and noise in high-velocity refrigerant systems—a key requirement for the quiet-operation standards common in European residential areas. The "clean and dry" state of our tubes is guaranteed by our bright annealing and nitrogen-capping process, which prevents the internal oxidation that can occur during long-term storage. Furthermore, our metric sizing is precise to the micron, ensuring perfect compatibility with European-made fittings and automated bending machines. By using our EN 12735 tubing, you avoid the risks of using non-standardized material, such as poor joint fitment or premature system failure, which can be extremely costly in the high-labor-cost European market.

Logistics, Payment, and EU Distribution

We have extensive experience shipping to major European ports such as Rotterdam, Hamburg, Antwerp, and Felixstowe. We offer payment via T/T or L/C at sight, and for regular European distributors, we can offer flexible credit terms. To meet the diverse needs of the European market, we supply EN 12735 tubes in both metric and fractional (inch) sizes, though metric is the standard. Packaging is designed to withstand long-distance sea freight; we use heavy-duty pallets with plastic protection to prevent "sweating" and oxidation caused by sea air. Each shipment comes with a full set of documents, including the Declaration of Conformity and Mill Test Certificates to EN 10204 3.1. We are familiar with the specific labeling requirements for the EU market, including GS1 barcodes and specific traceability codes, ensuring that our products can be easily integrated into your European supply chain.

  • Q: What is the difference between EN 12735 and the older EN 1057 standard?
  • A: EN 1057 is the general standard for water and gas plumbing. EN 12735 is a specialized standard for refrigeration and air conditioning, with much stricter requirements for internal cleanliness and pressure ratings.
  • Q: Do you support R290 (Propane) applications?
  • A: Yes, our EN 12735 tubes are tested to ensure the internal surface is free of carbon and other contaminants that could react with or be affected by hydrocarbon refrigerants like R290.
  • Q: Are your tubes CE marked?
  • A: Our tubes are manufactured to meet the requirements of the PED (Pressure Equipment Directive), which allows them to be used in CE-marked systems across Europe.
ABOUT US
30+YEARS OF
EXPERIENCE
About Us

A Reliable Partner of the Copper Tube Industry

Zhejiang Jingliang Copper-Tube Products Co., Ltd is China EN 12735 Standard Tubes and EN 12735 Standard Tubes Factory, which established in 1994, has been deeply involved in the copper tube industry for over three decades. The company primarily produce various specifications of products such as copper tubes, brass tubes, copper square tubes, fin copper tubes, copper capillary tubes, condenser copper tubes, copper evaporator tubes, and conductive rods, which are of quality and have earned the trust and acclaim of customers both domestically and internationally.

Wide Applications:

These products are widely used in various fields including air conditioning, refrigeration, heat exchange, sanitary ware, automotive, machinery, electric furnaces, and chemical industries.

Convenient Transportation:

Strategically located in Tangpu Town, renowned as the “home of copper tubes” in East China. Our company enjoys a prime location, adjacent to the Shangsan Expressway and National Highway 104, and is conveniently situated just over 70 kilometers from Hangzhou and Ningbo, ensuring easy accessibility and a business position.

Strong Financial Resources:

With its strong financial resources and advanced copper tube processing technology, our company holds an advantageous position in market share, brand value, technological content, and product quality, becoming a preferred supplier for many listed groups.

Large Scale Production:

The company occupies an area of over 20,000 square meters, with a construction area of 12,800 square meters. In 2022, our annual production exceeded 7,500 tons, with a value output of up to 450 million yuan, demonstrating our strong production capacity and market competitiveness.

Comprehensive Industry Chain:

Jingliang has now developed into a complete industrial chain integrating smelting, extrusion, drawing, precision rolling, and annealing. It has been awarded multiple honors, including "Top Ten Copper Tube Enterprises" and "Leading Taxpayer in the Copper Tube Industry".

Smart Manufacturing:

Jingliang Copper-Tube Products will better integrate the concept of factory construction into its corporate development strategy, insist on refining technology and polishing products more finely, and the future of "intelligent manufacturing".

Genuine Cooperation:

Zhejiang Jingliang Copper-Tube Products Co.,Ltd warmly welcomes friends from all walks of life to visit and offer guidance. We look forward to joining hands with you to create a brilliant future together.

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