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Zhejiang Jingliang Copper-Tube Products Co., Ltd

Wholesale Metric Size Copper Tubing

Metric Size Copper Tubing

-- Steady & Reliable Manufacturer --

Global Compatibility with Metric Engineering Standards

Metric size copper tubing is the primary standard for plumbing, HVAC, and industrial engineering across Europe, Asia, and most of the world outside North America. While inch-sized tubing is common in the US, metric sizes (measured in millimeters) are the foundation of international building codes and OEM manufacturing specifications. At Zhejiang Jingliang, we produce a comprehensive range of metric copper tubing, from ultra-small 2mm capillary tubes to large 219mm industrial mains. These tubes are manufactured to comply with international standards such as EN 1057 (Europe), JIS H3300 (Japan), and GB/T 18033 (China). The transition to metric sizing is not just about units; it is about ensuring precision fitment with a global ecosystem of pumps, valves, and fittings. Our metric tubes are produced with the highest level of concentricity and wall thickness accuracy, ensuring they perform reliably in high-pressure modern systems.

The move toward metrication in the global HVACR industry has been driven by the need for standardization in large-scale international projects. For example, a VRF system designed in Japan or Europe will almost exclusively specify metric piping. Using the correct metric size is essential to maintain the hydraulic calculations of the system; substituting an "almost-close" inch size can lead to improper flow velocities and reduced efficiency. Our metric copper tubing is bright annealed and cleaned to meet the highest ACR (Air Conditioning and Refrigeration) standards. We use high-purity C12200 phosphorus-deoxidized copper, providing the necessary ductility for the metric press-fit and compression systems that are standard in the EU and UK. Whether you are working on a commercial skyscraper in Dubai or a manufacturing plant in Germany, our metric-sized copper provides the universal compatibility and technical excellence required for international success.

Metric Technical Parameters & Sizing

PropertyMetric Specification
Common Diameters (mm)6, 8, 10, 12, 15, 22, 28, 35, 42, 54, 108
Standard Wall Thickness0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.5mm, 2.0mm
Material GradeC12200 (Cu-DHP) / CW024A
Standard ComplianceEN 1057, JIS H3300, AS 1432, GB/T 1527
Temper OptionsR220 (Soft), R250 (Half-Hard), R290 (Hard)
Pressure RatingCalculated per EN 13480 Standards
Cleanliness StandardEN 12735-1 (Refrigeration) / EN 13348 (Medical)
Tolerance (OD)±0.03mm to ±0.06mm (ISO Metric)
Surface ConditionBright Annealed / Degreased / Capped

Applications in International Infrastructure

Metric copper tubing is used in nearly every phase of modern infrastructure outside the US. In the UK and Europe, it is the standard for domestic water supply and central heating systems (particularly 15mm and 22mm sizes). In the Middle East and Asia, metric tubing is widely used for medical gas networks in hospitals and as the primary refrigerant piping for commercial HVAC systems. Industrially, it is used for fluid transport in European-designed chemical and automotive manufacturing plants. It is also the standard for solar thermal collectors and heat pump installations, which are predominantly metric-based technologies. Furthermore, our metric tubing is essential for OEM manufacturers of appliances, automotive oil coolers, and laboratory equipment that are built for export to the global market. Its universal sizing makes it easy to source matching metric fittings and valves in any country following the SI unit system.

Advantages of Standardized Metric Tubing

The main advantage is "Seamless International Integration." By using metric sizes, you ensure that your piping system is fully compatible with the vast majority of the world's pumps, sensors, and fittings, eliminating the need for expensive adapters. Another advantage is "Precision Design." Metric wall thicknesses are often specified in 0.1mm increments, allowing for more precise material optimization and cost-saving without compromising safety. Our metric tubing's high surface quality and dimensional accuracy make it ideal for modern "Press-fit" connection technology, which is the preferred installation method in Europe for its speed and safety. Additionally, copper is naturally antimicrobial and 100% recyclable, fitting the strict environmental "Green" building codes common in metric-standard countries. Finally, the use of metric tubing simplifies international procurement and technical documentation, reducing the risk of errors in multi-national project teams.

Logistics, Sizing Variety, and Payment

We maintain one of the largest inventories of metric-sized copper in Asia, allowing for rapid fulfillment of international orders. Payment is typically T/T or L/C. We ship metric tubes in all formats: 3m/6m straight lengths, pancake coils, and large LWCs. To ensure smooth delivery, we label all bundles and boxes with both the metric size and the corresponding international standard (e.g., "15mm x 1.0mm EN 1057"). Packaging is optimized for international sea-freight, using reinforced wooden crates and moisture-proof plastic wrapping. We provide full documentation, including Mill Test Certificates and Certificates of Origin, to ensure smooth customs clearance in your destination country. Whether you need a small batch of specialized metric capillary tubes or a full container of standard plumbing sizes, our logistics team ensures a transparent and efficient delivery process.

  • Q: Is 15mm copper the same as 1/2 inch?
  • A: No. 15mm is exactly 15mm, whereas 1/2 inch is approximately 12.7mm. They are not interchangeable and require different fittings. We provide both to ensure you get the exact size you need.
  • Q: What is the most common metric size for refrigeration?
  • A: For metric systems, 6mm, 10mm, 12mm, and 15mm are very common for small to medium refrigeration lines.
  • Q: Do your metric tubes comply with the CE mark?
  • A: Yes, our metric tubes manufactured to EN 1057 and EN 12735-1 standards are fully compliant with the relevant EU directives for construction and pressure equipment.
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 Metric Size Copper Tubing and Metric Size Copper Tubing 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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