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Zhejiang Jingliang Copper-Tube Products Co., Ltd

Wholesale Hard Drawn Copper

Hard Drawn Copper

-- Steady & Reliable Manufacturer --

The Strength Benchmark for Industrial Piping Systems

Hard drawn copper, often referred to as "Rigid Copper," is the structural powerhouse of the copper tubing world. Unlike annealed copper, hard drawn tubing is not heat-treated after the final drawing process. This "cold working" aligns the grain structure of the metal, significantly increasing its tensile strength and hardness. At Zhejiang Jingliang, our hard drawn tubes are manufactured to provide maximum structural integrity, ensuring they remain perfectly straight over long spans without sagging. This makes them the preferred choice for mechanical rooms, high-pressure industrial lines, and large-scale commercial plumbing where the pipe is often exposed and must maintain a neat, professional appearance. The "H58" temper of our hard-drawn pipes ensures that they can withstand much higher internal pressures and external mechanical stresses than their soft counterparts.

Because hard drawn copper cannot be bent by hand, it is used in conjunction with a wide array of fittings—elbows, tees, and couplings—which are typically joined by brazing, soldering, or modern press-connect systems. Our production process involves high-precision extrusion followed by multiple draw-bench stages to achieve exact tolerances. This precision is vital for the modern "Press-Fit" industry, where the outside diameter of the tube must be perfect to ensure a watertight O-ring seal. We produce hard drawn tubes in Types K, L, and M, as well as ACR sizes. Each pipe is marked with its specification, ensuring easy identification for building inspectors. By choosing Jingliang's hard drawn copper, you are opting for a "lifetime" material that offers zero permeability to oxygen and gases, high fire resistance, and a level of durability that synthetic materials simply cannot match in commercial environments.

Rigid Pipe Mechanical & Structural Specs

PropertyHard Drawn (H58) Specification
Tensile Strength≥ 330 MPa (Stronger than Soft)
Rockwell Hardness≥ 70 HR30T
Modulus of Elasticity115 GPa
Temper DesignationH58 (Hard) / H55 (Half-Hard)
Density8.94 g/cm³
Standard Lengths3m, 5.8m, 6m (Straight)
Max Working Temp204°C (Depends on Joining Method)
Surface FinishPolished, Mill Finish
Dimensional Tolerance± 0.05mm on OD
Conductivity≥ 100% IACS

High-Pressure and Large-Scale Infrastructure

Hard drawn copper tubes are the primary choice for Main Water Risers in high-rise buildings, where the vertical pressure from the height of the building requires a rigid, high-strength material. They are the standard for Fire Sprinkler Systems due to their ability to withstand intense heat without failing. In the HVAC world, large-diameter hard tubes are used for Chiller Headers and Cooling Tower piping. They are also essential for Medical Gas Systems (Oxygen, Nitrogen, Med-Air) in hospitals, where the rigid pipe prevents the sagging that could trap moisture in the lines. Industrial applications include Compressed Air Systems, Hydraulic Fluid lines, and Steam Condensate return lines. Additionally, they are used in Shipbuilding for fuel and water lines due to their resistance to the harsh marine environment and their ability to be securely clamped to the ship's structure.

Structural Integrity and System Longevity

The "High Tensile Strength" of hard drawn copper allows for thinner walls to be used for higher pressures compared to other materials, leading to "Material Savings." Its "Rigid Nature" means it requires fewer hangers and supports, which "Reduces Installation Complexity" and costs in large commercial projects. Our tubes offer "Excellent Hydraulic Flow," with a smooth interior that resists the buildup of scale or biofilm, ensuring "Constant Flow Rates" over decades of use. Copper's "Fire Safety" is a major advantage; it doesn't burn, support combustion, or emit toxic fumes in a fire. The "UV Stability" of hard drawn copper means it can be installed outdoors without the degradation seen in plastic pipes. Furthermore, it is "100% Recyclable," contributing to green building certifications like LEED. Finally, the "Aesthetic Appeal" of a straight, rigid copper installation is often a point of pride for mechanical contractors and building owners alike.

Bundle Packaging and Global Shipping

Straight hard pipes are packed in hexagonal bundles, secured with steel straps and wrapped in heavy-duty plastic to protect against moisture and surface oxidation. For sea freight, we often use wooden crates or "steel frames" to prevent the pipes from bending under the weight of other cargo. Payment is accepted via T/T or L/C at sight. We provide comprehensive documentation, including Mill Test Certificates and compliance reports for international standards (ASTM, EN, AS/NZS). Shipping from Ningbo allows us to reach global markets efficiently. For distributors, we offer custom inkjet marking on the pipe every few feet, allowing for easy "Job-Site Traceability" and branding.

  • Q: Can hard drawn pipe be bent with a tool?
  • A: Small diameters can be bent with specialized mechanical benders, but large diameters will kink. It is generally intended to be used with fittings.
  • Q: Is it compatible with press-connect fittings?
  • A: Yes, our hard drawn pipe is manufactured to the precise OD tolerances required by major press-fit brands like Viega and Nibco.
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 Hard Drawn Copper and Hard Drawn Copper 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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