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Zhejiang Jingliang Copper-Tube Products Co., Ltd

Wholesale Hard Drawn Copper Pipes

Hard Drawn Copper Pipes

-- Steady & Reliable Manufacturer --

The Strength of Hard-Drawn Engineering

Hard drawn copper pipes, also known as "H58" temper, are the rigid, high-strength solution for structural piping and industrial fluid transport. Unlike soft copper, hard-drawn pipes are not annealed after the final drawing process. This "work hardening" leaves the copper with a high tensile strength and a rigid structure that does not bend easily. Supplied exclusively in straight lengths, these pipes are favored for installations where aesthetic appearance, long spans without sagging, and high burst pressure are required. At Zhejiang Jingliang, our hard-drawn pipes are produced through a series of precision reduction stages that compress the grain structure of the copper, resulting in a pipe that is exceptionally tough and capable of withstanding significant mechanical stress. This makes it the standard choice for large-diameter mains in commercial buildings, hospitals, and industrial plants.

The rigidity of hard-drawn copper is its greatest asset in large-scale engineering. It allows for a clean, professional "manifold" look in utility rooms and ensures that the pipe maintains its alignment even when subjected to the thermal expansion and contraction of large-scale heating and cooling systems. Because it is harder than annealed copper, it is also more resistant to surface scratches and accidental dents during the construction phase. Our hard-drawn pipes are manufactured to meet the most stringent international standards, including ASTM B88 and EN 1057. Each length is precision-straightened to ensure that there is no "bow" or "warp," making it easy to install in long, horizontal runs with standard hangers and supports. By choosing Jingliang's hard-drawn copper, you are opting for a material that provides the structural integrity and high-pressure safety margins required by modern industrial and commercial infrastructure.

Technical Parameters & Strength Specs

PropertyHard Drawn (H58) Specification
Temper DesignationH58 (Hard) / R290 (EN Standard)
Tensile StrengthMin 310 MPa (45,000 psi)
Yield StrengthTypically 275 MPa
Hardness (Rockwell 30T)Min 55 HR30T
Straightness Tolerance< 1.2mm per meter (High Precision)
Elongation in 2 inchesMin 3% (Low Ductility)
Form FactorStraight Lengths (3m, 5.8m, 6m)
Surface FinishMill Finish / Polished
Standard TypesASTM Type K, L, M; EN Table X, Y

Applications in Structural Piping

Hard drawn copper is the primary material for commercial and residential water mains. Its rigidity makes it perfect for vertical risers in high-rise buildings, where the pipe must support its own weight and that of the water it carries. It is also the mandated standard for medical gas systems (according to NFPA 99), as the rigid pipe prevents accidental kinking that could block life-saving oxygen flow. In the HVAC industry, it is used for the main refrigerant "headers" in large chiller plants and VRF systems. Industrially, hard-drawn pipe is used for compressed air lines, fire sprinkler systems, and steam distribution lines where its high temperature and pressure resistance are critical. Because of its neat appearance, it is also frequently used in exposed installations, such as in modern industrial-style architecture or in technical rooms where all utility lines must be clearly organized and identifiable.

Advantages of Hard-Drawn Copper

The main advantage is mechanical strength; hard-drawn pipe has a significantly higher burst pressure than soft copper of the same wall thickness, allowing for higher safety margins in pressurized systems. Its rigidity means it requires fewer hangers and supports over long runs, which reduces installation costs. Unlike soft copper, hard-drawn pipe does not sag when heated, ensuring that fluid does not "pool" in low spots of the piping system. It is also much easier to cut and deburr, as the metal does not deform under the pressure of a tube cutter. For commercial projects, the primary advantage is the professional finish; the straight, rigid lines signify a high-quality installation. Additionally, hard-drawn copper is more resistant to "erosion-corrosion" caused by high-velocity water flow, making it the better choice for large-scale distribution systems where flow rates are high.

Payment, Logistics, and Bundle Shipping

Hard-drawn pipes are bundled in hexagonal shapes and secured with steel or plastic straps to ensure they stay straight during transport. We offer these in standard 5.8m lengths (to fit 20ft containers) or 6m lengths. Payment is typically T/T or L/C at sight. We take great care in the loading process, using specialized forklifts to ensure the pipes are not dented or bent. Each bundle is clearly labeled with the ASTM or EN grade, the heat number, and the size for full traceability. We can provide "half-bundles" for smaller wholesalers and can mix different sizes within a single container to help you manage your stock levels. Our mill certificates confirm the hard temper and tensile strength, ensuring your project meets all structural building codes. We also offer specialized packaging for medical-grade hard pipe, including individual bagging and capping.

  • Q: Can I bend hard-drawn pipe?
  • A: Hard-drawn pipe is not intended for bending. Attempting to bend it will usually cause it to collapse or crack. For changes in direction, you must use elbows and fittings.
  • Q: Is hard-drawn pipe more expensive?
  • A: The price per kilogram of copper is the same, but because it is supplied in straight lengths and requires fittings for every turn, the total installation cost may be different from using soft coils.
  • Q: Does it have better corrosion resistance than soft copper?
  • A: The chemical corrosion resistance is the same, but its harder surface makes it slightly more resistant to the physical erosion caused by high-speed water or particulates.
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 Pipes and Hard Drawn Copper Pipes 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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