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Zhejiang Jingliang Copper-Tube Products Co., Ltd

Wholesale Type L Copper Pipe

Type L Copper Pipe

-- Steady & Reliable Manufacturer --

The Versatile Mid-Weight Standard for Modern Plumbing

Type L copper pipe is widely considered the "Standard" for residential and commercial plumbing and heating systems. It offers a medium wall thickness—thicker than Type M but thinner than Type K—providing the perfect balance between durability and cost-effectiveness. At Zhejiang Jingliang, we manufacture Type L pipe to the strict ASTM B88 standard, ensuring that it meets the requirements of building codes worldwide. Because of its robust wall thickness, Type L is rated for a wide range of pressures and is suitable for both interior plumbing and certain exterior applications. It is available in both hard-drawn straight lengths and soft-annealed coils, making it a truly universal product for the modern contractor.

The "L" designation is a mark of quality that building inspectors look for in domestic water supply lines. Our Type L pipe is made from 99.9% pure copper, which provides natural antimicrobial properties, effectively killing 99.9% of bacteria within two hours of contact. This makes it an ideal choice for drinking water systems. In addition to water, Type L is frequently used for hot water heating systems (hydronics) and fire protection. Our manufacturing process ensures a "seamless" construction, which is vital for preventing leaks under high-pressure surges. The internal surface of our Type L pipe is ultra-smooth, which reduces friction and prevents the whistling or "water hammer" noise often associated with high-velocity water systems. Whether you are piping a new residential home or a large commercial office complex, Type L copper provides a reliable, long-lasting solution that outlasts competitive materials by decades.

Type L Dimensional & Pressure Ratings

Nominal Size (Inches)Outside Diameter (OD)Wall ThicknessSafe Working Pressure (PSI)
1/2" Type L0.625"0.040"722 PSI
3/4" Type L0.875"0.045"582 PSI
1" Type L1.125"0.050"494 PSI
1-1/4" Type L1.375"0.055"439 PSI
StandardASTM B88 / EN 1057------
Copper GradeC12200------
Internal FinishClean & Smooth------
Marking ColorBlue (Industry Standard)------

Domestic Water and Hydronic Heating

Type L copper pipe is the primary choice for Interior Domestic Water Supply lines (both hot and cold) in residential and commercial buildings. It is the standard material for Hydronic Heating Systems, including baseboard radiators and boiler loops, where its thermal conductivity and pressure rating are essential. In many jurisdictions, Type L is also approved for Underground Water Services and Fuel Gas piping (in its soft coil form). It is widely used in Fire Sprinkler Systems for residential homes and apartments. Additionally, Type L is used for Compressed Air piping in garages and light industrial shops. Its versatility also extends to solar thermal systems, where it handles the high temperatures and pressures of the transfer fluid. Because of its antimicrobial properties, it is also preferred for water lines in healthcare facilities and school kitchens.

Proven Performance and Universal Acceptance

The "Perfect Balance of Thickness" is Type L's main advantage, offering more corrosion resistance than Type M without the higher cost of Type K. It is "Universally Accepted" by building codes, making the permit and inspection process much easier for contractors. Our Type L pipe provides "Superior Joinability," performing excellently with soldering, brazing, or press-connect fittings. The "Long Service Life" is a key selling point; copper doesn't suffer from the embrittlement or "leaching" issues that some plastic pipes face over time. It offers "Complete Oxygen Barrier" protection, preventing the corrosion of expensive boiler components in closed-loop heating systems. Furthermore, the "Blue Color-Coding" ensures that the pipe is easily identifiable on the job site, preventing installation errors. Finally, the "High Resale Value" of copper scrap makes it a sustainable choice for building owners who consider the long-term lifecycle of their materials.

Global Distribution and Identification

We ship Type L copper pipe in 10ft or 20ft straight lengths and 60ft or 100ft coils. Each pipe is incised and ink-marked with a blue stripe to indicate it is Type L. For sea transport, we use heavy-duty bundling and protective end-caps. Payment terms are 30% T/T and 70% against documents. We are a regular exporter to the North American, Australian, and Middle Eastern markets, providing all necessary certifications to prove compliance with local standards (like NSF/ANSI 61 for potable water). Our logistics team is expert at managing "Mixed-Type" containers, allowing you to order Type K, L, and M in a single shipment to optimize your inventory costs.

  • Q: Why is Type L marked with a blue stripe?
  • A: The industry uses color-coding for safety and identification: Blue for Type L, Red for Type M, and Green for Type K. This helps installers and inspectors quickly verify the pipe grade.
  • Q: Can I use Type L for gas lines?
  • A: Yes, in many regions, soft Type L copper is a standard material for residential natural gas and propane lines. Always check local codes.
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 Type L Copper Pipe and Type L Copper Pipe 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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