Web Menu

Product Search

Language

Share

Zhejiang Jingliang Copper-Tube Products Co., Ltd

Wholesale Copper Coupling

Copper Coupling

-- Steady & Reliable Manufacturer --

The Seamless Connection for Continuous Piping

The Copper Coupling is the most essential fitting in any professional piping installation, used to join two straight lengths of copper tube with a permanent, leak-proof seal. At Zhejiang Jingliang, our couplings are manufactured via "Cold Forming" from seamless C12200 copper tube. This ensures that the fitting has the same metallurgical properties as the pipe it connects, preventing galvanic corrosion and ensuring identical thermal expansion rates. Our range includes "Straight Couplings" (with a center stop) and "Slip Couplings" (without a stop). Slip couplings are particularly valuable for repair work, as they can be slid completely onto one pipe and then moved back over the joint, making them ideal for "Cut-In" repairs in tight spaces where the pipes cannot be moved.

The quality of a coupling is determined by the precision of its "Socket Depth" and "Capillary Gap." Our fittings are engineered with tight tolerances to ensure that when solder or brazing alloy is applied, the "Capillary Action" draws the filler metal deep into the joint, creating a bond that is stronger than the pipe itself. Every Jingliang coupling is "Bright Annealed" and degreased, providing an oxide-free surface that requires minimal preparation for a perfect weld. Whether used in high-pressure medical gas lines or standard residential plumbing, our couplings are designed to meet the rigorous requirements of ASME B16.22, providing a lifetime of service without the risk of leaks or structural failure.

Connection & Material Integrity Specs

PropertyStandard Coupling Specs
Material GradeC12200 (DHP Copper)
Size Range6mm (1/4") to 108mm (4-1/8")
Fitting TypeStop (Dimpled) or Slip (No stop)
Wall ThicknessMatches Type L / K / M Tube
Standards ComplianceASME B16.22 / EN 1254-1
Working Temperature-200°C to +204°C
Pressure RatingUp to 700 PSI (Size & Temp dependent)
CleanlinessASTM B280 (ACR Cleaned)
Connection TypeCUP (Solder/Sweat)
Testing100% Dimensional Check

HVAC Line Sets, Potable Water, and Industrial Process Piping

Copper couplings are the "Primary Connector" for "HVAC Line Sets," joining standard lengths of tubing for long-distance refrigerant runs. In "Residential and Commercial Plumbing," they are used for every straight-line extension of water and gas systems. "Medical Gas Systems" utilize clean-grade couplings to maintain the integrity of oxygen and nitrogen lines. In "Industrial Compressed Air" networks, they provide a corrosion-resistant method of extending tool lines. They are essential for "Solar Thermal Loop" installations, connecting collectors to the pump station. In "Marine Plumbing," copper couplings are favored for their resistance to vibration and salt-air corrosion. Additionally, they are used in "Hydronic Heating" manifolds to connect multiple radiator circuits, and for "Fire Sprinkler Systems" where permanent, high-heat-resistant joints are required by safety codes.

Permanent Sealing and Ease of Installation

The primary advantage is "Unmatched Joint Strength"—a properly soldered coupling becomes a "Monolithic Structure" with the pipe, providing the highest leak resistance in the industry. Our "Precision-Machined Sockets" provide the "Optimal Capillary Gap," which "Reduces Solder Waste" and ensures a 100% fill every time. The "Smooth Internal Transition" minimizes turbulence and "Reduces Pressure Loss" across the system. Our couplings offer "High Thermal Compatibility," ensuring that the joint expands and contracts at the same rate as the pipe, "Preventing Fatigue Leaks." The "Slip Coupling Design" offers "Invaluable Flexibility for Repairs," allowing for fast fixes in inaccessible areas. Our fittings are "Bright Annealed," which "Saves Time on Preparation" and ensures a clean, oxide-free joint. Finally, the "Compact Profile" of the coupling allows for installation in narrow wall cavities or tight equipment housings where bulky mechanical press fittings might not fit.

Bulk Poly-Bagging and Export Logistics

Couplings are packed in "High-Density Poly-Bags" to prevent oxidation and then boxed in "Standardized Export Cartons." Payment is 30% T/T and 70% L/C. We ship from Ningbo, offering "Cleanliness Certification" for medical and refrigeration orders. For large distributors, we offer "Private Labeling" and "Barcoded Packaging" to streamline your retail or warehouse inventory management.

  • Q: What is a slip coupling used for?
  • A: A slip coupling has no internal "stop," allowing it to slide completely onto a pipe. It is perfect for repairing a broken pipe where you cannot move the pipes apart.
  • Q: Are these couplings compatible with R-410A?
  • A: Yes, they are designed for the high pressures of modern refrigerants, provided they are brazed correctly.
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 Copper Coupling and Copper Coupling 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.

Message Feedback

  • Copper Bushings
  • Copper Tee Fitting
  • Copper Capillary for Thermostats
  • Copper Nickel (CuNi) Tube
    • X Facebook
    Products News