Ningguo Kingcool Import and Export Co., Ltd is a China-based Refrigeration Parts-Copper Tube Manufacturers and one-stop supplier of air conditioner and refrigerator accessories. Our copper tube range covers pancake coil copper pipe and aluminum installation kits used for refrigerant lines, split-system connections and service work.
We combine industry and trade: our own capacitor production runs on high-precision slitting and winding equipment, while our accessory business supplies a complete range of refrigeration, air conditioning and appliance parts. Copper tube orders are configured around tube diameter, wall thickness, coil length, temper and packing so the material arrives ready for the line or the service van.
Our Copper Tube Range
The copper tube line is built around two product families that cover most refrigerant piping requirements in air conditioning and commercial refrigeration.
Pancake Coil Copper Pipe
Soft-temper copper coil supplied in pancake form for split air conditioners, condensing units and refrigeration assemblies. Outer diameters from 3/16" through 7/8" are available, with wall thickness and coil length selected to match the working pressure and the installation method.
- OD range: 3/16", 1/4", 3/8", 1/2", 5/8", 7/8"
- Coil format for field bending and flare or braze joints
- Clean, dry interior suitable for refrigerant circuits
Installation Kit Aluminum Pipe
Pre-cut aluminum connection pipe supplied as an installation kit for air conditioning projects. Lengths are produced to the customer's required dimension, and the kit format suits distributors and installers who need a complete line set rather than loose coil.
- Length cut to customer requirement
- Kit packing for installation and service channels
- Pairs with insulation and fittings from our refrigeration range
Where Copper Tube Fits in the System
Copper tube is the refrigerant carrier between the outdoor condensing unit and the indoor evaporator, and it also appears inside commercial refrigeration assemblies, display cabinets and cold-room piping. Selection is driven by the circuit, not by the tube alone.
| Application | Typical Tube Choice | What We Confirm |
|---|---|---|
| Split AC line set | 1/4" and 3/8" pancake coil | Coil length, wall thickness, flare or braze ends |
| Multi-split and VRF branch piping | 1/2", 5/8", 7/8" coil | Diameter schedule and pressure rating |
| Commercial refrigeration piping | 3/16" to 5/8" coil | Temper, cleanliness and packing for site cutting |
| Installation kit supply | Aluminum pipe cut to length | Length, kit contents and labeling |
Material and Specification Variables
Refrigeration-grade copper is selected for thermal conductivity, ductility and resistance to the pressures and temperatures found in a sealed refrigerant circuit. The variables that change from project to project are straightforward, and each one affects how the tube behaves during bending, flaring and brazing.
- Outer diameter: matched to the compressor capacity and the refrigerant line sizing of the system.
- Wall thickness: set by the design working pressure and the mechanical stress during installation.
- Temper: soft coil for field bending; harder condition where straight runs are preferred.
- Coil or straight length: pancake coil for flexible routing, cut lengths for kit packing.
- Surface and interior condition: clean, dry bore to protect the refrigerant circuit and the expansion device.
- End preparation: plain, capped or prepared for flare and braze connections.
Configuration Options We Support
Because we operate as an accessory supplier across air conditioning and refrigeration, copper tube is usually ordered together with the parts that complete the line. We configure the tube to fit the rest of the bill of materials rather than treating it as a standalone item.
- Diameter and wall thickness combinations per line size
- Coil weight and length to suit handling and freight
- Kit assembly with insulation tuber and connection accessories
- Mixed containers combining tube with Refrigeration Parts such as brass and copper fittings, filter driers and control valves
- Private-label and neutral packing for distributor programs
Quality Control and Acceptance
Our capacitor production runs on high-precision slitting and winding equipment with testing equipment monitoring output during production, and the same discipline of documented inspection applies to the accessory range we supply. Copper tube is checked for dimensions, surface condition and packing integrity before shipment.
- Dimensional check on outer diameter and wall thickness
- Visual inspection for dents, oxidation and coil deformation
- Bore cleanliness verified before end capping
- Packing and labeling checked against the order specification
Installation, Handling and Serviceability
Copper coil is annealed for bending, but it still needs correct handling on site. We supply the tube in coil weights that suit the installation method and provide guidance on cutting, reaming, capping and purging so the circuit stays dry before the system is evacuated and charged.
- Keep coil ends capped until the joint is made
- Use a tube cutter and reamer to avoid swarf entering the circuit
- Purge with dry nitrogen during brazing
- Support long runs to prevent vibration fatigue at the joints
- Store coils indoors, off the floor, away from moisture
Information We Use to Configure Your Solution
A copper tube quotation is only useful if it matches the system it will serve. We prepare the configuration and price from the following project inputs.
| Input | Why It Matters |
|---|---|
| Tube outer diameter and wall thickness | Defines line sizing and pressure capability |
| Coil length or cut length per kit | Sets packing format and freight weight |
| Application and refrigerant | Confirms material compatibility and cleanliness requirement |
| End preparation and accessories | Determines whether fittings and insulation are included |
| Quantity and delivery schedule | Drives production planning and container loading |
| Packing and labeling requirements | Matches distributor or project site needs |
One-Stop Supply Across the Refrigeration Range
Copper tube rarely ships alone. Our wider catalogue covers the components that complete an air conditioning or refrigeration installation, which lets a project consolidate purchasing and container loading with a single supplier.
- Air-Conditioner Parts including compressors, motors, sensors and control components
- Brass and copper fittings, filter driers, oil separators and vibration absorbers
- Refrigerant, vacuum pumps, manifold gauges and leak detectors for service work
- Capillary tube and charging valve assemblies for small refrigeration circuits
Frequently Asked Questions
What copper tube sizes does Kingcool supply?
Our pancake coil copper pipe is offered in outer diameters of 3/16", 1/4", 3/8", 1/2", 5/8" and 7/8", with wall thickness and coil length selected for the application. Aluminum installation pipe is cut to the length required by the customer.
Can copper tube be combined with other parts in one order?
Yes. We supply copper tube alongside fittings, insulation, filter driers, control valves and the wider air conditioning and refrigeration accessory range, so a mixed container can be planned around one delivery schedule.
How is the tube packed for export?
Coils are packed to protect the bore and the coil shape during transport, with end caps fitted and labeling matched to the order specification. Kit formats for aluminum pipe are packed for installation and distribution channels.
What information is needed to prepare a quotation?
Send the tube diameter and wall thickness, coil or cut length, application and refrigerant, end preparation, quantity, delivery schedule and packing requirements. With those details we can confirm the configuration and prepare a price.
Do you support private-label packing?
We support neutral and customer-branded packing for distributor programs. Label content, carton marking and kit composition are agreed before production.
