AC Insulated Copper Tube Pair Coil | 99.9% Pure Copper | Pre-Insulated Split AC Connecting Pipe

Product brief description

Our pre-insulated copper tube pairs are engineered for split air conditioner refrigerant connections. Each coil set includes a liquid line and a suction line, both wrapped in thick closed-cell polyethylene insulation to prevent condensation, minimize energy loss, and withstand outdoor exposure. The seamless copper tube is manufactured from 99.9% pure electrolytic copper, degreased, dehydrated, and nitrogen-pressure-tested to guarantee leak-free performance. Available in all standard diameters and coil lengths — ready to ship for residential and commercial HVAC projects.

Product detailed description

Pure Copper, Zero Compromise

Copper quality directly determines refrigerant efficiency and system lifespan. Our tubes start from 99.9% pure electrolytic copper cathode, drawn into seamless tube under strict tolerance control. No welded seams, no impurities that cause pitting corrosion — just clean, consistent copper that transfers refrigerant with minimal pressure drop. Each batch ships with a material traceability certificate so you know exactly what's going into your installation.

Insulation That Actually Insulates

The difference between good and bad insulation shows up in the first summer. Our closed-cell PE foam insulation has a thermal conductivity below 0.035 W/(m·K), which means the cold stays in the tube where it belongs. No sweating, no dripping, no energy wasted cooling the ceiling cavity. Choose from 6 mm, 9 mm, or 13 mm wall thickness depending on your climate zone and local code requirements.

Clean Inside, Reliable Outside

Degreasing matters. Residual oil inside the tube reacts with refrigerant and clogs capillary tubes over time. Our factory process achieves residual oil below 20 mg/m² — well within international standards. After degreasing, every coil is dehydrated and sealed with nitrogen, then end-capped to keep moisture and contaminants out during shipping and storage.

Installer-Ready Features

Pre-flared ends on both liquid and suction lines save 15–20 minutes per installation and eliminate the most common leak point (bad field flares)

Brass flare nuts included — 45° SAE standard, compatible with all major AC brands

Color-coded insulation jacket: blue for suction line, black for liquid line (industry standard for easy identification)

Coil-packed with protective PE film wrap — uncoil smoothly without kinking

End caps and plugs keep the tube interior clean until the moment of installation

Product Specifications

FAQ

Q1: What is the difference between pre-flared and plain-end copper tubes? 

A: Pre-flared tubes arrive with factory-formed 45° flare ends and matching brass nuts already fitted on both the liquid and suction lines. This saves 15–20 minutes of on-site flaring and eliminates the risk of cracked or off-center field flares, which are the #1 cause of refrigerant leaks. Plain-end tubes require the installer to cut, deburr, and flare on-site. We offer both — pre-flared for speed and reliability, plain-end for custom-length installations.

Q2: Which insulation thickness should I choose? 

A: It depends on your climate and local building code:

When in doubt, 9 mm is the safe default for 90% of residential installations.

Q3: Is the copper tube 100% seamless? 

A: Yes. All our tubes are manufactured from solid copper billet via the piercing and cold-drawing process — no longitudinal welds. Seamless construction eliminates the weak point that welded tubes have at the seam, especially under the vibration and thermal cycling typical of AC refrigerant lines.

Q4: Can I use this tube with R32 or R290 refrigerant? 

A: Yes. Our copper tube is compatible with all common refrigerants, including R22, R410A, R32, R290 (propane), and R134a. The tube interior is degreased and dehydrated to standards suitable for both traditional and flammable refrigerants. For R290 installations, always follow your local safety code regarding charge limits and ventilation.

Q5: What does "degreased and dehydrated" mean, and why does it matter? 

A: During manufacturing, copper tubes retain traces of drawing oil. If not removed, residual oil reacts with refrigerant and compressor oil inside a running system, forming sludge that blocks capillary tubes and expansion valves. Degreasing removes the oil (we test to <20 mg/m²). Dehydration removes moisture, which would otherwise form ice crystals at the expansion device or react with refrigerant to produce corrosive acids. Our tubes are nitrogen-purged and end-capped immediately after processing to guarantee internal cleanliness.

Q6: Are the brass flare nuts included?

A: Yes — every pre-flared coil set includes four 45° SAE-standard brass flare nuts (two per tube line). They are pre-threaded onto the tube ends and protected with plastic end caps during shipping. If you need spare nuts or different thread sizes, contact us.

Q7: Can I get longer coils — 30 m, 50 m, or custom cut? 

A: Yes. Our standard coils are 15 m and 30 m, but we offer bulk coils up to 50 m, as well as custom-cut lengths for volume orders. Specify your requirement when inquiring, and we'll confirm feasibility and pricing.

Q8: Is the insulation UV-resistant for outdoor pipe runs? 

A: Yes. The outer PE jacket is formulated with UV stabilizers for outdoor exposure. However, for runs exceeding 5 meters of direct sunlight (e.g., rooftop solar-exposed sections), we recommend additional UV protective wrapping or conduit per standard HVAC practice. The insulation will not crack or powder within its rated lifespan under normal outdoor conditions.

Q9: What certifications do the tubes carry? 

A: We manufacture under ISO 9001 quality management. The copper tube conforms to ASTM B280 and EN 12735-1 standards. Mill test certificates (EN 10204 3.1) showing chemical composition, mechanical properties, and pressure test results are available on request with every shipment.

Q10: Can I customize the insulation color or print my brand on it? 

A: Yes. For bulk orders (MOQ 1,000 coil pairs), we offer custom insulation jacket colors, printed logo, and branded packaging. The standard colors are blue (suction) and black (liquid), but we can match your brand palette. Contact our OEM team for specifications and lead time.

Q11: How are the coils packaged to prevent damage during shipping? 

A: Each coil pair is individually wound, wrapped in protective PE film, and packed in a corrugated carton with internal dividers. End caps protect the pre-flared connections and brass nuts. For bulk sea freight, cartons are palletized and stretch-wrapped. Damage rates in transit are below 0.3%.