KTG Cu‑Al Connection Energy Saving

Air Conditioner Tube KTG RAMA Cu‑Al Connection Pipe Set

RAMA air conditioner tube set adopts Resistance Welding to effect seamless. 4MPa air tightness test, no distortion. Burst pressure ≥13 MPa, no leakage. The leakage rate in weld joint is less than 10ppm. Compared to other Cu‑Al connection pipe set suppliers, RAMA air conditioner tube set has higher quality and more competitive prices. Random length of our Air conditioner tube set is available. There are 3 types of insulation cottons available: economical type (grey), standard type (black) and luxury type (white).

RAMA Technology Advantage

Patented innovations for superior performance

Resistance Welding Technology

With resistance welding technology, RAMA Cu‑Al connection pipe is tested & approved by State Key Laboratory of CONNECTING TECHNIC CENTER of HARBIN INSTITUTE OF TECHNOLOGY. Our Cu‑Al connection pipe performs very well during the test of Pull Off, Pressure and Bending, Burst Pressure ≥13 MPa.

Inclusive Pipe End Expansion Technology【RAMA patent】

When ID ≤3.2mm in size of Ø6.35 air conditioner pipe set, block phenomenon may occur. RAMA adopts Pipe End Expansion technology to ensure ID ≥3.3mm, meeting requirements and avoiding block phenomenon.

Sealing Accessories Protection【RAMA patent】

Hot Melt Adhesive Sleeve (exclusive tech) at the weld point adheres the RAMA Air conditioner tube and Cu‑Al connection pipe tightly, isolating moisture and preventing corrosion completely.

RAMA Air Conditioner Tube【RAMA patent】

The Cu‑Al connection pipe is protected by RAMA Air conditioner tube (heat shrink tubing special for RAMA Cu‑Al connection pipe), halogen free, anti‑corrosion, flame‑retardant and environment friendly material, building dual protection when working along with Hot Melt Adhesive Sleeve.

Test Standard

Rigorously tested for quality assurance

Point of weld

No pores, cracks, welding tumor, burr, badly burned, no block or obvious narrowing inside

Air tightness

All RAMA Air conditioner tube set pass 4MPa air tightness test

Bend

No crack in 180° angle bend

Sealing

Tube shrinks completely, hot melt adhesive sleeve melts completely, cannot be moved after shrink/melt; covers entire weld joint

RAMA Al‑Cu Connection Pipe Set vs Full Cu Pipe Set

Aspect	RAMA Al‑Cu Connection Pipe Set
Energy saving	Thermal coefficient of Al is lower than Cu, decreases loss during temperature transfer; RAMA Air conditioner tube improves insulation effect.
Resources	Al production ranks second in metal production, helps relieve Cu resource shortage; aluminum price is more stable.
Cost savings	Cu price is approximately 4.5 times that of Al.
Mature technology	Tested & approved by State Key Laboratory of HIT. Meets all requirements: air tightness, bend, corrosion prevention, mechanical properties, internal cleanness – same performance as full Cu pipe.
Easy installation	Except for cutting (do NOT cut due to aluminum’s welding performance), no differences in installation. Aluminum has better bend character and is lighter, making installation easier.

Standard Specifications

Outer diameter (mm/inch) and typical application (HP)

O.D. mm (inch)	Application
Ø6.35(1/4") + Ø9.52(3/8")	1P
Ø6.35(1/4") + Ø12.7(1/2")	1.5P~2P
Ø9.52(3/8") + Ø15.88(5/8")	3P
Ø9.52(3/8") + Ø19.05(3/4")	＜5P
Ø12.7(1/2") + Ø19.05(3/4")	5P