Air Conditioning Copper Pipes
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Air Conditioning Copper Pipes

Standard：ASTM B280,ASTM B68,ASTM B75,ASTM B88 JIS H3300 EN12735,AS1571
Shape Type：Straight Round,Square,Rectangular,Coil,Oval,Half-Round
Wall Thickness：0.2-3mm
Out Diameter：3mm-100mm
Length：1M-6M or As your demand （Pancake copper tube usual length: 15 meters）
Temper：Soft(M),Half Soft(M2) and Half Hard(Y2)
Surface Treatment：Bright and Clean
Package Type：Plastic Film With Plastic Caps on the both ends and Wooden Case Carton Package or as your demand

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Product Introduction

Gnee Steel (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of air conditioning copper pipes in China, also supports customized service. Welcome to buy discount air conditioning copper pipes for sale here from our factory. Quality products and reasonable price are available.

Copper tubes are widely used in air conditioning refrigerant pipelines due to their high thermal conductivity, corrosion resistance and processing performance. Copper tubes can withstand greater working pressure, have a longer service life, and are superior to other materials in cooling effect, so they have become the preferred material for air conditioning systems.

Why do air conditioners use copper tubes instead of stainless steel tubes?

Thermal conductivity crushing

The thermal conductivity of copper is 25 times that of stainless steel, and the refrigerant can instantly complete heat exchange when it flows through the copper tube. This high-efficiency heat conduction directly determines the cooling speed of the air conditioner, and the "insulation" property of stainless steel is actually a disadvantage in the refrigeration system.

Ductility rescue construction

When the installer manually bends the copper tube at the corner of the wall, the copper tube will only deform but not crack. If the stainless steel tube encounters this situation, it is very easy to produce metal fatigue cracks, and the risk of refrigerant leakage in the later stage will increase sharply, and repairing it once is equal to the cost of replacing a new machine.

Surface protection comes with armor

After the surface of the copper tube is oxidized, a dense oxide film is generated to prevent further corrosion, and the interior remains smooth after twenty years of use. Stainless steel is prone to intergranular corrosion in a humid salt spray environment, especially in the external unit connection pipe section of high-rise residential buildings in coastal cities. This situation is particularly fatal.

Cost is not the only obstacle

Although stainless steel materials are about 30% cheaper, their processing requires complex processes such as laser welding. The equipment investment for a set of stainless steel pipe production line is 8 times that of copper pipes, and weld flaw detection must be performed after bending, so the overall production cost is higher.

Comparison of copper pipes used in air conditioners and other materials

Comparison Item	Copper Pipe	Aluminum Pipe	Galvanized Steel Pipe	PVC Pipe
Thermal Conductivity	Excellent (401 W/(m·K))	Moderate (237 W/(m·K))	Poor (50 W/(m·K))	Very poor (0.19 W/(m·K))
Corrosion Resistance	Naturally corrosion-resistant	Forms oxide layer, may corrode	Rusts when coating damaged	Chemically resistant but brittle
Mechanical Strength	High ductility, pressure-resistant	Soft, prone to deformation	Rigid but cannot bend	Low strength
Seal Integrity	Excellent welded joints	Requires special welding	Depends on flange connections	Glue joints may leak
Installation	Lightweight, easy to work with	Light but needs special tools	Heavy, complex installation	Light but fragile
Applications	Refrigerant lines, high-pressure	Low-pressure refrigerant	Water circulation systems	Drainage only
Lifespan	20-30 years	10-15 years	5-10 years	5-10 years
Environmental Impact	Fully recyclable	Recyclable but degrades	High maintenance pollution	Non-degradable
Cost	Higher cost	Lowest cost	Moderate cost	Lowest cost

specific applications of copper pipes in air conditioning systems

Refrigerant Circulation Piping (Core Application)

High-pressure gas pipes between compressor and condenser

Liquid pipes between condenser and throttling device (expansion valve/capillary tube)

Low-pressure suction pipes between evaporator and compressor

Heat Exchanger Components

Coils inside condensers

Coils inside evaporators

Connection Piping

Connecting pipes between indoor and outdoor units

Branch pipes between branch joints and indoor units

Special Components

Inlet/outlet pipes for liquid receivers

Oil separator circuits

Microchannel Systems (New Applications)

Header pipes for microchannel heat exchangers

Chemical content of commonly used air conditioning copper tube grades

U.S. Copper Grade	UNS Number	Chemical Composition	HVAC Applications
ACR Copper	C12200	Cu ≥99.9%, P: 0.015-0.040%	Refrigerant lines, coils
DHP Copper	C12200	Cu ≥99.9%, P: 0.015-0.040%	Heat exchangers
OF Copper	C10200	Cu ≥99.95%, O: <0.0005%	Critical refrigerant circuits
DLO Copper	C12000	Cu ≥99.9%, P: 0.004-0.012%	Small-diameter tubing
ETP Copper	C11000	Cu ≥99.9%, O: 0.02-0.04%	Water piping, drains

Copper Pipe Sizes for Air Conditioning

Insulated Copper Pipe Air Conditioning Straight length Form

AC Copper Piping Internal working pressure at 150°F (65°C)		O.D. in mm	O.D. in inches	WT in mm	WT in inches	Weight (kg) per metre	Weight (kg) per foot
BAR	PSI
120	1742	9.53	3/8″	0.8	0.031	0.194	0.059
90	1304	12.7	1/2″	0.8	0.031	0.266	0.081
90	1304	15.88	5/8″	1	0.039	0.41	0.125
60	868	19.05	3/4″	0.8	0.031	0.407	0.124
75	1086	19.05	3/4″	1	0.039	0.512	0.156
51	744	22.22	7/8″	0.8	0.031	0.476	0.145
64	930	22.22	7/8″	1	0.039	0.613	0.187
50	716	25.4	1″	0.88	0.035	0.59	0.18
56	814	25.4	1″	1	0.039	0.699	0.213
50	723	28.58	1-1/8″	1	0.039	0.768	0.234
50	716	31.75	1-1/4″	1.1	0.043	0.945	0.288
50	716	34.93	1-3/8″	1.21	0.048	1.151	0.351
50	716	38.1	1-1/2″	1.32	0.052	1.368	0.417
50	716	41.28	1-5/8″	1.43	0.056	1.601	0.488
50	720	44.45	1-3/4″	1.55	0.061	1.883	0.574
47	681	53.98	2-1/8″	1.78	0.07	2.601	0.793

Copper Tubes for Air Conditioner Soft Coil Form

Copper Tubes For Air Conditioning Internal working pressure at 150°F (65°C)		O.D. in mm	O.D. in inches	WT in mm	WT in inches	Weight (kg) per metre	Weight (kg) per foot
bar	psi
91	1319	6.35	1/4″	0.8	0.032	0.125	0.038
60	876	9.53	3/8″	0.8	0.032	0.194	0.059
45	656	12.7	1/2″	0.8	0.032	0.266	0.081
45	656	15.88	5/8″	1	0.04	0.413	0.126
38	546	19.05	3/4″	1	0.04	0.512	0.156

Maintenance measures for air-conditioning copper pipes

HVAC copper pipes

It is necessary to check the air conditioning refrigeration copper pipe regularly to reduce the chance of fluorine leakage in R410a air conditioning copper pipes, and also reduce the shrinkage or cracking of air conditioning copper pipes due to insufficient refrigerant.

To avoid frost on the outdoor unit air conditioning connection copper pipe, it is necessary to regularly check whether the protective film of the air conditioning connection copper pipe is damaged, which can reduce the frost phenomenon of the air conditioning connection copper pipe due to long-term outdoor use.

Clean the air conditioner regularly to avoid dust and fine substances being brought into the air conditioning copper pipe during the air conditioning refrigeration process, protect the cleanliness of the air conditioning copper pipe, prevent leakage of the air conditioning copper pipe due to bacteria, and extend the service life of the air conditioning copper pipe.

Plant and equipment

Packaging and shipping

Customer visits

GNEE is an enterprise engaged in the research, smelting and processing of copper and copper alloys. The factory covers an area of 350,000 square meters, and now has a series of production equipments such as vacuum induction furnace imported from the United States, vacuum consumable arc furnace made in Germany, 2800mm four-high reversible rolling mill, vacuum annealing furnace, and so on, which can customize the production of any size of plate within 2.6m * 16m, and the maximum length of a single pipe can reach 15m.
Meanwhile, we also have more than 100 sets of various testing instruments, the main equipment includes American non-destructive testing system, spectral analyzer, carbon and sulfur tester, universal testing machine, ultrasonic testing system, fatigue testing machine and so on.
With more than 10 years of export experience, our products are exported to USA, UK, Germany, France, Brazil, Japan, Korea, India, Vietnam, Australia, Philippines, Zambia, Indonesia and other countries.

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