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Air conditioner connection pipe

Air conditioner&Heat pump connection copper pipe details:

1. Suggestion sizes of air-conditioning pipe insulation (double pipe/single) Parameters (For R410A and R32 refrigerant)

specification	size of aluminum tube	size of insulation tube	wall thickness of insulation tube
1/4”+3/8”	6.35×0.8+9.52×0.8mm	φ8+φ12	8mm+8mm
1/4”+1/2”	6.35×0.8+12.70×0.8mm	φ8+φ14	8mm+8mm
1/4”+5/8”	6.35×0.8+15.88×1.0mm	φ8+φ18	8mm+8mm
3/8”+5/8”	9.52×0.8+15.88×1.0mm	φ12+φ18	8mm+8mm
3/8”+3/4”	9.52×0.8+19.05×1.0mm	φ12+φ22	8mm+8mm
1/2”+3/4”	12.70×0.8+19.05×1.0mm	φ14+φ22	8mm+8mm
7/8"	22.22x1.15mm		9mm/13mm/25.4mm
1-1/8"	28.6x1.25mm		9mm/13mm/25.4mm

2.Suggestion sizes of air-conditioning pipe insulation(double pipe/single) Parameters (For R404A, R407C, R507A, R134A and R22 refrigerant)

specification	size of aluminum tube	size of insulation tube	wall thickness of insulation tube
1/4”+3/8”	6.35×0.6+9.52×0.6mm	φ8+φ12	8mm+8mm
1/4”+1/2”	6.35×0.6+12.70×0.6mm	φ8+φ14	8mm+8mm
1/4”+5/8”	6.35×0.6+15.88×0.8mm	φ8+φ18	8mm+8mm
3/8”+5/8”	9.52×0.6+15.88×0.8mm	φ12+φ18	8mm+8mm
3/8”+3/4”	9.52×0.6+19.05×0.8mm	φ12+φ22	8mm+8mm
1/2”+3/4”	12.70×0.6+19.05×0.8mm	φ14+φ22	8mm+8mm
7/8"	22.22x1.15mm		9mm/13mm/25.4mm
1-1/8"	28.6x1.25mm		9mm/13mm/25.4mm