... Size, Wall Thickness, Standard Length of Drawn Type K copper tube Nominal SizeActual SizeWall ThicknessStandard LengthTemperininmminmminmm1/43/89.520 ... used for domestic water, service and distribution, fire protection, solar, fuel and oil, HVAC, compressed air, oxygen, LPG gas ... melting, steam and vacuum systems. -copper tubes of type K can be used sweat, flared and compression fittings. Available ...