Implementation standards
Seamless copper tubes for air conditioning and refrigeration equipment GB/T 17791-2007
Seamless copper tubes for cables
Seamless round copper tubes for electrical conduction GB/T 19850-2005
Oxygen-free copper tubes for magnetrons GB/T 20301-2006
Seamless internally threaded copper tubes GB/T 20928-2007
Weight calculation
, Red copper is pure copper: Pure copper is purple-red, also known as red copper. The density of pure copper is 8.96, and the melting point is 1083℃.
The mass of the red copper tube is calculated as follows: G=8.96πδ(D-δ)/1000
G: mass kg δ: tube wall thickness mm D: tube diameter mm
The grades of copper suitable for making red copper tubes are T1 and T2.
T1T2
Chemical composition of T1: Cu+Ag99.95%, P0.001%, Bi0.001%, Sb0.002%, As0.002%, Fe0.005%, Ni0.002%, Pb0.003%, Sn0.002%, S0.005%, Zn0.005%, O0.02%.
Chemical composition of T2: Cu+Ag99.95%, Bi0.001%, Sb0.002%, As0.002%, Fe0.005%, Pb0.005%, S0.005%.
Thermal conductivity (λ) 384/W·(m·K)-1
Specific heat (C) 0.394/kj·(kg·K)-1
