1P the specifications of air conditioning connecting pipes are 6.35mm (liquid) and 9.52mm (steam). Now, in order to reduce the cost, manufacturers have changed the wall thickness to 0.75mm (some profiteers also use 0.5). By weighing and looking at the appearance, we can roughly judge their quality and make a more accurate calculation according to the formula:

Ring area ≈ π× d× t; The density of copper is 8.9g/cm3, and the length of copper tube is 1m (standard unit length).

Therefore, the unit length of 6.35mm copper tube is about:133.16g/m; The unit length weight of 9.52mm copper tube is:199.64 g/m.

Two plus one should be about 332.80 g/m.