| Variety | Grade | state | shape | Specification (mm) | use | Executive standard | 
| Copper tube series |       T2       TP2  |            M(Soft)       Y2(1/2 Hard) Y(Hard)  |      Straight |       Outer diameter: φ3-328.0       Wall thickness (W.T.): 0.5-15.0  |            Air conditioning pipe       Heat exchanger tube Water and gas pipeline  |            GB/T 1527-2017       GB/T 18033-2017 ASTM B88M-2013  |     


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