紫铜管标称直径（mm）8,10,15,20,25，32,40，50,65,80,100,125,150，in 1/4 3/8 1/2 5/8 3/4 1 1 1/4 1 1/2 2 2 1/2 3 3 1/2 4 5 6
平均外径（mm）9.52,12.7,15.88,19.05,22.22,28.58,34.92,41.28,53.98,66.68,79.38,92.08,104.78,130.18,155.58 K级0.89,1.24,1.24,1.24,1.65,1.65,1.65,1.83,2.11,2.41,2.77,3.05,3.40,4.06,4.78
壁厚（mm）L级 0.76,0.89,1.02,1.07,1.14,1.27,1.40,1.52,1.78,2.03,2.29,2.54,2.79,3.18，3.56 M级 0.64,0.71,0.81,0.89,1.07,1.24,1.47,1.65,1.83,2.11,2.41,2.77,3.10