為提高鋼管的耐腐蝕性能,對(duì)一般鋼管進(jìn)行鍍鋅,即為鍍鋅管.鍍鋅管分熱鍍鋅和電鍍鋅兩種,熱鍍鋅鍍鋅層厚,電鍍鋅成本低,表面不是很光滑.

      鍍鋅管參數(shù)

　　公稱壁厚mm 2.0, 2.5, 2.8, 3.2, 3.5, 3.8, 4.0, 4.5

　　系數(shù)c 1.064, 1.051, 1.045, 1.040, 1.036, 1.034, 1.032, 1.028

　　鋼的牌號(hào)：Q215A, Q215B, Q235A, Q235B

　　試驗(yàn)壓力值/Mpa：D10.2-168.3mm為3Mpa, D177.8-323.9mm為5Mpa