管件(jian)與管子的連接方式(shi)采用(yong)螺紋連接，而工(gong)藝采用(yong)模鍛(duan)(duan)成型和切削加工(gong)或利用(yong)型材直接加工(gong)等方法(fa)制(zhi)造的管件(jian)稱為(wei)(wei)鍛(duan)(duan)鋼制(zhi)螺紋管件(jian)。這(zhe)種(zhong)管件(jian)的規格較(jiao)小，通(tong)常公(gong)稱通(tong)徑范圍為(wei)(wei)DN8～DN100。
管(guan)件(jian)的種類及代(dai)號見表(biao)11-1
