管(guan)件(jian)(jian)與管(guan)子的(de)連接方(fang)式采(cai)用螺紋連接，而(er)工(gong)(gong)藝采(cai)用模(mo)鍛(duan)成型和切削(xue)加(jia)工(gong)(gong)或利(li)用型材直接加(jia)工(gong)(gong)等(deng)方(fang)法制造的(de)管(guan)件(jian)(jian)稱為鍛(duan)鋼制螺紋管(guan)件(jian)(jian)。這(zhe)種管(guan)件(jian)(jian)的(de)規(gui)格較(jiao)小，通常公稱通徑范圍為DN8～DN100。
管(guan)件(jian)的種類及代(dai)號見表11-1
