人孔(kong)(kong)(kong)(kong)是指(zhi)用于人員進出設(she)備以(yi)便安(an)裝(zhuang)、檢(jian)修和(he)(he)安(an)全檢(jian)查(cha)(cha)的(de)(de)開(kai)孔(kong)(kong)(kong)(kong)結(jie)構。主要由短(duan)筒節（或(huo)短(duan)管）、法蘭和(he)(he)帶把手的(de)(de)人孔(kong)(kong)(kong)(kong)蓋(gai)(gai)組(zu)成。從(cong)安(an)全檢(jian)查(cha)(cha)考慮，壓(ya)力容器要求開(kai)設(she)的(de)(de)人孔(kong)(kong)(kong)(kong)數及其小尺寸見“檢(jian)查(cha)(cha)孔(kong)(kong)(kong)(kong)”。人孔(kong)(kong)(kong)(kong)材(cai)料有(you)碳鋼和(he)(he)不銹鋼。按受壓(ya)情況(kuang)人孔(kong)(kong)(kong)(kong)分為常(chang)壓(ya)和(he)(he)受壓(ya)人孔(kong)(kong)(kong)(kong)；按形(xing)(xing)狀人孔(kong)(kong)(kong)(kong)分為圓形(xing)(xing)、橢圓形(xing)(xing)和(he)(he)矩(ju)形(xing)(xing)人孔(kong)(kong)(kong)(kong)，矩(ju)形(xing)(xing)人孔(kong)(kong)(kong)(kong)僅適用于常(chang)壓(ya)設(she)備；按安(an)裝(zhuang)位置人孔(kong)(kong)(kong)(kong)分為水平和(he)(he)垂(chui)直安(an)裝(zhuang)人孔(kong)(kong)(kong)(kong)；人孔(kong)(kong)(kong)(kong)蓋(gai)(gai)固定方式有(you)迥(jiong)轉蓋(gai)(gai)和(he)(he)吊(diao)蓋(gai)(gai)；人孔(kong)(kong)(kong)(kong)開(kai)后(hou)速(su)度有(you)普通式和(he)(he)快開(kai)式，人孔(kong)(kong)(kong)(kong)結(jie)構和(he)(he)尺寸一般(ban)都(dou)已標(biao)準化，可參(can)照(zhao)有(you)關手冊選用或(huo)設(she)計(ji)。