人(ren)(ren)(ren)(ren)(ren)孔(kong)是指用(yong)于人(ren)(ren)(ren)(ren)(ren)員進出設(she)備以便安(an)裝(zhuang)(zhuang)、檢(jian)修和(he)(he)(he)安(an)全檢(jian)查的開(kai)(kai)孔(kong)結構(gou)。主(zhu)要由(you)短(duan)(duan)筒(tong)節（或短(duan)(duan)管(guan)）、法蘭和(he)(he)(he)帶把(ba)手的人(ren)(ren)(ren)(ren)(ren)孔(kong)蓋(gai)(gai)組(zu)成。從安(an)全檢(jian)查考慮(lv)，壓(ya)(ya)力容(rong)器要求開(kai)(kai)設(she)的人(ren)(ren)(ren)(ren)(ren)孔(kong)數及(ji)其小(xiao)尺(chi)寸見“檢(jian)查孔(kong)”。人(ren)(ren)(ren)(ren)(ren)孔(kong)材(cai)料(liao)有(you)(you)碳鋼和(he)(he)(he)不銹鋼。按(an)(an)受壓(ya)(ya)情況人(ren)(ren)(ren)(ren)(ren)孔(kong)分為(wei)(wei)常壓(ya)(ya)和(he)(he)(he)受壓(ya)(ya)人(ren)(ren)(ren)(ren)(ren)孔(kong)；按(an)(an)形(xing)狀人(ren)(ren)(ren)(ren)(ren)孔(kong)分為(wei)(wei)圓(yuan)形(xing)、橢(tuo)圓(yuan)形(xing)和(he)(he)(he)矩形(xing)人(ren)(ren)(ren)(ren)(ren)孔(kong)，矩形(xing)人(ren)(ren)(ren)(ren)(ren)孔(kong)僅(jin)適用(yong)于常壓(ya)(ya)設(she)備；按(an)(an)安(an)裝(zhuang)(zhuang)位置人(ren)(ren)(ren)(ren)(ren)孔(kong)分為(wei)(wei)水平和(he)(he)(he)垂直安(an)裝(zhuang)(zhuang)人(ren)(ren)(ren)(ren)(ren)孔(kong)；人(ren)(ren)(ren)(ren)(ren)孔(kong)蓋(gai)(gai)固定方式(shi)(shi)有(you)(you)迥(jiong)轉蓋(gai)(gai)和(he)(he)(he)吊蓋(gai)(gai)；人(ren)(ren)(ren)(ren)(ren)孔(kong)開(kai)(kai)后速度(du)有(you)(you)普通式(shi)(shi)和(he)(he)(he)快開(kai)(kai)式(shi)(shi)，人(ren)(ren)(ren)(ren)(ren)孔(kong)結構(gou)和(he)(he)(he)尺(chi)寸一般都已標準化，可參照有(you)(you)關手冊選用(yong)或設(she)計(ji)。