人(ren)(ren)(ren)孔(kong)(kong)(kong)是指用(yong)(yong)于人(ren)(ren)(ren)員進出設備以便安裝、檢(jian)(jian)修和(he)(he)安全檢(jian)(jian)查的(de)(de)開(kai)孔(kong)(kong)(kong)結(jie)構。主要由短筒節(jie)（或短管）、法(fa)蘭(lan)和(he)(he)帶(dai)把手的(de)(de)人(ren)(ren)(ren)孔(kong)(kong)(kong)蓋組成。從安全檢(jian)(jian)查考慮，壓(ya)力容(rong)器要求開(kai)設的(de)(de)人(ren)(ren)(ren)孔(kong)(kong)(kong)數及其小(xiao)尺寸見“檢(jian)(jian)查孔(kong)(kong)(kong)”。人(ren)(ren)(ren)孔(kong)(kong)(kong)材料有(you)碳鋼和(he)(he)不銹鋼。按受壓(ya)情況(kuang)人(ren)(ren)(ren)孔(kong)(kong)(kong)分為常壓(ya)和(he)(he)受壓(ya)人(ren)(ren)(ren)孔(kong)(kong)(kong)；按形(xing)狀人(ren)(ren)(ren)孔(kong)(kong)(kong)分為圓形(xing)、橢(tuo)圓形(xing)和(he)(he)矩形(xing)人(ren)(ren)(ren)孔(kong)(kong)(kong)，矩形(xing)人(ren)(ren)(ren)孔(kong)(kong)(kong)僅適用(yong)(yong)于常壓(ya)設備；按安裝位置人(ren)(ren)(ren)孔(kong)(kong)(kong)分為水平和(he)(he)垂直安裝人(ren)(ren)(ren)孔(kong)(kong)(kong)；人(ren)(ren)(ren)孔(kong)(kong)(kong)蓋固定方(fang)式(shi)有(you)迥轉蓋和(he)(he)吊蓋；人(ren)(ren)(ren)孔(kong)(kong)(kong)開(kai)后(hou)速度(du)有(you)普通(tong)式(shi)和(he)(he)快開(kai)式(shi)，人(ren)(ren)(ren)孔(kong)(kong)(kong)結(jie)構和(he)(he)尺寸一(yi)般都已標準化，可參照有(you)關手冊選用(yong)(yong)或設計。