人(ren)(ren)孔是指用(yong)于人(ren)(ren)員進(jin)出(chu)設(she)備(bei)以便(bian)安裝、檢修和(he)安全(quan)檢查的開(kai)孔結構。主要(yao)由短筒節(jie)（或(huo)短管(guan)）、法蘭和(he)帶把手的人(ren)(ren)孔蓋組成(cheng)。從(cong)安全(quan)檢查考(kao)慮，壓(ya)(ya)(ya)力(li)容器(qi)要(yao)求開(kai)設(she)的人(ren)(ren)孔數(shu)及其(qi)小尺寸(cun)見“檢查孔”。人(ren)(ren)孔材料有(you)(you)碳鋼(gang)和(he)不(bu)銹鋼(gang)。按(an)(an)受壓(ya)(ya)(ya)情況人(ren)(ren)孔分為(wei)常壓(ya)(ya)(ya)和(he)受壓(ya)(ya)(ya)人(ren)(ren)孔；按(an)(an)形(xing)狀人(ren)(ren)孔分為(wei)圓形(xing)、橢圓形(xing)和(he)矩形(xing)人(ren)(ren)孔，矩形(xing)人(ren)(ren)孔僅適(shi)用(yong)于常壓(ya)(ya)(ya)設(she)備(bei)；按(an)(an)安裝位置人(ren)(ren)孔分為(wei)水平和(he)垂直安裝人(ren)(ren)孔；人(ren)(ren)孔蓋固定方(fang)式(shi)有(you)(you)迥(jiong)轉蓋和(he)吊蓋；人(ren)(ren)孔開(kai)后速度有(you)(you)普通式(shi)和(he)快開(kai)式(shi)，人(ren)(ren)孔結構和(he)尺寸(cun)一般都(dou)已標準化，可參照有(you)(you)關(guan)手冊選用(yong)或(huo)設(she)計。