人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)是(shi)指用(yong)于人(ren)(ren)(ren)(ren)員(yuan)進出(chu)設(she)備以便安(an)裝(zhuang)(zhuang)、檢修和安(an)全檢查的開(kai)孔(kong)(kong)(kong)結構。主要由短筒節（或短管）、法蘭和帶(dai)把手的人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)蓋組成。從安(an)全檢查考慮，壓(ya)力容器要求(qiu)開(kai)設(she)的人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)數及其(qi)小(xiao)尺寸見“檢查孔(kong)(kong)(kong)”。人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)材料有(you)碳鋼和不(bu)銹鋼。按(an)受(shou)壓(ya)情況人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)分為常壓(ya)和受(shou)壓(ya)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)；按(an)形(xing)狀人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)分為圓(yuan)形(xing)、橢圓(yuan)形(xing)和矩形(xing)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)，矩形(xing)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)僅適用(yong)于常壓(ya)設(she)備；按(an)安(an)裝(zhuang)(zhuang)位置人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)分為水平和垂直(zhi)安(an)裝(zhuang)(zhuang)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)；人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)蓋固定方(fang)式有(you)迥轉蓋和吊蓋；人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)開(kai)后速度有(you)普通式和快開(kai)式，人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)結構和尺寸一般都已標(biao)準(zhun)化，可參(can)照(zhao)有(you)關手冊選用(yong)或設(she)計。