人(ren)(ren)孔(kong)(kong)(kong)(kong)是(shi)指用(yong)(yong)于人(ren)(ren)員進出(chu)設(she)(she)(she)備以便安(an)裝(zhuang)、檢修和(he)安(an)全檢查的(de)開(kai)(kai)孔(kong)(kong)(kong)(kong)結(jie)構。主要由短筒節（或短管）、法(fa)蘭和(he)帶把手的(de)人(ren)(ren)孔(kong)(kong)(kong)(kong)蓋(gai)組成。從安(an)全檢查考慮，壓(ya)力容器要求開(kai)(kai)設(she)(she)(she)的(de)人(ren)(ren)孔(kong)(kong)(kong)(kong)數(shu)及其小尺寸見“檢查孔(kong)(kong)(kong)(kong)”。人(ren)(ren)孔(kong)(kong)(kong)(kong)材料(liao)有(you)碳鋼(gang)和(he)不銹鋼(gang)。按受(shou)壓(ya)情況人(ren)(ren)孔(kong)(kong)(kong)(kong)分為(wei)常(chang)壓(ya)和(he)受(shou)壓(ya)人(ren)(ren)孔(kong)(kong)(kong)(kong)；按形(xing)狀人(ren)(ren)孔(kong)(kong)(kong)(kong)分為(wei)圓(yuan)形(xing)、橢圓(yuan)形(xing)和(he)矩形(xing)人(ren)(ren)孔(kong)(kong)(kong)(kong)，矩形(xing)人(ren)(ren)孔(kong)(kong)(kong)(kong)僅適用(yong)(yong)于常(chang)壓(ya)設(she)(she)(she)備；按安(an)裝(zhuang)位置(zhi)人(ren)(ren)孔(kong)(kong)(kong)(kong)分為(wei)水平(ping)和(he)垂直安(an)裝(zhuang)人(ren)(ren)孔(kong)(kong)(kong)(kong)；人(ren)(ren)孔(kong)(kong)(kong)(kong)蓋(gai)固定方式有(you)迥轉蓋(gai)和(he)吊(diao)蓋(gai)；人(ren)(ren)孔(kong)(kong)(kong)(kong)開(kai)(kai)后速度有(you)普通式和(he)快開(kai)(kai)式，人(ren)(ren)孔(kong)(kong)(kong)(kong)結(jie)構和(he)尺寸一般都已標(biao)準化，可參(can)照有(you)關手冊(ce)選(xuan)用(yong)(yong)或設(she)(she)(she)計。