人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)是指(zhi)用(yong)于人(ren)(ren)(ren)(ren)(ren)員進(jin)出設(she)備(bei)以(yi)便安(an)裝(zhuang)、檢(jian)修(xiu)和(he)(he)(he)(he)安(an)全檢(jian)查的開(kai)孔(kong)(kong)結構(gou)。主要由(you)短筒節（或短管）、法蘭和(he)(he)(he)(he)帶(dai)把手的人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)蓋(gai)組成。從安(an)全檢(jian)查考慮，壓(ya)(ya)(ya)力容器要求開(kai)設(she)的人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)數(shu)及其小尺寸見(jian)“檢(jian)查孔(kong)(kong)”。人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)材料有(you)碳鋼(gang)和(he)(he)(he)(he)不銹鋼(gang)。按受壓(ya)(ya)(ya)情況(kuang)人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)分為常壓(ya)(ya)(ya)和(he)(he)(he)(he)受壓(ya)(ya)(ya)人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)；按形(xing)狀人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)分為圓(yuan)形(xing)、橢圓(yuan)形(xing)和(he)(he)(he)(he)矩形(xing)人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)，矩形(xing)人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)僅適用(yong)于常壓(ya)(ya)(ya)設(she)備(bei)；按安(an)裝(zhuang)位置人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)分為水平(ping)和(he)(he)(he)(he)垂直安(an)裝(zhuang)人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)；人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)蓋(gai)固(gu)定方式(shi)(shi)有(you)迥(jiong)轉蓋(gai)和(he)(he)(he)(he)吊蓋(gai)；人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)開(kai)后速度有(you)普通式(shi)(shi)和(he)(he)(he)(he)快開(kai)式(shi)(shi)，人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)結構(gou)和(he)(he)(he)(he)尺寸一般都已(yi)標準(zhun)化，可參照有(you)關手冊選用(yong)或設(she)計。