人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)是指用于人(ren)(ren)(ren)(ren)員進(jin)出設(she)備以(yi)便安(an)裝、檢修和(he)安(an)全檢查的開孔(kong)(kong)(kong)(kong)結構。主要由短筒(tong)節（或(huo)短管）、法蘭和(he)帶(dai)把(ba)手的人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)蓋(gai)組(zu)成。從安(an)全檢查考慮(lv)，壓(ya)力容器要求開設(she)的人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)數及(ji)其小(xiao)尺寸見“檢查孔(kong)(kong)(kong)(kong)”。人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)材料(liao)有碳鋼(gang)和(he)不銹鋼(gang)。按(an)(an)受(shou)(shou)壓(ya)情況人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)分為(wei)(wei)常壓(ya)和(he)受(shou)(shou)壓(ya)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)；按(an)(an)形(xing)狀(zhuang)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)分為(wei)(wei)圓形(xing)、橢(tuo)圓形(xing)和(he)矩(ju)形(xing)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)，矩(ju)形(xing)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)僅適(shi)用于常壓(ya)設(she)備；按(an)(an)安(an)裝位(wei)置人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)分為(wei)(wei)水(shui)平和(he)垂直安(an)裝人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)；人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)蓋(gai)固定方式(shi)(shi)有迥轉蓋(gai)和(he)吊蓋(gai)；人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)開后速度有普通(tong)式(shi)(shi)和(he)快開式(shi)(shi)，人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)結構和(he)尺寸一般都(dou)已(yi)標準(zhun)化，可參照有關(guan)手冊(ce)選用或(huo)設(she)計。