人(ren)孔(kong)(kong)(kong)是指用于人(ren)員進(jin)出設(she)(she)備以便安(an)(an)裝(zhuang)(zhuang)、檢修和(he)安(an)(an)全檢查(cha)的(de)開孔(kong)(kong)(kong)結構(gou)。主要由短(duan)筒節(jie)（或短(duan)管）、法蘭和(he)帶(dai)把手的(de)人(ren)孔(kong)(kong)(kong)蓋(gai)組成。從安(an)(an)全檢查(cha)考慮，壓(ya)(ya)力容器要求開設(she)(she)的(de)人(ren)孔(kong)(kong)(kong)數及其小尺(chi)寸見(jian)“檢查(cha)孔(kong)(kong)(kong)”。人(ren)孔(kong)(kong)(kong)材料有碳鋼和(he)不銹鋼。按(an)受壓(ya)(ya)情(qing)況人(ren)孔(kong)(kong)(kong)分為常壓(ya)(ya)和(he)受壓(ya)(ya)人(ren)孔(kong)(kong)(kong)；按(an)形(xing)狀人(ren)孔(kong)(kong)(kong)分為圓(yuan)形(xing)、橢圓(yuan)形(xing)和(he)矩(ju)形(xing)人(ren)孔(kong)(kong)(kong)，矩(ju)形(xing)人(ren)孔(kong)(kong)(kong)僅適用于常壓(ya)(ya)設(she)(she)備；按(an)安(an)(an)裝(zhuang)(zhuang)位置人(ren)孔(kong)(kong)(kong)分為水(shui)平和(he)垂直安(an)(an)裝(zhuang)(zhuang)人(ren)孔(kong)(kong)(kong)；人(ren)孔(kong)(kong)(kong)蓋(gai)固定方式(shi)有迥轉(zhuan)蓋(gai)和(he)吊蓋(gai)；人(ren)孔(kong)(kong)(kong)開后速(su)度(du)有普通(tong)式(shi)和(he)快開式(shi)，人(ren)孔(kong)(kong)(kong)結構(gou)和(he)尺(chi)寸一般(ban)都已標準化，可參照有關手冊選用或設(she)(she)計。