人(ren)(ren)孔(kong)是指用(yong)于(yu)人(ren)(ren)員進(jin)出設備以便安(an)(an)(an)裝(zhuang)(zhuang)、檢修和(he)安(an)(an)(an)全檢查(cha)的(de)開孔(kong)結(jie)構(gou)。主要(yao)由短(duan)(duan)筒節（或短(duan)(duan)管(guan)）、法蘭和(he)帶把手(shou)的(de)人(ren)(ren)孔(kong)蓋(gai)組成。從安(an)(an)(an)全檢查(cha)考(kao)慮，壓力(li)容(rong)器(qi)要(yao)求開設的(de)人(ren)(ren)孔(kong)數及其(qi)小(xiao)尺(chi)寸見“檢查(cha)孔(kong)”。人(ren)(ren)孔(kong)材料有(you)(you)碳鋼和(he)不銹鋼。按受壓情況人(ren)(ren)孔(kong)分(fen)為常(chang)壓和(he)受壓人(ren)(ren)孔(kong)；按形狀人(ren)(ren)孔(kong)分(fen)為圓形、橢(tuo)圓形和(he)矩(ju)形人(ren)(ren)孔(kong)，矩(ju)形人(ren)(ren)孔(kong)僅適用(yong)于(yu)常(chang)壓設備；按安(an)(an)(an)裝(zhuang)(zhuang)位置人(ren)(ren)孔(kong)分(fen)為水平和(he)垂(chui)直安(an)(an)(an)裝(zhuang)(zhuang)人(ren)(ren)孔(kong)；人(ren)(ren)孔(kong)蓋(gai)固定方(fang)式(shi)有(you)(you)迥轉蓋(gai)和(he)吊蓋(gai)；人(ren)(ren)孔(kong)開后速度(du)有(you)(you)普通式(shi)和(he)快開式(shi)，人(ren)(ren)孔(kong)結(jie)構(gou)和(he)尺(chi)寸一般(ban)都已標準化，可參照有(you)(you)關手(shou)冊選用(yong)或設計。