人(ren)(ren)(ren)孔(kong)(kong)(kong)是(shi)指用于(yu)人(ren)(ren)(ren)員(yuan)進出設(she)(she)備(bei)以(yi)便安裝(zhuang)(zhuang)、檢修和(he)(he)安全檢查(cha)(cha)的開孔(kong)(kong)(kong)結(jie)構。主要由(you)短筒節（或短管）、法蘭和(he)(he)帶把手的人(ren)(ren)(ren)孔(kong)(kong)(kong)蓋(gai)(gai)組成。從安全檢查(cha)(cha)考慮，壓力容(rong)器要求開設(she)(she)的人(ren)(ren)(ren)孔(kong)(kong)(kong)數及其小尺寸見(jian)“檢查(cha)(cha)孔(kong)(kong)(kong)”。人(ren)(ren)(ren)孔(kong)(kong)(kong)材料有(you)(you)碳鋼(gang)和(he)(he)不銹鋼(gang)。按(an)受壓情況(kuang)人(ren)(ren)(ren)孔(kong)(kong)(kong)分為(wei)常壓和(he)(he)受壓人(ren)(ren)(ren)孔(kong)(kong)(kong)；按(an)形(xing)狀人(ren)(ren)(ren)孔(kong)(kong)(kong)分為(wei)圓形(xing)、橢圓形(xing)和(he)(he)矩(ju)形(xing)人(ren)(ren)(ren)孔(kong)(kong)(kong)，矩(ju)形(xing)人(ren)(ren)(ren)孔(kong)(kong)(kong)僅適(shi)用于(yu)常壓設(she)(she)備(bei)；按(an)安裝(zhuang)(zhuang)位置人(ren)(ren)(ren)孔(kong)(kong)(kong)分為(wei)水平和(he)(he)垂直安裝(zhuang)(zhuang)人(ren)(ren)(ren)孔(kong)(kong)(kong)；人(ren)(ren)(ren)孔(kong)(kong)(kong)蓋(gai)(gai)固定方式(shi)有(you)(you)迥轉蓋(gai)(gai)和(he)(he)吊蓋(gai)(gai)；人(ren)(ren)(ren)孔(kong)(kong)(kong)開后(hou)速度有(you)(you)普(pu)通(tong)式(shi)和(he)(he)快(kuai)開式(shi)，人(ren)(ren)(ren)孔(kong)(kong)(kong)結(jie)構和(he)(he)尺寸一般都已標準化(hua)，可參照有(you)(you)關手冊選用或設(she)(she)計。