人(ren)(ren)(ren)孔(kong)(kong)(kong)是指用(yong)于人(ren)(ren)(ren)員(yuan)進出設(she)備(bei)以便安裝、檢(jian)(jian)(jian)修和安全(quan)檢(jian)(jian)(jian)查(cha)的(de)開(kai)孔(kong)(kong)(kong)結(jie)(jie)構(gou)。主要(yao)由短筒節（或(huo)短管(guan)）、法蘭和帶把手(shou)(shou)的(de)人(ren)(ren)(ren)孔(kong)(kong)(kong)蓋(gai)(gai)組(zu)成(cheng)。從安全(quan)檢(jian)(jian)(jian)查(cha)考慮，壓力容器要(yao)求開(kai)設(she)的(de)人(ren)(ren)(ren)孔(kong)(kong)(kong)數及其(qi)小尺寸見“檢(jian)(jian)(jian)查(cha)孔(kong)(kong)(kong)”。人(ren)(ren)(ren)孔(kong)(kong)(kong)材料有(you)碳(tan)鋼和不銹鋼。按受壓情(qing)況(kuang)人(ren)(ren)(ren)孔(kong)(kong)(kong)分為(wei)常壓和受壓人(ren)(ren)(ren)孔(kong)(kong)(kong)；按形(xing)狀人(ren)(ren)(ren)孔(kong)(kong)(kong)分為(wei)圓形(xing)、橢圓形(xing)和矩形(xing)人(ren)(ren)(ren)孔(kong)(kong)(kong)，矩形(xing)人(ren)(ren)(ren)孔(kong)(kong)(kong)僅(jin)適用(yong)于常壓設(she)備(bei)；按安裝位(wei)置人(ren)(ren)(ren)孔(kong)(kong)(kong)分為(wei)水平和垂直安裝人(ren)(ren)(ren)孔(kong)(kong)(kong)；人(ren)(ren)(ren)孔(kong)(kong)(kong)蓋(gai)(gai)固(gu)定方式有(you)迥轉蓋(gai)(gai)和吊蓋(gai)(gai)；人(ren)(ren)(ren)孔(kong)(kong)(kong)開(kai)后速度有(you)普通(tong)式和快開(kai)式，人(ren)(ren)(ren)孔(kong)(kong)(kong)結(jie)(jie)構(gou)和尺寸一(yi)般(ban)都已標準化，可參照有(you)關手(shou)(shou)冊選用(yong)或(huo)設(she)計。