人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)是指用于人(ren)(ren)(ren)員進出設備以便安(an)裝(zhuang)、檢(jian)(jian)修和安(an)全檢(jian)(jian)查(cha)的(de)開(kai)孔(kong)(kong)(kong)(kong)結構(gou)。主要由短(duan)筒節（或短(duan)管）、法蘭和帶把(ba)手的(de)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)蓋(gai)組成(cheng)。從安(an)全檢(jian)(jian)查(cha)考慮，壓(ya)力容器要求開(kai)設的(de)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)數及(ji)其小尺寸見“檢(jian)(jian)查(cha)孔(kong)(kong)(kong)(kong)”。人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)材(cai)料有(you)(you)碳鋼和不銹鋼。按(an)(an)受壓(ya)情況人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)分為(wei)常(chang)壓(ya)和受壓(ya)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)；按(an)(an)形(xing)(xing)狀人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)分為(wei)圓(yuan)形(xing)(xing)、橢圓(yuan)形(xing)(xing)和矩形(xing)(xing)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)，矩形(xing)(xing)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)僅(jin)適用于常(chang)壓(ya)設備；按(an)(an)安(an)裝(zhuang)位置人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)分為(wei)水平和垂直安(an)裝(zhuang)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)；人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)蓋(gai)固定方式(shi)有(you)(you)迥(jiong)轉(zhuan)蓋(gai)和吊蓋(gai)；人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)開(kai)后(hou)速度有(you)(you)普通式(shi)和快開(kai)式(shi)，人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)結構(gou)和尺寸一般(ban)都(dou)已標準化(hua)，可參(can)照(zhao)有(you)(you)關手冊選(xuan)用或設計。