人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)是指用(yong)于(yu)人(ren)(ren)(ren)(ren)員進出設(she)(she)備以便安(an)裝(zhuang)、檢(jian)(jian)修(xiu)和(he)(he)安(an)全檢(jian)(jian)查的(de)(de)開(kai)孔(kong)(kong)(kong)(kong)(kong)(kong)結構(gou)。主要由(you)短筒(tong)節（或短管）、法蘭和(he)(he)帶把手的(de)(de)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)蓋(gai)(gai)組成。從安(an)全檢(jian)(jian)查考慮，壓(ya)力容器(qi)要求開(kai)設(she)(she)的(de)(de)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)數及(ji)其小尺(chi)寸見“檢(jian)(jian)查孔(kong)(kong)(kong)(kong)(kong)(kong)”。人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)材料有碳鋼和(he)(he)不(bu)銹(xiu)鋼。按(an)受(shou)壓(ya)情(qing)況人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)分為(wei)(wei)常壓(ya)和(he)(he)受(shou)壓(ya)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)；按(an)形(xing)(xing)(xing)狀人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)分為(wei)(wei)圓形(xing)(xing)(xing)、橢圓形(xing)(xing)(xing)和(he)(he)矩形(xing)(xing)(xing)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)，矩形(xing)(xing)(xing)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)僅適(shi)用(yong)于(yu)常壓(ya)設(she)(she)備；按(an)安(an)裝(zhuang)位置人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)分為(wei)(wei)水平和(he)(he)垂直安(an)裝(zhuang)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)；人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)蓋(gai)(gai)固定方式有迥轉(zhuan)蓋(gai)(gai)和(he)(he)吊蓋(gai)(gai)；人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)開(kai)后(hou)速度有普通式和(he)(he)快(kuai)開(kai)式，人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)結構(gou)和(he)(he)尺(chi)寸一般都已標準化(hua)，可(ke)參(can)照有關手冊(ce)選用(yong)或設(she)(she)計。