人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)是指用于人(ren)(ren)(ren)(ren)員進出設(she)備以(yi)便安(an)(an)裝、檢(jian)修和(he)(he)(he)安(an)(an)全檢(jian)查(cha)的(de)開(kai)孔(kong)(kong)(kong)結構。主(zhu)要由短筒節（或短管）、法蘭和(he)(he)(he)帶(dai)把手的(de)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)蓋(gai)組(zu)成。從安(an)(an)全檢(jian)查(cha)考慮(lv)，壓(ya)力容器要求開(kai)設(she)的(de)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)數及其小尺寸(cun)見“檢(jian)查(cha)孔(kong)(kong)(kong)”。人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)材料有碳鋼和(he)(he)(he)不(bu)銹鋼。按(an)受壓(ya)情況人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)分為常壓(ya)和(he)(he)(he)受壓(ya)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)；按(an)形狀人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)分為圓形、橢圓形和(he)(he)(he)矩(ju)(ju)形人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)，矩(ju)(ju)形人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)僅適用于常壓(ya)設(she)備；按(an)安(an)(an)裝位置人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)分為水平和(he)(he)(he)垂直安(an)(an)裝人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)；人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)蓋(gai)固定(ding)方式(shi)有迥轉蓋(gai)和(he)(he)(he)吊(diao)蓋(gai)；人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)開(kai)后速度有普通式(shi)和(he)(he)(he)快開(kai)式(shi)，人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)結構和(he)(he)(he)尺寸(cun)一般都已標準(zhun)化，可參照(zhao)有關手冊選用或設(she)計。