人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)是指用于(yu)人(ren)(ren)(ren)(ren)員(yuan)進(jin)出設(she)備以便安(an)(an)(an)裝、檢(jian)(jian)(jian)修(xiu)和(he)安(an)(an)(an)全檢(jian)(jian)(jian)查(cha)的開(kai)孔(kong)(kong)(kong)結(jie)構(gou)。主要由(you)短(duan)筒節(jie)（或短(duan)管）、法(fa)蘭(lan)和(he)帶把(ba)手(shou)的人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)蓋組成。從(cong)安(an)(an)(an)全檢(jian)(jian)(jian)查(cha)考(kao)慮(lv)，壓(ya)力容(rong)器要求(qiu)開(kai)設(she)的人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)數及其小(xiao)尺寸(cun)見“檢(jian)(jian)(jian)查(cha)孔(kong)(kong)(kong)”。人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)材料有(you)碳鋼和(he)不銹鋼。按(an)受壓(ya)情況(kuang)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)分(fen)為常(chang)壓(ya)和(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(fen)為圓形、橢圓形和(he)矩形人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)，矩形人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)僅適用于(yu)常(chang)壓(ya)設(she)備；按(an)安(an)(an)(an)裝位置人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)分(fen)為水平和(he)垂直安(an)(an)(an)裝人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)；人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)蓋固定方式有(you)迥轉蓋和(he)吊蓋；人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)開(kai)后速度有(you)普通式和(he)快開(kai)式，人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)結(jie)構(gou)和(he)尺寸(cun)一般都已標準化，可(ke)參照有(you)關(guan)手(shou)冊選用或設(she)計。