人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)是指(zhi)用(yong)于人(ren)(ren)(ren)(ren)(ren)(ren)員進出(chu)設(she)備(bei)以便安裝、檢(jian)修和(he)安全(quan)檢(jian)查(cha)的(de)開(kai)(kai)孔(kong)結(jie)構(gou)。主要(yao)由短筒節（或短管(guan)）、法蘭(lan)和(he)帶把手(shou)的(de)人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)蓋組(zu)成。從安全(quan)檢(jian)查(cha)考慮，壓(ya)(ya)力容器要(yao)求(qiu)開(kai)(kai)設(she)的(de)人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)數(shu)及其(qi)小尺寸見“檢(jian)查(cha)孔(kong)”。人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)材(cai)料有碳(tan)鋼和(he)不銹鋼。按(an)受壓(ya)(ya)情(qing)況人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)分(fen)為常壓(ya)(ya)和(he)受壓(ya)(ya)人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)；按(an)形(xing)狀人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)分(fen)為圓形(xing)、橢圓形(xing)和(he)矩形(xing)人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)，矩形(xing)人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)僅適用(yong)于常壓(ya)(ya)設(she)備(bei)；按(an)安裝位(wei)置人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)分(fen)為水平(ping)和(he)垂(chui)直安裝人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)；人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)蓋固定方式(shi)(shi)有迥轉蓋和(he)吊蓋；人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)開(kai)(kai)后速(su)度(du)有普(pu)通式(shi)(shi)和(he)快(kuai)開(kai)(kai)式(shi)(shi)，人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)結(jie)構(gou)和(he)尺寸一(yi)般都已標準(zhun)化，可(ke)參照(zhao)有關(guan)手(shou)冊(ce)選用(yong)或設(she)計。