人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)是指用于人(ren)(ren)(ren)員進出設備以便安(an)裝、檢(jian)修和(he)安(an)全(quan)檢(jian)查的開(kai)(kai)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)結構。主要(yao)由短(duan)筒節（或短(duan)管）、法蘭和(he)帶把手(shou)(shou)的人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)蓋(gai)組成。從安(an)全(quan)檢(jian)查考(kao)慮，壓(ya)力容器要(yao)求開(kai)(kai)設的人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)數及(ji)其小尺(chi)寸(cun)見(jian)“檢(jian)查孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)”。人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)材料有碳鋼和(he)不銹鋼。按受壓(ya)情況人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)分(fen)為常壓(ya)和(he)受壓(ya)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)；按形狀(zhuang)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)分(fen)為圓形、橢圓形和(he)矩形人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)，矩形人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)僅(jin)適用于常壓(ya)設備；按安(an)裝位(wei)置人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)分(fen)為水平和(he)垂直(zhi)安(an)裝人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)；人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)蓋(gai)固(gu)定方式(shi)有迥(jiong)轉(zhuan)蓋(gai)和(he)吊蓋(gai)；人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)開(kai)(kai)后速度有普通式(shi)和(he)快開(kai)(kai)式(shi)，人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)結構和(he)尺(chi)寸(cun)一般(ban)都已(yi)標(biao)準化，可(ke)參(can)照(zhao)有關手(shou)(shou)冊選(xuan)用或設計。