人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)是(shi)指用于(yu)人(ren)(ren)(ren)(ren)(ren)(ren)員(yuan)進出設(she)備(bei)(bei)以便安(an)裝(zhuang)(zhuang)、檢(jian)修和(he)(he)(he)安(an)全(quan)檢(jian)查(cha)的開孔(kong)結構(gou)。主要由短(duan)筒(tong)節(jie)（或(huo)短(duan)管）、法蘭和(he)(he)(he)帶把(ba)手(shou)的人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)蓋(gai)組成。從安(an)全(quan)檢(jian)查(cha)考慮(lv)，壓(ya)力容器要求開設(she)的人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)數及其小尺寸(cun)見“檢(jian)查(cha)孔(kong)”。人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)材料有(you)碳鋼和(he)(he)(he)不(bu)銹鋼。按受(shou)壓(ya)情況人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)分(fen)為常壓(ya)和(he)(he)(he)受(shou)壓(ya)人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)；按形(xing)(xing)狀(zhuang)人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)分(fen)為圓形(xing)(xing)、橢(tuo)圓形(xing)(xing)和(he)(he)(he)矩(ju)(ju)形(xing)(xing)人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)，矩(ju)(ju)形(xing)(xing)人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)僅(jin)適用于(yu)常壓(ya)設(she)備(bei)(bei)；按安(an)裝(zhuang)(zhuang)位(wei)置人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)分(fen)為水平(ping)和(he)(he)(he)垂直(zhi)安(an)裝(zhuang)(zhuang)人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)；人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)蓋(gai)固(gu)定(ding)方式(shi)有(you)迥(jiong)轉蓋(gai)和(he)(he)(he)吊(diao)蓋(gai)；人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)開后速度有(you)普(pu)通(tong)式(shi)和(he)(he)(he)快開式(shi)，人(ren)(ren)(ren)(ren)(ren)(ren)孔(kong)結構(gou)和(he)(he)(he)尺寸(cun)一般都已標準化，可參照(zhao)有(you)關手(shou)冊選用或(huo)設(she)計(ji)。