人(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)是指(zhi)用于(yu)人(ren)(ren)員(yuan)進出設(she)(she)備(bei)以便安裝(zhuang)、檢(jian)修和(he)(he)安全(quan)檢(jian)查(cha)的(de)開孔(kong)(kong)(kong)(kong)(kong)(kong)結構。主要由(you)短筒節（或短管(guan)）、法蘭和(he)(he)帶把(ba)手(shou)的(de)人(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)蓋(gai)組成(cheng)。從安全(quan)檢(jian)查(cha)考慮(lv)，壓(ya)力容器要求開設(she)(she)的(de)人(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)數(shu)及(ji)其小尺寸見“檢(jian)查(cha)孔(kong)(kong)(kong)(kong)(kong)(kong)”。人(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)材(cai)料有(you)(you)碳鋼和(he)(he)不銹鋼。按(an)(an)受(shou)壓(ya)情況人(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)分為常壓(ya)和(he)(he)受(shou)壓(ya)人(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)；按(an)(an)形(xing)狀人(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)分為圓形(xing)、橢圓形(xing)和(he)(he)矩形(xing)人(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)，矩形(xing)人(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)僅適用于(yu)常壓(ya)設(she)(she)備(bei)；按(an)(an)安裝(zhuang)位置人(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)分為水(shui)平和(he)(he)垂直安裝(zhuang)人(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)；人(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)蓋(gai)固定方(fang)式(shi)有(you)(you)迥轉蓋(gai)和(he)(he)吊蓋(gai)；人(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)開后速度有(you)(you)普(pu)通(tong)式(shi)和(he)(he)快開式(shi)，人(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)結構和(he)(he)尺寸一般(ban)都(dou)已標準化，可參(can)照(zhao)有(you)(you)關手(shou)冊選用或設(she)(she)計。