人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)是(shi)指用于人(ren)(ren)(ren)員進出(chu)設(she)(she)備(bei)以便安(an)裝、檢修和(he)(he)(he)安(an)全檢查的開(kai)孔(kong)(kong)(kong)(kong)(kong)結(jie)構。主要由短筒(tong)節（或短管）、法蘭和(he)(he)(he)帶把手的人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)蓋組成(cheng)。從安(an)全檢查考慮，壓(ya)力容(rong)器要求(qiu)開(kai)設(she)(she)的人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)數及(ji)其小(xiao)尺(chi)寸見(jian)“檢查孔(kong)(kong)(kong)(kong)(kong)”。人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)材料(liao)有(you)碳(tan)鋼(gang)和(he)(he)(he)不銹(xiu)鋼(gang)。按受(shou)(shou)壓(ya)情(qing)況人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)分為常壓(ya)和(he)(he)(he)受(shou)(shou)壓(ya)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)；按形(xing)狀(zhuang)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)分為圓形(xing)、橢圓形(xing)和(he)(he)(he)矩形(xing)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)，矩形(xing)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)僅適用于常壓(ya)設(she)(she)備(bei)；按安(an)裝位置人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)分為水(shui)平和(he)(he)(he)垂直安(an)裝人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)；人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)蓋固定方式有(you)迥轉蓋和(he)(he)(he)吊蓋；人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)開(kai)后速度有(you)普通式和(he)(he)(he)快(kuai)開(kai)式，人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)結(jie)構和(he)(he)(he)尺(chi)寸一(yi)般(ban)都(dou)已標(biao)準(zhun)化，可參照(zhao)有(you)關手冊選用或設(she)(she)計(ji)。