人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)是(shi)指用(yong)于人(ren)(ren)(ren)(ren)員進出設(she)備以便安裝(zhuang)、檢(jian)修(xiu)和(he)(he)安全(quan)檢(jian)查的開(kai)(kai)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)結(jie)構。主要(yao)由(you)短筒節（或短管）、法(fa)蘭和(he)(he)帶把手(shou)的人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)蓋組成。從安全(quan)檢(jian)查考慮(lv)，壓力容(rong)器要(yao)求(qiu)開(kai)(kai)設(she)的人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)數及其小(xiao)尺(chi)寸(cun)見“檢(jian)查孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)”。人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)材(cai)料有(you)碳(tan)鋼(gang)和(he)(he)不銹鋼(gang)。按(an)受壓情況人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)分(fen)為常(chang)壓和(he)(he)受壓人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)；按(an)形(xing)狀(zhuang)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)分(fen)為圓形(xing)、橢圓形(xing)和(he)(he)矩形(xing)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)，矩形(xing)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)僅適用(yong)于常(chang)壓設(she)備；按(an)安裝(zhuang)位置人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)分(fen)為水平和(he)(he)垂直安裝(zhuang)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)；人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)蓋固定(ding)方(fang)式(shi)有(you)迥(jiong)轉(zhuan)蓋和(he)(he)吊蓋；人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)開(kai)(kai)后速度有(you)普通式(shi)和(he)(he)快(kuai)開(kai)(kai)式(shi)，人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)結(jie)構和(he)(he)尺(chi)寸(cun)一般都已標準化，可參照有(you)關手(shou)冊選用(yong)或設(she)計。