人(ren)孔(kong)(kong)是指用于人(ren)員進出(chu)設備以便(bian)安裝(zhuang)、檢(jian)修和(he)(he)安全(quan)檢(jian)查的(de)(de)開孔(kong)(kong)結構。主要(yao)由短筒節（或短管）、法蘭和(he)(he)帶把(ba)手的(de)(de)人(ren)孔(kong)(kong)蓋(gai)組(zu)成。從(cong)安全(quan)檢(jian)查考(kao)慮，壓力(li)容(rong)器要(yao)求開設的(de)(de)人(ren)孔(kong)(kong)數(shu)及其小尺(chi)寸(cun)(cun)見“檢(jian)查孔(kong)(kong)”。人(ren)孔(kong)(kong)材(cai)料有碳(tan)鋼和(he)(he)不銹(xiu)鋼。按受(shou)壓情況人(ren)孔(kong)(kong)分(fen)為(wei)常壓和(he)(he)受(shou)壓人(ren)孔(kong)(kong)；按形(xing)(xing)狀人(ren)孔(kong)(kong)分(fen)為(wei)圓形(xing)(xing)、橢圓形(xing)(xing)和(he)(he)矩形(xing)(xing)人(ren)孔(kong)(kong)，矩形(xing)(xing)人(ren)孔(kong)(kong)僅適(shi)用于常壓設備；按安裝(zhuang)位置人(ren)孔(kong)(kong)分(fen)為(wei)水平和(he)(he)垂直(zhi)安裝(zhuang)人(ren)孔(kong)(kong)；人(ren)孔(kong)(kong)蓋(gai)固定方(fang)式有迥(jiong)轉(zhuan)蓋(gai)和(he)(he)吊蓋(gai)；人(ren)孔(kong)(kong)開后速度有普通式和(he)(he)快(kuai)開式，人(ren)孔(kong)(kong)結構和(he)(he)尺(chi)寸(cun)(cun)一般都(dou)已標準化，可參照有關手冊選用或設計(ji)。