人(ren)(ren)(ren)孔(kong)(kong)(kong)是指(zhi)用(yong)于人(ren)(ren)(ren)員進出設備以便安裝、檢修和(he)(he)(he)安全(quan)檢查的(de)開(kai)孔(kong)(kong)(kong)結構。主要(yao)由短筒節（或短管）、法蘭和(he)(he)(he)帶(dai)把手的(de)人(ren)(ren)(ren)孔(kong)(kong)(kong)蓋組成。從安全(quan)檢查考慮，壓力容器(qi)要(yao)求開(kai)設的(de)人(ren)(ren)(ren)孔(kong)(kong)(kong)數及其小尺寸(cun)見(jian)“檢查孔(kong)(kong)(kong)”。人(ren)(ren)(ren)孔(kong)(kong)(kong)材料有碳鋼(gang)和(he)(he)(he)不銹鋼(gang)。按受壓情況(kuang)人(ren)(ren)(ren)孔(kong)(kong)(kong)分(fen)為(wei)常(chang)壓和(he)(he)(he)受壓人(ren)(ren)(ren)孔(kong)(kong)(kong)；按形狀(zhuang)人(ren)(ren)(ren)孔(kong)(kong)(kong)分(fen)為(wei)圓形、橢圓形和(he)(he)(he)矩形人(ren)(ren)(ren)孔(kong)(kong)(kong)，矩形人(ren)(ren)(ren)孔(kong)(kong)(kong)僅適用(yong)于常(chang)壓設備；按安裝位置人(ren)(ren)(ren)孔(kong)(kong)(kong)分(fen)為(wei)水平和(he)(he)(he)垂直安裝人(ren)(ren)(ren)孔(kong)(kong)(kong)；人(ren)(ren)(ren)孔(kong)(kong)(kong)蓋固定方式(shi)有迥轉蓋和(he)(he)(he)吊蓋；人(ren)(ren)(ren)孔(kong)(kong)(kong)開(kai)后(hou)速度有普通(tong)式(shi)和(he)(he)(he)快(kuai)開(kai)式(shi)，人(ren)(ren)(ren)孔(kong)(kong)(kong)結構和(he)(he)(he)尺寸(cun)一般都已標(biao)準化，可(ke)參照有關(guan)手冊選(xuan)用(yong)或設計。