人(ren)(ren)孔(kong)(kong)是指用(yong)(yong)于(yu)人(ren)(ren)員進出設(she)(she)(she)備以(yi)便安裝(zhuang)、檢(jian)修和(he)(he)(he)安全檢(jian)查的開(kai)孔(kong)(kong)結構。主要(yao)由短(duan)筒節（或(huo)短(duan)管）、法(fa)蘭和(he)(he)(he)帶把(ba)手的人(ren)(ren)孔(kong)(kong)蓋組成。從安全檢(jian)查考(kao)慮，壓力容(rong)器要(yao)求開(kai)設(she)(she)(she)的人(ren)(ren)孔(kong)(kong)數及其(qi)小尺寸見“檢(jian)查孔(kong)(kong)”。人(ren)(ren)孔(kong)(kong)材料有(you)(you)碳鋼(gang)(gang)和(he)(he)(he)不銹鋼(gang)(gang)。按受(shou)壓情況(kuang)人(ren)(ren)孔(kong)(kong)分(fen)為(wei)(wei)常(chang)壓和(he)(he)(he)受(shou)壓人(ren)(ren)孔(kong)(kong)；按形(xing)狀人(ren)(ren)孔(kong)(kong)分(fen)為(wei)(wei)圓形(xing)、橢圓形(xing)和(he)(he)(he)矩形(xing)人(ren)(ren)孔(kong)(kong)，矩形(xing)人(ren)(ren)孔(kong)(kong)僅適用(yong)(yong)于(yu)常(chang)壓設(she)(she)(she)備；按安裝(zhuang)位置(zhi)人(ren)(ren)孔(kong)(kong)分(fen)為(wei)(wei)水平(ping)和(he)(he)(he)垂直安裝(zhuang)人(ren)(ren)孔(kong)(kong)；人(ren)(ren)孔(kong)(kong)蓋固(gu)定方式(shi)有(you)(you)迥轉蓋和(he)(he)(he)吊蓋；人(ren)(ren)孔(kong)(kong)開(kai)后速度有(you)(you)普通式(shi)和(he)(he)(he)快開(kai)式(shi)，人(ren)(ren)孔(kong)(kong)結構和(he)(he)(he)尺寸一般都已標準化(hua)，可參照有(you)(you)關手冊(ce)選(xuan)用(yong)(yong)或(huo)設(she)(she)(she)計。