人(ren)(ren)(ren)孔(kong)(kong)(kong)是指用于(yu)人(ren)(ren)(ren)員(yuan)進出設(she)備以便安(an)裝、檢修和(he)安(an)全檢查(cha)的開(kai)(kai)(kai)孔(kong)(kong)(kong)結構(gou)。主要(yao)由短(duan)筒節（或短(duan)管）、法蘭和(he)帶把手的人(ren)(ren)(ren)孔(kong)(kong)(kong)蓋組成。從(cong)安(an)全檢查(cha)考慮，壓(ya)(ya)力(li)容器要(yao)求開(kai)(kai)(kai)設(she)的人(ren)(ren)(ren)孔(kong)(kong)(kong)數及其(qi)小尺寸(cun)見“檢查(cha)孔(kong)(kong)(kong)”。人(ren)(ren)(ren)孔(kong)(kong)(kong)材料有(you)(you)碳鋼(gang)和(he)不銹鋼(gang)。按受壓(ya)(ya)情況人(ren)(ren)(ren)孔(kong)(kong)(kong)分為常(chang)壓(ya)(ya)和(he)受壓(ya)(ya)人(ren)(ren)(ren)孔(kong)(kong)(kong)；按形(xing)(xing)狀人(ren)(ren)(ren)孔(kong)(kong)(kong)分為圓(yuan)形(xing)(xing)、橢圓(yuan)形(xing)(xing)和(he)矩形(xing)(xing)人(ren)(ren)(ren)孔(kong)(kong)(kong)，矩形(xing)(xing)人(ren)(ren)(ren)孔(kong)(kong)(kong)僅適用于(yu)常(chang)壓(ya)(ya)設(she)備；按安(an)裝位置人(ren)(ren)(ren)孔(kong)(kong)(kong)分為水平和(he)垂(chui)直安(an)裝人(ren)(ren)(ren)孔(kong)(kong)(kong)；人(ren)(ren)(ren)孔(kong)(kong)(kong)蓋固定(ding)方(fang)式有(you)(you)迥(jiong)轉蓋和(he)吊蓋；人(ren)(ren)(ren)孔(kong)(kong)(kong)開(kai)(kai)(kai)后(hou)速度有(you)(you)普通式和(he)快開(kai)(kai)(kai)式，人(ren)(ren)(ren)孔(kong)(kong)(kong)結構(gou)和(he)尺寸(cun)一(yi)般都已標準化，可參照(zhao)有(you)(you)關手冊選用或設(she)計。