人(ren)(ren)孔(kong)(kong)(kong)(kong)是指用于(yu)人(ren)(ren)員進出設(she)備(bei)以(yi)便安(an)裝、檢修和(he)(he)安(an)全(quan)檢查(cha)(cha)的開(kai)孔(kong)(kong)(kong)(kong)結構。主(zhu)要由短(duan)筒(tong)節（或短(duan)管）、法蘭和(he)(he)帶把手的人(ren)(ren)孔(kong)(kong)(kong)(kong)蓋組成。從安(an)全(quan)檢查(cha)(cha)考慮，壓(ya)(ya)力容器要求開(kai)設(she)的人(ren)(ren)孔(kong)(kong)(kong)(kong)數(shu)及其小尺寸見“檢查(cha)(cha)孔(kong)(kong)(kong)(kong)”。人(ren)(ren)孔(kong)(kong)(kong)(kong)材料(liao)有碳鋼(gang)和(he)(he)不銹鋼(gang)。按受(shou)壓(ya)(ya)情(qing)況(kuang)人(ren)(ren)孔(kong)(kong)(kong)(kong)分為(wei)常(chang)壓(ya)(ya)和(he)(he)受(shou)壓(ya)(ya)人(ren)(ren)孔(kong)(kong)(kong)(kong)；按形(xing)狀人(ren)(ren)孔(kong)(kong)(kong)(kong)分為(wei)圓形(xing)、橢圓形(xing)和(he)(he)矩(ju)形(xing)人(ren)(ren)孔(kong)(kong)(kong)(kong)，矩(ju)形(xing)人(ren)(ren)孔(kong)(kong)(kong)(kong)僅(jin)適用于(yu)常(chang)壓(ya)(ya)設(she)備(bei)；按安(an)裝位置(zhi)人(ren)(ren)孔(kong)(kong)(kong)(kong)分為(wei)水平和(he)(he)垂直安(an)裝人(ren)(ren)孔(kong)(kong)(kong)(kong)；人(ren)(ren)孔(kong)(kong)(kong)(kong)蓋固定(ding)方式有迥轉蓋和(he)(he)吊蓋；人(ren)(ren)孔(kong)(kong)(kong)(kong)開(kai)后(hou)速度有普通式和(he)(he)快開(kai)式，人(ren)(ren)孔(kong)(kong)(kong)(kong)結構和(he)(he)尺寸一般都(dou)已標準(zhun)化，可參照有關手冊選用或設(she)計。