人(ren)(ren)孔(kong)(kong)(kong)(kong)是(shi)指(zhi)用于(yu)人(ren)(ren)員進出設(she)備以便(bian)安裝、檢修(xiu)和(he)(he)安全檢查的開孔(kong)(kong)(kong)(kong)結構。主(zhu)要由短(duan)筒節（或(huo)短(duan)管）、法蘭和(he)(he)帶把手的人(ren)(ren)孔(kong)(kong)(kong)(kong)蓋組成。從安全檢查考慮，壓力容(rong)器要求開設(she)的人(ren)(ren)孔(kong)(kong)(kong)(kong)數(shu)及其(qi)小(xiao)尺(chi)寸見“檢查孔(kong)(kong)(kong)(kong)”。人(ren)(ren)孔(kong)(kong)(kong)(kong)材料有碳鋼和(he)(he)不銹(xiu)鋼。按(an)受壓情況人(ren)(ren)孔(kong)(kong)(kong)(kong)分為常壓和(he)(he)受壓人(ren)(ren)孔(kong)(kong)(kong)(kong)；按(an)形(xing)(xing)狀人(ren)(ren)孔(kong)(kong)(kong)(kong)分為圓形(xing)(xing)、橢圓形(xing)(xing)和(he)(he)矩(ju)形(xing)(xing)人(ren)(ren)孔(kong)(kong)(kong)(kong)，矩(ju)形(xing)(xing)人(ren)(ren)孔(kong)(kong)(kong)(kong)僅適用于(yu)常壓設(she)備；按(an)安裝位置人(ren)(ren)孔(kong)(kong)(kong)(kong)分為水平和(he)(he)垂直安裝人(ren)(ren)孔(kong)(kong)(kong)(kong)；人(ren)(ren)孔(kong)(kong)(kong)(kong)蓋固定方式(shi)(shi)有迥轉蓋和(he)(he)吊蓋；人(ren)(ren)孔(kong)(kong)(kong)(kong)開后速(su)度有普通式(shi)(shi)和(he)(he)快(kuai)開式(shi)(shi)，人(ren)(ren)孔(kong)(kong)(kong)(kong)結構和(he)(he)尺(chi)寸一般都已標準化(hua)，可參照有關手冊選用或(huo)設(she)計。