人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)是指用于(yu)人(ren)(ren)(ren)(ren)員進出設(she)備以便安(an)裝、檢(jian)修(xiu)和(he)(he)安(an)全檢(jian)查(cha)的開孔(kong)(kong)(kong)結(jie)構。主要(yao)由(you)短(duan)筒節（或短(duan)管）、法蘭和(he)(he)帶把手的人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)蓋組成(cheng)。從安(an)全檢(jian)查(cha)考慮，壓力容器要(yao)求(qiu)開設(she)的人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)數及其小尺寸見“檢(jian)查(cha)孔(kong)(kong)(kong)”。人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)材料有(you)(you)碳鋼(gang)和(he)(he)不銹鋼(gang)。按(an)受壓情況人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)分(fen)為常壓和(he)(he)受壓人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)；按(an)形狀人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)分(fen)為圓形、橢(tuo)圓形和(he)(he)矩(ju)形人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)，矩(ju)形人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)僅適用于(yu)常壓設(she)備；按(an)安(an)裝位置人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)分(fen)為水平和(he)(he)垂直(zhi)安(an)裝人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)；人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)蓋固定方式有(you)(you)迥轉蓋和(he)(he)吊蓋；人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)開后(hou)速度(du)有(you)(you)普通(tong)式和(he)(he)快開式，人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)結(jie)構和(he)(he)尺寸一般(ban)都已(yi)標(biao)準化，可參照有(you)(you)關(guan)手冊(ce)選用或設(she)計。