人(ren)(ren)孔(kong)(kong)(kong)(kong)是指用(yong)于(yu)人(ren)(ren)員進出設(she)備(bei)以便安(an)(an)裝(zhuang)、檢修和(he)(he)(he)安(an)(an)全檢查的開(kai)(kai)孔(kong)(kong)(kong)(kong)結構。主要由(you)短(duan)筒節（或(huo)短(duan)管(guan)）、法蘭和(he)(he)(he)帶把手的人(ren)(ren)孔(kong)(kong)(kong)(kong)蓋(gai)組成(cheng)。從安(an)(an)全檢查考慮，壓(ya)(ya)(ya)力容器要求開(kai)(kai)設(she)的人(ren)(ren)孔(kong)(kong)(kong)(kong)數及(ji)其小尺(chi)寸見“檢查孔(kong)(kong)(kong)(kong)”。人(ren)(ren)孔(kong)(kong)(kong)(kong)材料有(you)(you)碳(tan)鋼和(he)(he)(he)不銹鋼。按(an)(an)受(shou)壓(ya)(ya)(ya)情況人(ren)(ren)孔(kong)(kong)(kong)(kong)分為常壓(ya)(ya)(ya)和(he)(he)(he)受(shou)壓(ya)(ya)(ya)人(ren)(ren)孔(kong)(kong)(kong)(kong)；按(an)(an)形狀(zhuang)人(ren)(ren)孔(kong)(kong)(kong)(kong)分為圓形、橢圓形和(he)(he)(he)矩形人(ren)(ren)孔(kong)(kong)(kong)(kong)，矩形人(ren)(ren)孔(kong)(kong)(kong)(kong)僅適用(yong)于(yu)常壓(ya)(ya)(ya)設(she)備(bei)；按(an)(an)安(an)(an)裝(zhuang)位(wei)置人(ren)(ren)孔(kong)(kong)(kong)(kong)分為水平和(he)(he)(he)垂直安(an)(an)裝(zhuang)人(ren)(ren)孔(kong)(kong)(kong)(kong)；人(ren)(ren)孔(kong)(kong)(kong)(kong)蓋(gai)固定方式(shi)(shi)有(you)(you)迥轉蓋(gai)和(he)(he)(he)吊蓋(gai)；人(ren)(ren)孔(kong)(kong)(kong)(kong)開(kai)(kai)后速度有(you)(you)普通式(shi)(shi)和(he)(he)(he)快開(kai)(kai)式(shi)(shi)，人(ren)(ren)孔(kong)(kong)(kong)(kong)結構和(he)(he)(he)尺(chi)寸一般(ban)都已標準(zhun)化，可參(can)照(zhao)有(you)(you)關手冊選用(yong)或(huo)設(she)計(ji)。