人孔(kong)(kong)(kong)(kong)(kong)是指用于(yu)人員(yuan)進(jin)出設備以便安(an)裝、檢(jian)修(xiu)和(he)安(an)全檢(jian)查的開(kai)孔(kong)(kong)(kong)(kong)(kong)結構。主(zhu)要(yao)由短筒節（或短管）、法蘭和(he)帶(dai)把手的人孔(kong)(kong)(kong)(kong)(kong)蓋(gai)組成。從安(an)全檢(jian)查考(kao)慮，壓(ya)(ya)(ya)力容(rong)器(qi)要(yao)求開(kai)設的人孔(kong)(kong)(kong)(kong)(kong)數(shu)及其小(xiao)尺寸(cun)見“檢(jian)查孔(kong)(kong)(kong)(kong)(kong)”。人孔(kong)(kong)(kong)(kong)(kong)材料有(you)(you)碳鋼(gang)和(he)不銹鋼(gang)。按(an)受壓(ya)(ya)(ya)情況人孔(kong)(kong)(kong)(kong)(kong)分為(wei)常(chang)壓(ya)(ya)(ya)和(he)受壓(ya)(ya)(ya)人孔(kong)(kong)(kong)(kong)(kong)；按(an)形(xing)狀(zhuang)人孔(kong)(kong)(kong)(kong)(kong)分為(wei)圓(yuan)形(xing)、橢圓(yuan)形(xing)和(he)矩(ju)形(xing)人孔(kong)(kong)(kong)(kong)(kong)，矩(ju)形(xing)人孔(kong)(kong)(kong)(kong)(kong)僅適用于(yu)常(chang)壓(ya)(ya)(ya)設備；按(an)安(an)裝位置人孔(kong)(kong)(kong)(kong)(kong)分為(wei)水平和(he)垂直安(an)裝人孔(kong)(kong)(kong)(kong)(kong)；人孔(kong)(kong)(kong)(kong)(kong)蓋(gai)固定方式有(you)(you)迥(jiong)轉(zhuan)蓋(gai)和(he)吊蓋(gai)；人孔(kong)(kong)(kong)(kong)(kong)開(kai)后速度有(you)(you)普(pu)通(tong)式和(he)快開(kai)式，人孔(kong)(kong)(kong)(kong)(kong)結構和(he)尺寸(cun)一般都已標(biao)準化，可參照有(you)(you)關手冊選(xuan)用或設計。