人(ren)孔(kong)(kong)(kong)(kong)是(shi)指(zhi)用于(yu)人(ren)員進出設備(bei)(bei)以便安(an)(an)裝、檢(jian)修和(he)安(an)(an)全(quan)檢(jian)查(cha)的開孔(kong)(kong)(kong)(kong)結構。主要由(you)短筒(tong)節（或(huo)(huo)短管）、法蘭和(he)帶把(ba)手的人(ren)孔(kong)(kong)(kong)(kong)蓋(gai)組成。從(cong)安(an)(an)全(quan)檢(jian)查(cha)考慮(lv)，壓(ya)力容器要求開設的人(ren)孔(kong)(kong)(kong)(kong)數及其小(xiao)尺寸見“檢(jian)查(cha)孔(kong)(kong)(kong)(kong)”。人(ren)孔(kong)(kong)(kong)(kong)材料有碳鋼(gang)和(he)不銹鋼(gang)。按受壓(ya)情(qing)況(kuang)人(ren)孔(kong)(kong)(kong)(kong)分為常壓(ya)和(he)受壓(ya)人(ren)孔(kong)(kong)(kong)(kong)；按形(xing)狀(zhuang)人(ren)孔(kong)(kong)(kong)(kong)分為圓形(xing)、橢圓形(xing)和(he)矩(ju)形(xing)人(ren)孔(kong)(kong)(kong)(kong)，矩(ju)形(xing)人(ren)孔(kong)(kong)(kong)(kong)僅(jin)適用于(yu)常壓(ya)設備(bei)(bei)；按安(an)(an)裝位置人(ren)孔(kong)(kong)(kong)(kong)分為水(shui)平和(he)垂直安(an)(an)裝人(ren)孔(kong)(kong)(kong)(kong)；人(ren)孔(kong)(kong)(kong)(kong)蓋(gai)固定方式有迥轉蓋(gai)和(he)吊蓋(gai)；人(ren)孔(kong)(kong)(kong)(kong)開后速度有普通式和(he)快開式，人(ren)孔(kong)(kong)(kong)(kong)結構和(he)尺寸一般都已標準(zhun)化，可參照有關手冊選(xuan)用或(huo)(huo)設計。