人(ren)(ren)孔(kong)(kong)(kong)是指用(yong)于人(ren)(ren)員進(jin)出設備(bei)以便安(an)(an)(an)(an)裝(zhuang)、檢修和(he)(he)安(an)(an)(an)(an)全(quan)檢查(cha)的(de)開(kai)(kai)孔(kong)(kong)(kong)結(jie)構。主(zhu)要由短筒(tong)節（或短管）、法蘭和(he)(he)帶把手(shou)的(de)人(ren)(ren)孔(kong)(kong)(kong)蓋組成(cheng)。從安(an)(an)(an)(an)全(quan)檢查(cha)考慮，壓力容器要求開(kai)(kai)設的(de)人(ren)(ren)孔(kong)(kong)(kong)數(shu)及(ji)其小尺(chi)寸見“檢查(cha)孔(kong)(kong)(kong)”。人(ren)(ren)孔(kong)(kong)(kong)材料有碳鋼和(he)(he)不銹鋼。按(an)受(shou)壓情況人(ren)(ren)孔(kong)(kong)(kong)分為常(chang)壓和(he)(he)受(shou)壓人(ren)(ren)孔(kong)(kong)(kong)；按(an)形(xing)(xing)狀人(ren)(ren)孔(kong)(kong)(kong)分為圓形(xing)(xing)、橢(tuo)圓形(xing)(xing)和(he)(he)矩形(xing)(xing)人(ren)(ren)孔(kong)(kong)(kong)，矩形(xing)(xing)人(ren)(ren)孔(kong)(kong)(kong)僅適用(yong)于常(chang)壓設備(bei)；按(an)安(an)(an)(an)(an)裝(zhuang)位置人(ren)(ren)孔(kong)(kong)(kong)分為水平和(he)(he)垂直安(an)(an)(an)(an)裝(zhuang)人(ren)(ren)孔(kong)(kong)(kong)；人(ren)(ren)孔(kong)(kong)(kong)蓋固定方式有迥轉(zhuan)蓋和(he)(he)吊蓋；人(ren)(ren)孔(kong)(kong)(kong)開(kai)(kai)后(hou)速度有普通式和(he)(he)快(kuai)開(kai)(kai)式，人(ren)(ren)孔(kong)(kong)(kong)結(jie)構和(he)(he)尺(chi)寸一般(ban)都已(yi)標準(zhun)化，可(ke)參照有關手(shou)冊選用(yong)或設計(ji)。