人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)是(shi)指用于人(ren)(ren)(ren)員(yuan)進出設(she)(she)備以便安(an)裝(zhuang)(zhuang)、檢修(xiu)和(he)安(an)全檢查(cha)的(de)開(kai)孔(kong)(kong)(kong)(kong)(kong)結(jie)構。主要由短(duan)筒節（或(huo)短(duan)管）、法蘭(lan)和(he)帶把手的(de)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)蓋組成(cheng)。從安(an)全檢查(cha)考慮，壓力容器要求開(kai)設(she)(she)的(de)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)數(shu)及其小尺寸見(jian)“檢查(cha)孔(kong)(kong)(kong)(kong)(kong)”。人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)材料有碳鋼和(he)不銹鋼。按受壓情況(kuang)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)分(fen)為常壓和(he)受壓人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)；按形(xing)(xing)(xing)狀人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)分(fen)為圓(yuan)形(xing)(xing)(xing)、橢圓(yuan)形(xing)(xing)(xing)和(he)矩形(xing)(xing)(xing)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)，矩形(xing)(xing)(xing)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)僅(jin)適用于常壓設(she)(she)備；按安(an)裝(zhuang)(zhuang)位置人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)分(fen)為水(shui)平和(he)垂直安(an)裝(zhuang)(zhuang)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)；人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)蓋固定(ding)方式有迥轉蓋和(he)吊蓋；人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)開(kai)后速(su)度有普通(tong)式和(he)快(kuai)開(kai)式，人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)結(jie)構和(he)尺寸一般都已標準化，可參照有關手冊選用或(huo)設(she)(she)計。