人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)是指用于(yu)人(ren)(ren)(ren)(ren)員進出設(she)備以便安(an)裝、檢(jian)修和(he)安(an)全檢(jian)查的(de)開孔(kong)(kong)(kong)(kong)結(jie)構。主要由短筒節（或短管(guan)）、法(fa)蘭(lan)和(he)帶把手的(de)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)蓋(gai)組成。從安(an)全檢(jian)查考慮，壓力容(rong)器要求開設(she)的(de)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)數及其小尺寸(cun)見“檢(jian)查孔(kong)(kong)(kong)(kong)”。人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)材料(liao)有碳鋼和(he)不銹鋼。按受壓情況人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)分為常壓和(he)受壓人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)；按形(xing)狀人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)分為圓形(xing)、橢圓形(xing)和(he)矩(ju)形(xing)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)，矩(ju)形(xing)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)僅適用于(yu)常壓設(she)備；按安(an)裝位置人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)分為水平和(he)垂直安(an)裝人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)；人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)蓋(gai)固(gu)定方式有迥轉(zhuan)蓋(gai)和(he)吊蓋(gai)；人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)開后速(su)度有普通式和(he)快開式，人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)結(jie)構和(he)尺寸(cun)一(yi)般都(dou)已(yi)標準化，可參照有關(guan)手冊(ce)選用或設(she)計。