人(ren)(ren)(ren)孔(kong)(kong)(kong)是指(zhi)用(yong)于人(ren)(ren)(ren)員進(jin)出設(she)備(bei)以便安(an)(an)裝(zhuang)(zhuang)、檢(jian)(jian)修(xiu)和(he)(he)安(an)(an)全檢(jian)(jian)查(cha)的開(kai)孔(kong)(kong)(kong)結(jie)構(gou)。主要由短筒節（或短管）、法蘭和(he)(he)帶把手的人(ren)(ren)(ren)孔(kong)(kong)(kong)蓋(gai)組(zu)成(cheng)。從安(an)(an)全檢(jian)(jian)查(cha)考慮，壓力容器要求開(kai)設(she)的人(ren)(ren)(ren)孔(kong)(kong)(kong)數及(ji)其小尺寸(cun)見“檢(jian)(jian)查(cha)孔(kong)(kong)(kong)”。人(ren)(ren)(ren)孔(kong)(kong)(kong)材料有(you)碳(tan)鋼和(he)(he)不銹鋼。按(an)受壓情(qing)況人(ren)(ren)(ren)孔(kong)(kong)(kong)分為常壓和(he)(he)受壓人(ren)(ren)(ren)孔(kong)(kong)(kong)；按(an)形狀(zhuang)人(ren)(ren)(ren)孔(kong)(kong)(kong)分為圓形、橢圓形和(he)(he)矩(ju)形人(ren)(ren)(ren)孔(kong)(kong)(kong)，矩(ju)形人(ren)(ren)(ren)孔(kong)(kong)(kong)僅(jin)適用(yong)于常壓設(she)備(bei)；按(an)安(an)(an)裝(zhuang)(zhuang)位(wei)置人(ren)(ren)(ren)孔(kong)(kong)(kong)分為水平和(he)(he)垂直安(an)(an)裝(zhuang)(zhuang)人(ren)(ren)(ren)孔(kong)(kong)(kong)；人(ren)(ren)(ren)孔(kong)(kong)(kong)蓋(gai)固(gu)定(ding)方式有(you)迥轉(zhuan)蓋(gai)和(he)(he)吊蓋(gai)；人(ren)(ren)(ren)孔(kong)(kong)(kong)開(kai)后速度有(you)普通(tong)式和(he)(he)快開(kai)式，人(ren)(ren)(ren)孔(kong)(kong)(kong)結(jie)構(gou)和(he)(he)尺寸(cun)一般都(dou)已標準化，可參(can)照有(you)關手冊選用(yong)或設(she)計(ji)。