人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)是指用(yong)于人(ren)(ren)(ren)員進出設(she)備以便安(an)裝(zhuang)、檢(jian)(jian)修和(he)安(an)全檢(jian)(jian)查(cha)的開(kai)孔(kong)(kong)(kong)(kong)(kong)(kong)結構。主要(yao)由短筒節（或(huo)短管）、法(fa)蘭和(he)帶(dai)把手的人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)蓋(gai)(gai)組成。從(cong)安(an)全檢(jian)(jian)查(cha)考慮，壓(ya)力容器要(yao)求(qiu)開(kai)設(she)的人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)數及其小尺寸見“檢(jian)(jian)查(cha)孔(kong)(kong)(kong)(kong)(kong)(kong)”。人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)材料(liao)有(you)碳(tan)鋼(gang)和(he)不銹鋼(gang)。按(an)受壓(ya)情況人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)分(fen)(fen)為常壓(ya)和(he)受壓(ya)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)；按(an)形(xing)(xing)狀(zhuang)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)分(fen)(fen)為圓形(xing)(xing)、橢圓形(xing)(xing)和(he)矩(ju)形(xing)(xing)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)，矩(ju)形(xing)(xing)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)僅適用(yong)于常壓(ya)設(she)備；按(an)安(an)裝(zhuang)位置(zhi)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)分(fen)(fen)為水平和(he)垂直安(an)裝(zhuang)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)；人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)蓋(gai)(gai)固(gu)定方式有(you)迥轉蓋(gai)(gai)和(he)吊蓋(gai)(gai)；人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)開(kai)后速度有(you)普通式和(he)快開(kai)式，人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)(kong)結構和(he)尺寸一(yi)般都已標準(zhun)化(hua)，可參(can)照有(you)關手冊(ce)選用(yong)或(huo)設(she)計。