人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)是(shi)指用(yong)于人(ren)(ren)(ren)(ren)(ren)員進出設(she)備以(yi)便安(an)裝、檢(jian)(jian)修和(he)安(an)全檢(jian)(jian)查(cha)的(de)開(kai)孔(kong)(kong)(kong)(kong)(kong)結構(gou)。主要(yao)由短筒節(jie)（或(huo)短管）、法蘭和(he)帶(dai)把(ba)手的(de)人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)蓋(gai)組成(cheng)。從安(an)全檢(jian)(jian)查(cha)考慮，壓力容(rong)器要(yao)求開(kai)設(she)的(de)人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)數及(ji)其(qi)小(xiao)尺(chi)寸見“檢(jian)(jian)查(cha)孔(kong)(kong)(kong)(kong)(kong)”。人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)材料有(you)(you)碳鋼(gang)(gang)和(he)不銹(xiu)鋼(gang)(gang)。按(an)受壓情況(kuang)人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)分為(wei)常(chang)壓和(he)受壓人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)；按(an)形(xing)狀人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)分為(wei)圓形(xing)、橢圓形(xing)和(he)矩形(xing)人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)，矩形(xing)人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)僅適用(yong)于常(chang)壓設(she)備；按(an)安(an)裝位置人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)分為(wei)水平和(he)垂(chui)直安(an)裝人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)；人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)蓋(gai)固定方式(shi)有(you)(you)迥轉蓋(gai)和(he)吊蓋(gai)；人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)開(kai)后(hou)速度有(you)(you)普(pu)通(tong)式(shi)和(he)快開(kai)式(shi)，人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)結構(gou)和(he)尺(chi)寸一般都已標準化，可參照有(you)(you)關手冊選用(yong)或(huo)設(she)計。