人(ren)(ren)(ren)孔(kong)(kong)(kong)是指用(yong)于(yu)人(ren)(ren)(ren)員進出設(she)備以便安裝、檢(jian)修和(he)(he)安全(quan)檢(jian)查(cha)的(de)開(kai)孔(kong)(kong)(kong)結構。主要由短(duan)筒節（或(huo)短(duan)管）、法蘭和(he)(he)帶(dai)把手(shou)的(de)人(ren)(ren)(ren)孔(kong)(kong)(kong)蓋(gai)組成。從安全(quan)檢(jian)查(cha)考(kao)慮，壓(ya)力容器要求(qiu)開(kai)設(she)的(de)人(ren)(ren)(ren)孔(kong)(kong)(kong)數及其小(xiao)尺寸(cun)見“檢(jian)查(cha)孔(kong)(kong)(kong)”。人(ren)(ren)(ren)孔(kong)(kong)(kong)材料有碳鋼和(he)(he)不銹鋼。按(an)受壓(ya)情況(kuang)人(ren)(ren)(ren)孔(kong)(kong)(kong)分(fen)為常壓(ya)和(he)(he)受壓(ya)人(ren)(ren)(ren)孔(kong)(kong)(kong)；按(an)形(xing)(xing)狀人(ren)(ren)(ren)孔(kong)(kong)(kong)分(fen)為圓(yuan)形(xing)(xing)、橢圓(yuan)形(xing)(xing)和(he)(he)矩(ju)形(xing)(xing)人(ren)(ren)(ren)孔(kong)(kong)(kong)，矩(ju)形(xing)(xing)人(ren)(ren)(ren)孔(kong)(kong)(kong)僅適用(yong)于(yu)常壓(ya)設(she)備；按(an)安裝位(wei)置人(ren)(ren)(ren)孔(kong)(kong)(kong)分(fen)為水平和(he)(he)垂(chui)直(zhi)安裝人(ren)(ren)(ren)孔(kong)(kong)(kong)；人(ren)(ren)(ren)孔(kong)(kong)(kong)蓋(gai)固定方(fang)式有迥轉蓋(gai)和(he)(he)吊蓋(gai)；人(ren)(ren)(ren)孔(kong)(kong)(kong)開(kai)后速度有普(pu)通式和(he)(he)快開(kai)式，人(ren)(ren)(ren)孔(kong)(kong)(kong)結構和(he)(he)尺寸(cun)一(yi)般(ban)都已(yi)標準化(hua)，可(ke)參照(zhao)有關手(shou)冊選用(yong)或(huo)設(she)計。