人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)是指用(yong)于人(ren)(ren)(ren)員進出設備以便安裝(zhuang)、檢(jian)修和(he)(he)安全檢(jian)查(cha)(cha)的(de)開孔(kong)(kong)(kong)(kong)結構(gou)。主要(yao)由短筒(tong)節（或短管）、法蘭和(he)(he)帶把手(shou)的(de)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)蓋組成(cheng)。從安全檢(jian)查(cha)(cha)考慮，壓(ya)力容器(qi)要(yao)求開設的(de)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)數及其(qi)小尺寸見“檢(jian)查(cha)(cha)孔(kong)(kong)(kong)(kong)”。人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)材(cai)料有(you)(you)碳鋼(gang)和(he)(he)不銹鋼(gang)。按(an)受壓(ya)情況人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)分為常(chang)壓(ya)和(he)(he)受壓(ya)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)；按(an)形(xing)狀人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)分為圓形(xing)、橢圓形(xing)和(he)(he)矩(ju)形(xing)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)，矩(ju)形(xing)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)僅(jin)適(shi)用(yong)于常(chang)壓(ya)設備；按(an)安裝(zhuang)位置人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)分為水平和(he)(he)垂(chui)直安裝(zhuang)人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)；人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)蓋固(gu)定方式(shi)有(you)(you)迥轉(zhuan)蓋和(he)(he)吊(diao)蓋；人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)開后(hou)速度有(you)(you)普通式(shi)和(he)(he)快開式(shi)，人(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)結構(gou)和(he)(he)尺寸一(yi)般都(dou)已(yi)標準化，可(ke)參照有(you)(you)關手(shou)冊(ce)選用(yong)或設計。