人(ren)(ren)(ren)孔(kong)(kong)(kong)是(shi)指用于人(ren)(ren)(ren)員進出設備以便(bian)安裝、檢修和(he)安全檢查的(de)開(kai)(kai)(kai)孔(kong)(kong)(kong)結構(gou)。主(zhu)要由短筒(tong)節（或(huo)短管）、法蘭和(he)帶把(ba)手的(de)人(ren)(ren)(ren)孔(kong)(kong)(kong)蓋(gai)組成(cheng)。從安全檢查考慮，壓(ya)力容器要求開(kai)(kai)(kai)設的(de)人(ren)(ren)(ren)孔(kong)(kong)(kong)數(shu)及其(qi)小(xiao)尺(chi)(chi)寸見(jian)“檢查孔(kong)(kong)(kong)”。人(ren)(ren)(ren)孔(kong)(kong)(kong)材(cai)料有(you)碳鋼(gang)和(he)不銹鋼(gang)。按受壓(ya)情況人(ren)(ren)(ren)孔(kong)(kong)(kong)分為(wei)(wei)常(chang)(chang)壓(ya)和(he)受壓(ya)人(ren)(ren)(ren)孔(kong)(kong)(kong)；按形(xing)狀人(ren)(ren)(ren)孔(kong)(kong)(kong)分為(wei)(wei)圓(yuan)形(xing)、橢圓(yuan)形(xing)和(he)矩(ju)形(xing)人(ren)(ren)(ren)孔(kong)(kong)(kong)，矩(ju)形(xing)人(ren)(ren)(ren)孔(kong)(kong)(kong)僅(jin)適用于常(chang)(chang)壓(ya)設備；按安裝位(wei)置人(ren)(ren)(ren)孔(kong)(kong)(kong)分為(wei)(wei)水平(ping)和(he)垂直安裝人(ren)(ren)(ren)孔(kong)(kong)(kong)；人(ren)(ren)(ren)孔(kong)(kong)(kong)蓋(gai)固定方式有(you)迥轉(zhuan)蓋(gai)和(he)吊蓋(gai)；人(ren)(ren)(ren)孔(kong)(kong)(kong)開(kai)(kai)(kai)后(hou)速度(du)有(you)普通(tong)式和(he)快開(kai)(kai)(kai)式，人(ren)(ren)(ren)孔(kong)(kong)(kong)結構(gou)和(he)尺(chi)(chi)寸一般(ban)都已標準化，可參照有(you)關手冊選用或(huo)設計(ji)。