人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)是(shi)指用(yong)(yong)于(yu)人(ren)(ren)(ren)(ren)員進出設(she)備(bei)以(yi)便安裝、檢修和(he)(he)(he)安全檢查的開(kai)(kai)孔(kong)(kong)(kong)結構。主要由短筒節（或短管）、法蘭和(he)(he)(he)帶把手的人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)蓋組成(cheng)。從安全檢查考慮，壓(ya)(ya)力容器要求開(kai)(kai)設(she)的人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)數(shu)及其小尺(chi)(chi)寸(cun)見“檢查孔(kong)(kong)(kong)”。人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)材料有碳鋼和(he)(he)(he)不(bu)銹鋼。按(an)(an)受壓(ya)(ya)情況人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)分為常(chang)壓(ya)(ya)和(he)(he)(he)受壓(ya)(ya)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)；按(an)(an)形(xing)(xing)狀人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)分為圓形(xing)(xing)、橢圓形(xing)(xing)和(he)(he)(he)矩形(xing)(xing)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)，矩形(xing)(xing)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)僅適用(yong)(yong)于(yu)常(chang)壓(ya)(ya)設(she)備(bei)；按(an)(an)安裝位置(zhi)人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)分為水平(ping)和(he)(he)(he)垂(chui)直安裝人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)；人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)蓋固定方式(shi)有迥轉蓋和(he)(he)(he)吊蓋；人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)開(kai)(kai)后(hou)速度有普通式(shi)和(he)(he)(he)快開(kai)(kai)式(shi)，人(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)結構和(he)(he)(he)尺(chi)(chi)寸(cun)一般都已標準化，可參照有關手冊選用(yong)(yong)或設(she)計。