人孔(kong)分為緊(jin)急泄(xie)壓人孔(kong)、防爆阻(zu)火呼(hu)吸人孔(kong)、罐(guan)頂人孔(kong)、罐(guan)壁人孔(kong)和帶芯人孔(kong)

人(ren)孔已有成型產品，直(zhi)徑(jing)通常(chang)為600mm。人(ren)孔中心距(ju)地板一般為750mm。便于工作人(ren)員在安裝、清洗、維護時進出油罐或(huo)通風。

非金(jin)(jin)屬(shu)油罐(guan)(guan)(guan)的人(ren)(ren)孔(kong)(kong)(kong)(kong)設在(zai)罐(guan)(guan)(guan)頂上(shang)，金(jin)(jin)屬(shu)油罐(guan)(guan)(guan)的人(ren)(ren)孔(kong)(kong)(kong)(kong)設在(zai)罐(guan)(guan)(guan)壁***下(xia)圈板(ban)上(shang)。大都為(wei)直徑600mm的圓(yuan)孔(kong)(kong)(kong)(kong)，其(qi)中心距底板(ban)750mm，為(wei)油罐(guan)(guan)(guan)清洗或維修人(ren)(ren)員(yuan)進出油罐(guan)(guan)(guan)用，又稱(cheng)作道門。檢修清理油罐(guan)(guan)(guan)時刻利用人(ren)(ren)孔(kong)(kong)(kong)(kong)進行采光和(he)通風(feng)。立式(shi)油罐(guan)(guan)(guan)的容量在(zai)5000m3以下(xia)時設1~2個(ge)人(ren)(ren)孔(kong)(kong)(kong)(kong)，5000m3以上(shang)的設2個(ge)人(ren)(ren)孔(kong)(kong)(kong)(kong)。人(ren)(ren)孔(kong)(kong)(kong)(kong)的安(an)裝(zhuang)應與進出油管線相隔(ge)不大于(yu)90°。當只設一(yi)個(ge)人(ren)(ren)孔(kong)(kong)(kong)(kong)時，應將其(qi)置于(yu)罐(guan)(guan)(guan)頂透(tou)光孔(kong)(kong)(kong)(kong)的對面;當設2個(ge)人(ren)(ren)孔(kong)(kong)(kong)(kong)時，其(qi)中一(yi)個(ge)設在(zai)透(tou)光孔(kong)(kong)(kong)(kong)的對面，另一(yi)個(ge)應至(zhi)少(shao)與第 一(yi)個(ge)人(ren)(ren)孔(kong)(kong)(kong)(kong)相隔(ge)90°。

人(ren)孔(kong)應有一個設(she)在進出油管右側附(fu)近(jin)，并盡量使人(ren)孔(kong)正對罐室(shi)密閉門，以便人(ren)員進出、維修(xiu)油罐和通風接管用。

由于人孔(kong)安裝在(zai)油罐的下層體圈上(shang)(shang)，防(fang)滲漏就顯得(de)特別重要。要求兩法蘭(lan)(lan)結(jie)合面必須保證其(qi)平(ping)直(zhi)度，無飄扭(niu)現象。加強板(ban)(ban)(ban)和法蘭(lan)(lan)應(ying)盡量在(zai)整塊鋼板(ban)(ban)(ban)上(shang)(shang)切割而不拼接。法蘭(lan)(lan)和蓋板(ban)(ban)(ban)上(shang)(shang)加工(gong)有密(mi)封圈，在(zai)施工(gong)中要特別注意保護(hu)。密(mi)封用(yong)3mm厚石棉橡膠墊片，不允許(xu)有折(zhe)裂(lie)。安裝人孔(kong)蓋板(ban)(ban)(ban)上(shang)(shang)緊螺栓時，要成對角(jiao)均勻用(yong)力，以防(fang)孔(kong)蓋變形。