人孔(kong)直(zhi)徑及人孔(kong)中心距(ju)地板尺寸通常為　　

人孔(kong)(kong)已有成型(xing)產品，直(zhi)徑通常為600mm。人孔(kong)(kong)中心距(ju)地板一般為750mm。便于工作(zuo)人員在(zai)安裝、清洗(xi)、維(wei)護時進(jin)出(chu)油罐和通風。 　　

非金(jin)屬油罐(guan)的(de)(de)人(ren)(ren)孔(kong)(kong)(kong)設在罐(guan)頂上(shang)(shang)(shang)，金(jin)屬油罐(guan)的(de)(de)人(ren)(ren)孔(kong)(kong)(kong)設在罐(guan)壁下圈板(ban)上(shang)(shang)(shang)。大都為(wei)直徑600mm的(de)(de)圓(yuan)孔(kong)(kong)(kong)，其中心距底板(ban)750mm，為(wei)油罐(guan)清洗(xi)或維(wei)修(xiu)人(ren)(ren)員進出油罐(guan)用，又(you)稱作道門。檢(jian)修(xiu)清理油罐(guan)時(shi)(shi)刻利用人(ren)(ren)孔(kong)(kong)(kong)進行采(cai)光(guang)和通(tong)風。立式油罐(guan)的(de)(de)容(rong)量(liang)在5000m³以下時(shi)(shi)設1~2個(ge)(ge)(ge)人(ren)(ren)孔(kong)(kong)(kong)，5000m³以上(shang)(shang)(shang)的(de)(de)設2個(ge)(ge)(ge)人(ren)(ren)孔(kong)(kong)(kong)。人(ren)(ren)孔(kong)(kong)(kong)的(de)(de)安裝(zhuang)應(ying)與(yu)進出油管線相隔不大于(yu)90°。當只設一(yi)個(ge)(ge)(ge)人(ren)(ren)孔(kong)(kong)(kong)時(shi)(shi)，應(ying)將其置于(yu)罐(guan)頂透(tou)光(guang)孔(kong)(kong)(kong)的(de)(de)對(dui)面；當設2個(ge)(ge)(ge)人(ren)(ren)孔(kong)(kong)(kong)時(shi)(shi)，其中一(yi)個(ge)(ge)(ge)設在透(tou)光(guang)孔(kong)(kong)(kong)的(de)(de)對(dui)面，另一(yi)個(ge)(ge)(ge)應(ying)至(zhi)少與(yu)一(yi)個(ge)(ge)(ge)人(ren)(ren)孔(kong)(kong)(kong)相隔90°。 　　

人孔應有(you)一個設(she)在進(jin)出油(you)管(guan)右側附(fu)近，并盡量使人孔正對罐室(shi)密閉門，以(yi)便(bian)人員進(jin)出、維(wei)修油(you)罐和通(tong)風接管(guan)用。 　　

由于人孔(kong)(kong)安(an)裝在油罐的下層體圈(quan)上(shang)，防滲漏就(jiu)顯得特別重要(yao)。要(yao)求兩(liang)結合(he)面必須保證其平直(zhi)度(du)，無飄(piao)扭現象。加強板(ban)(ban)和法蘭(lan)應盡量(liang)在整塊鋼(gang)板(ban)(ban)上(shang)切割而不拼接(jie)。法蘭(lan)和蓋板(ban)(ban)上(shang)加工(gong)有(you)，在施(shi)工(gong)中要(yao)特別注意(yi)保護(hu)。密封用3mm厚(hou)石棉橡(xiang)膠墊(dian)片，不允許有(you)折裂。安(an)裝人孔(kong)(kong)蓋板(ban)(ban)上(shang)緊螺栓時，要(yao)成對角均(jun)與用力，以防孔(kong)(kong)蓋變形。