鍛鋼制承插焊管件結構型式與尺寸公差的極限偏差表
管(guan)件(jian)(jian)(jian)（按(an)計算其壓力額定值的(de)基準管(guan)子）分為Sch80和(he)Sch160兩個(ge)等級。根據配接管(guan)子外徑的(de)不同(tong)(tong)(tong)選(xuan)擇(ze)，管(guan)件(jian)(jian)(jian)承口內(nei)徑尺(chi)(chi)寸(cun)（d1）和(he)流通孔直(zhi)徑尺(chi)(chi)寸(cun)（d2）分別規定了A、B兩個(ge)系(xi)(xi)列(lie)(lie)，推薦優先選(xuan)用A系(xi)(xi)列(lie)(lie)。 同(tong)(tong)(tong)一管(guan)件(jian)(jian)(jian)的(de)各(ge)承口處尺(chi)(chi)寸(cun)應同(tong)(tong)(tong)為A系(xi)(xi)列(lie)(lie)或(huo)B系(xi)(xi)列(lie)(lie)。但在供需雙(shuang)方(fang)協商...
