HG/T 20553《化工配管用無縫及焊接鋼管尺寸》壁厚系列對照表
HG/T20553壁厚系(xi)(xi)(xi)列見表3.3.3。標準中(zhong)Ⅰa系(xi)(xi)(xi)列,DN6~DN600鋼(gang)管(guan)(guan)的(de)外徑(jing)(jing)(jing)等效(xiao)采用(yong)(yong)了ISO4200,DN650~DN2000大(da)直徑(jing)(jing)(jing)焊接鋼(gang)管(guan)(guan)的(de)外徑(jing)(jing)(jing)等效(xiao)采用(yong)(yong)APISpec5L。Ⅰb系(xi)(xi)(xi)列是Ⅰa系(xi)(xi)(xi)列的(de)代用(yong)(yong)系(xi)(xi)(xi)列。鋼(gang)管(guan)(guan)的(de)外徑(jing)(jing)(jing),是將Ⅰa系(xi)(xi)(xi)列的(de)外徑(jing)(jing)(jing)圓整到整數(shu),并...