钢管公称直径与外径对照表

钢管公称直钢管外径×壁厚径（mm）（mm）保温管外径×壁厚mm)最小覆土深度（m）管中心距沟宽B垫砂厚C机动车道非机动车道E（mm）（mm）（mm）DN40D48×3110×2.53408502000.80.7DN50D60×3.5140×33609002000.80.7DN65D76×4140×33809202000.80.7DN80D89×4160×3.24009602000.80.7DN100D108×4200×3.940010002000.80.7DN125D133×4.5225×4.445011002000.80.7DN150D159×4.5250×4.9450110020010.7DN200D219×6315×6.2500130020010.7DN250D273×6365×6.6580140025010.7DN300D325×7420×7660150025010.7DN350D377×7500×7.872017002501.20.9DN400D426×7550×8.878018003001.20.9DN450D478×7600×8.890020003001.20.9DN500D529×8655×9.8100021003001.20.9DN600D630×8760×11106024003001.31DN700D720×9850×12125027003001.31DN800D820×10960×14135029003001.31.1DN900D920×121055×14145031003001.31.1DN1000D1020×131155×14155033103001.31.1道保温厚度315565481184619200.01503475365615461288673250.0187.53512.5420670481394724300.02253550500750621526776350.0262.53587.5550800621626826400.03003625600850611728878450.0337.53662.5655905631834929500.0375370076010106520401030600.0450377585011006522201120700.0525385096012107024301220800.06003925105513056826241319900.067540001155140568282414191000.07504075