本标准适用于输送水及煤气用的砂型离心铸铁直管。铸铁管的使用应参照有关管道设计、施工规范。1 分级连续铸铁管按其壁厚分LA、A和B三级。2 尺寸、外形、重量2.1 尺寸和形状2.1.1 承插直管的形状和尺寸应符合图1(略)、表1和表2的规定。公称口径各部尺寸Dgabce75~4501510206500~8001812257900~12002014308表1 承口尺寸公称口径Dg承口内径D3ABCEPιFδXP75113.0362612109097551332100138.03626121095107551332150189.036261210100107551332200240.038281310100117751333250293.6383215111051283 51837300344.8383316111051385 51838350396.0403417111101387 51839400447.640361811110148952440450498.8403719111151491 52441500552.0404021121151597 62445600654.84244231212016101 62447700757.04248261212517106 62450800860.04551281213018111 62452900963.04556311213519115 6245510001067.05060331314021121 6245911001170.05064361314522126 6246212001272.0526838131502313062464表2 连续铸铁管的壁厚及重量公称口径Dgmm外径D2mm壁厚T,mm承口凸部重量kg 直部1米重量kg有效长度L,mm400050006000总重量,kgLA级A级B级LA级A级B级LA级A级B级LA级A级B级LA级A级B级7593.09.09.09.06.6617.117.117.175.175.175.192.292.292.2 |