钢管公称通径、外径、壁厚、连接螺纹及推荐流量表.doc

GB/T7307-87非螺纹密封的管螺纹（牙形角55），GB3091-82、GB3092-82低压流体输送焊接管序号管子口径管子外径尺寸代号牙/寸螺距P基本直径外螺纹大径公差内螺纹小径公差mmin英吋分大径中径小径下偏差上偏差下偏差上偏差161/810G1/81280.9079.7289.1478.566-0.21400+0.282281/413.5G1/42191.33713.15712.30111.445-0.250+0.4453103/817G3/8316.66215.80614.9504151/221.3G1/24141.81420.95519.79318.631-0.284+0.5415G5/8522.91121.79420.5876203/426.8G3/4626.44125.27924.1177G7/8730.20129.03927.877825133.5G18112.30933.24931.77030.291-0.360+0.6409G11/8937.89736.41834.939103211/442.3G11/41041.91040.43138.952114011/248G11/21247.80346.32444.84512G13/41453.74652.26750.7881350260G21659.61458.13556.65614G21/41865.71064.23162.752-0.434156521/275G21/22075.18473.70572.22616G23/42281.53480.05578.5761780388.5G 32487.88486.40584.926181004114G 432113.030124.251110.072191255140G 540138.430136.951135.472201506165G 648163.830162.351160.872备注：1、（GB3091-82、GB3092-82）公称口径表示内径的参考尺寸2、对各种规格的钢管，其外径决定于YB2822-57圆锥状管螺纹的尺寸3、实际内径随管壁厚而变化，公称直径不等于外径减2倍壁厚。钢管公称通径、外径、壁厚、连接螺纹及推荐流量表（JB827-55、JB/Z95-67）序号公称通径DN纲管外径接头螺纹钢管壁厚推荐流量流速m/sin公制GB2878-81英吋公称压力MpaL./minm3/s2.58162531.5136M50.811111.40.63248M811111.41.42.54.1710-53.3235（6）1/810M101G1/81111.61.66.31.0510-45.35（3.72）481/4M141.5G1/4111.622254.1710-48.3510（12）3/818M181.5G3/811.61.622.5406.6710-48.5（5.9）6151/222M221.5G1/21.61.622.53631.0510-35.97203/428M272G3/41.622.53.541001.6710-35.3825134M332G12234.551602.67010-35.493211/442M422G11/422.54562504.1710-35.2104011/250M482*G11/22.534.55.574006.6710-35.31150263M602G 233.556.58.56301.0510-25.35126521/2753.54681010001.6710-25.041380390457101212502.08810-24.16141004120568.525004.1710-2