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1、低低压压流流体体输输送送用用焊焊接接钢钢管管规规格格表表公称口径外径普通钢管加厚钢管/mm/in公称尺寸/mm允许偏差壁厚理论质量/Kgm-1壁厚理论质量/Kgm-1公称尺寸/mm允许偏差公称尺寸/mm允许偏差DN61/810.00.50mm212%15%0.392.512%15%0.46DN81/413.52.250.622.750.73DN103/817.02.250.822.750.97DN151/221.32.751.253.251.45DN20DN203/43/426.826.82.751.633.52.012.01DN25DN251133.533.53.252.4242.912.9
2、1DN32DN321 11/41/442.342.33.253.1343.783.78DN40DN401 11/21/248.048.03.53.844.254.584.58DN50DN502260.060.0%13.54.884.56.166.16DN6521/275.53.756.644.57.88DN80388.548.344.759.81DN1004114.0410.85513.44DN1255140.04.515.045.518.24DN1506165.04.517.815.521.63常常用用热热轧轧槽槽钢钢（GB707-88GB707-88）型号截面面积/cm2理论质量/KgKm
3、-1hbdtrr1550374.576.9285.4386.363404.87.58.4516.6348 880435810.2488.0458.0451010100485.38.512.74810.00710.00712.6126535.5915.69212.31814a1405869.518.51614.53514b1406089.521.31616.733热热轧轧扁扁钢钢（GB704-83GB704-83）宽度/mm厚度/mm34 45678910理论质量/KgKm-125250.590.780.780.981.181.371.571.771.96300.710.941.181.411.
4、651.882.122.36350.821.11.371.651.922.22.472.7540400.941.261.261.571.882.22.512.833.14451.061.411.772.122.472.833.183.53501.181.571.962.362.753.143.533.93常常用用热热轧轧等等边边角角钢钢（GB-9786-86GB-9786-86）型号尺寸/mm截面面积/cm2理论质量/KgKm-1bdr2202033.51.1320.8894 41.4591.1451.1452.5252531.4321.1244 41.8591.4591.4593303034.51.7491.3734 42.2761.7861.7863.63632.1091.65642.7562.16353.3822.65444040352.3591.8524 43.0862.4222.42253.7912.9764.54532.6592.08843.4862.73654.2923.36965.0763.9855505035.52.9712.33243.8973.0595 54.8033.773.7765.6884.465