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1、钢管规格及其理论重量表定义钢管是指两端开口并具有中空断面，其长度与周边之比较大的钢材，按生产方法可分为无缝钢管和焊接钢管，钢管的规格用外形尺寸（如外径或边长）及壁厚表示，其尺寸范围很广，从直径很小的毛细管直到直径达数米的大口径管。钢管可用于管道、热工设备、机械工业、石油地质勘探、容器、化学工业和特殊用途。 分类钢管分无缝钢管和焊接钢管（有缝管）两大类。按断面形状又可分为圆管和异形管，广泛应用的是圆形钢管，但也有一些方形、矩形、半圆形、六角形、等边三角形、八角形等异形钢管。 对于承受流体压力的钢管都要进行液压试验来检验其耐压能力和质量，在规定的压力下不发生泄漏、浸湿或膨胀为合格，有些钢管还要根据
2、标准或需方要求进行卷边试验、扩口试验、压扁试验等。 1、按生产方法分类（1）无缝钢管-热轧管、冷拔管、挤压管、顶管、冷轧管、（2）焊管（a）按工艺分-电弧焊管、电阻焊管（高频、低频）、气焊管、炉焊管（b）按焊缝分-直缝焊管、螺旋焊管2、按断面形状分类（1）简单断面钢管-圆形钢管、方形钢管、椭圆形钢管、三角形钢管、六角形钢管、菱形钢管、八角形钢管、半圆形钢圆、其他（2）复杂断面钢管-不等边六角形钢管、五瓣梅花形钢管、双凸形钢管、双凹形钢管、瓜子形钢管、圆锥形钢管、波纹形钢管、表壳钢管、其他3、按壁厚分类-薄壁钢管、厚壁钢管4、按用途分类-管道用钢管、热工设备用钢管、机械工业用钢管、石油、地质钻探
3、用钢管、容器钢管、化学工业用钢管、特殊用途钢管、其他4.化学成分检验 (1)GB3087-82低中压锅炉用无缝钢管规定。化学成分试验方法按GB222-84及GB223钢铁及合金化学分析方法中的有关部分。 (2)GB5310-95高压锅炉用无缝钢管规定。化学成分试验方法按GB222-84及钢铁及合金化学分析方法、GB223钢铁及合金化学分析方法中的有关部分。 (3)进口锅炉钢管的化学成分检验按合同规定的有关标准进行 钢管规格及其理论重量表(1)外径 /mm 壁 厚/mm0.50.60.81.01.21.41.51.61.82.02.22.52.83.03.23.5钢管理论质量/(kg/m)50.
4、0550.0650.0830.09980.0920.1090.1420.1730.201100.1170.1390.1810.2220.260120.1420.1690.2210.2710.3200.3660.3880.410130.1830.2410.2960.3430.4000.4250.450140.1980.2600.3210.3790.4350.4620.489150.1230.2800.3450.4080.4700.4990.529160.2280.3000.3700.4380.5040.5360.568170.2430.3200.3950.4680.3590.5730.60818
5、0.2570.3390.4190.4970.5730.6100.647190.2720.3590.4440.5270.6080.6470.687200.2870.3790.4690.5560.6420.6840.7260.8080.888210.3990.4930.5860.6770.7210.7650.8520.937220.4180.5180.6160.7040.7580.8050.8970.9861.074250.4770.5920.7040.8150.8690.9231.0301.1341.2371.387280.5370.6660.7930.9180.9801.04121.1631.
6、2821.4001.5721.740300.5760.7150.8520.9871.0541.1211.2521.3811.5081.6951.8781.997320.7640.9111.0651.1281.1991.3411.4801.6171.18192.0162.145340.8140.9711.1251.2021.2781.4291.5781.7251.9422.1542.293370.8881.0591.2291.3131.3971.5621.7261.8882.1272.3612.515380.9121.0891.2641.3501.4361.6071.7761.9422.1892
7、.4302.5892.7462.978400.9621.1481.3331.4241.5151.6961.8742.0512.3122.5692.7372.9043.150451.091.301.5l1.611.711.922.122.322.622.913.113.303.58461.331.541.651.751.962.172.382.682.983.183.383.668481.381.6l1.721.832.052.272.482.813.123.333.543.84501.441.681.791.912.142.372,592.933.263.483.694.0l钢管规格及其理论重
8、量表(2)外径 /mm 壁 厚/mm0.50.60.81.01.21.41.51.61.82.02.22.52.83.03.23.5钢管理论质量/(kg/m)5l1.471.711.831.952.182.422.652.993.333.553.774.10531.531.781.902.032.272.522.763.113.473.703.934.27541.561.821.942.072.322.562.813.173.543.774.014.36601.742.022.162.302.582.863.143.543.954.224.484.8863.51.842.142.292.442
9、.743.033.333.764.194.484.765.18652.352.502.813.113.413.854.294.594.885.31702.372.703.033.353.684.164.644.965.275.74762.762.943.293.654.004.535.055.405.746.26802.903.093.473.854.224.785.335.706.066.60833.OI3.2l3.603.994.384.965.545.926.306.86893.243.453.874.294.715.335.956.366.777.38953.463.694.144.5
10、95.035.706.376.8l17.247.90101.63.703.954.434.915.396.116.827.297.768.471023.723.964.454.935.416.136.857.327.808.50953.463.694.144.595.035.706.376.8l17.247.90101.63.703.954.434.915.396.116.827.297.768.471023.723.964.454.935.416.136.857.327.808.50方管方管理论重量计算公式4 x 壁厚 x (边长-壁厚) x 7.85 其中，边长和壁厚都以毫米为单位，直接把数值代入上述公式，得出即为每米方管的重量，以克为单位。 如30 x 30 x 2.5毫米的方管，按上述公式即可算出其每米重量为： 4 x 2.5 x (30-2.5) x 7.85=275 x 7.85=2158.75
