钢管管道的承压问题一直是困扰广大钢管从业人员的细节性问题, 每个人都能通过钢仔压力壁厚对照表来比对钢管的承压能力, 但具体到某一根铜管上来讲, 这根钢管的承压能力到底有多大,这个问题就有点棘手了。因为通过对照表来查询, 这只是最保守的方法,而且这个数据也不是完全正确,这些数据虽然也是通过大量的科学实验得出的, 但它也只是一个大体数据并不绝对准确。 因为钢管承压能力这个问题还要受工作环境中温度、内部流体、钢管生产流程等等一系列的问题所影响。如果在我们测算出铜管的外径、壁厚、铜管材质的抗拉强度的情况下, 我们可以通过计算分式来计算钢管的承压能力,当然这里面涉及到的数据都是经过实际测算的准确的,且钢管材质的机械性能是有保证的。这样我们获取的数据就有了一定保证。 钢管承压能力和壁厚的计算公式: 压力= (壁厚×2×钢管材质抗拉强度) / (外径*系数) 上面所提到的钢管压力系数不是一个固定的数值, 它是要根据铜管的实际承压能力而变的。下面就是钢管压力系数的界定范围: 当压力P<7Mpa 时,系数为S=8 ; 当 7<钢管压力P<17.5时, 系数为S =6 ; 当压力P>17.5时, 系数为S =4 。
一、无缝碳钢管压力及壁厚表 单位:mm
材料 | PN MPa | DN | 10 | 15 | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 |
| 20# 12CrMo 15CrMo 12Cr1MoV | ≤1.6 | 2.5 | 3 | 3 | 3 | 3 | 3.5 | 3.5 | 4 | 4 | 4 | 4 | 4.5 | 5 | 6 | 7 | 7 | 8 | 8 | 8 | 9 |
| 2.5 | 2.5 | 3 | 3 | 3 | 2 | 3.5 | 3.5 | 4 | 4 | 4 | 4 | 4.5 | 5 | 6 | 7 | 7 | 8 | 8 | 9 | 10 |
| 4.0 | 2.5 | 3 | 3 | 3 | 3 | 3.5 | 3.5 | 4 | 4 | 4.5 | 5 | 5.5 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 15 |
| 6.4 | 3 | 3 | 3 | 3.5 | 3.5 | 3.5 | 4 | 4.5 | 5 | 6 | 7 | 8 | 9 | 11 | 12 | 14 | 16 | 17 | 19 | 22 |
| 10.0 | 3 | 3.5 | 3.5 | 4 | 4.5 | 4.5 | 5 | 6 | 7 | 8 | 9 | 10 | 13 | 15 | 18 | 20 | 22 |
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| 16.0 | 4 | 4.5 | 5 | 5 | 6 | 6 | 7 | 8 | 9 | 11 | 13 | 15 | 19 | 24 | 26 | 30 | 34 |
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| 20.0 | 4 | 4.5 | 5 | 6 | 6 | 7 | 8 | 9 | 11 | 13 | 15 | 18 | 22 | 28 | 32 | 36 |
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| 4.0T | 3.5 | 4 | 4 | 4.5 | 5 | 5 | 5.5 |
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| 10Cr5Mo | ≤1.6 | 2.5 | 3 | 3 | 3 | 3 | 3.5 | 3.5 | 4 | 4.5 | 4 | 4 | 4.5 | 5.5 | 7 | 7 | 8 | 8 | 8 | 8 | 9 |
| 2.5 | 2.5 | 3 | 3 | 3 | 3 | 3.5 | 3.5 | 4 | 4.5 | 4 | 5 | 4.5 | 5.5 | 7 | 7 | 8 | 9 | 9 | 10 | 12 |
| 4.0 | 2.5 | 3 | 3 | 3 | 3 | 3.5 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 8 | 9 | 10 | 11 | 12 | 14 | 15 | 18 |
| 6.4 | 3 | 3 | 3 | 3.5 | 4 | 4 | 4.5 | 5 | 5.5 | 7 | 8 | 9 | 11 | 13 | 14 | 16 | 18 | 20 | 22 | 26 |
| 10.0 | 3 | 3.5 | 4 | 4 | 4.5 | 5 | 5.5 | 7 | 8 | 9 | 10 | 12 | 15 | 18 | 22 | 24 | 26 |
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| 16.0 | 4 | 4.5 | 5 | 5 | 6 | 7 | 8 | 9 | 10 | 12 | 15 | 18 | 22 | 28 | 32 | 36 | 40 |
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| 20.0 | 4 | 4.5 | 5 | 6 | 7 | 8 | 9 | 11 | 12 | 15 | 18 | 22 | 26 | 34 | 38 |
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| 4.0T | 3.5 | 4 | 4 | 4.5 | 5 | 5 | 5.5 |
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| 16Mn 15MnV | ≤1.6 | 2.5 | 2.5 | 2.5 | 3 | 3 | 3 | 3 | 3.5 | 3.5 | 3.5 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 6 | 6 | 6 | 7 |
| 2.5 | 2.5 | 2.5 | 2.5 | 3 | 3 | 3 | 3 | 3.5 | 3.5 | 3.5 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 7 | 7 | 8 | 9 |
| 4.0 | 2.5 | 2.5 | 2.5 | 3 | 3 | 3 | 3 | 3.5 | 3.5 | 4 | 4.5 | 5 | 6 | 7 | 8 | 8 | 9 | 10 | 11 | 12 |
| 6.4 | 2.5 | 3 | 3 | 3 | 3.5 | 3.5 | 3.5 | 4 | 4.5 | 5 | 6 | 7 | 8 | 9 | 11 | 12 | 13 | 14 | 16 | 18 |
| 10.0 | 3 | 3 | 3.5 | 3.5 | 4 | 4 | 4.5 | 5 | 6 | 7 | 8 | 9 | 11 | 13 | 15 | 17 | 19 |
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| 16.0 | 3.5 | 3.5 | 4 | 4.5 | 5 | 5 | 6 | 7 | 8 | 9 | 11 | 12 | 16 | 19 | 22 | 25 | 28 |
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| 20.0 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 7 | 8 | 9 | 11 | 13 | 15 | 19 | 24 | 26 | 30 |
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二、无缝不锈钢管压力及壁厚表 单位:mm 材料 | PN MPa | DN | 10 | 15 | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 | 1Cr18Ni9Ti 含Mo不锈钢 | ≤1.0 | 2 | 2 | 2 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 3 | 3 | 3.5 | 3.5 | 3.5 | 4 | 4 | 4.5 |
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| 1.6 | 2 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 3 | 3 | 3 | 3 | 3 | 3.5 | 3.5 | 4 | 4.5 | 5 | 5 |
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| 2.5 | 2 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 3 | 3 | 3 | 3.5 | 3.5 | 4 | 4.5 | 5 | 6 | 6 | 7 |
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| 4.0 | 2 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 3 | 3 | 3.5 | 4 | 4.5 | 5 | 6 | 7 | 8 | 9 | 10 |
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| 6.4 | 2.5 | 2.5 | 2.5 | 3 | 3 | 3 | 3.5 | 4 | 4.5 | 5 | 6 | 7 | 8 | 10 | 11 | 13 | 14 |
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| 4.0T | 3 | 3.5 | 3.5 | 4 | 4 | 4 | 4.5 |
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三、焊接钢管压力及壁厚表 单位:mm 材料 | PN MPa | DN | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 | 700 | 800 | 900 | 1000 | 1100 | 1200 | 1400 | 1600 | 焊接碳钢管 (Q235/A20) | 0.25 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 0.6 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 9 | 10 | 1.0 | 5 | 5 | 6 | 6 | 6 | 7 | 7 | 8 | 8 | 9 | 9 | 10 | 11 | 11 | 12 |
| 1.6 | 6 | 6 | 7 | 7 | 8 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
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| 2.5 | 7 | 8 | 9 | 9 | 10 | 11 | 12 | 13 | 15 | 16 |
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| 焊接不锈钢管 304 | 0.25 | 3 | 3 | 3 | 3 | 3.5 | 3.5 | 3.5 | 4 | 4 | 4 | 4.5 | 4.5 |
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| 0.6 | 3 | 3 | 3.5 | 3.5 | 3.5 | 4 | 4 | 4.5 | 5 | 5 | 6 | 6 |
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| 1.0 | 3.5 | 3.5 | 4 | 4.5 | 4.5 | 5 | 5.5 | 6 | 7 | 7 | 8 |
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| 1.6 | 4 | 4.5 | 5 | 6 | 6 | 7 | 7 | 8 | 9 | 10 |
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| 2.5 | 5 | 6 | 7 | 8 | 9 | 9 | 10 | 12 | 13 | 15 |
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四、根据压力计算钢管 管道的选用壁厚的计算器:
这是一个EXCEL的计算程序,填入相关的数据,就可以自动计算出选用钢管的厚度,非常方便。
目前只做了3个钢号:分别是 20#钢,15CrMo,0Cr18Ni10Ti 其它钢号有需要的可以给我们留言. 下载网址: 根据压力计算钢管管道的壁厚(管道工程选管利器)
五、管道承压计算公式:
下载网址: 根据压力计算钢管管道的壁厚(管道工程选管利器)
关于无缝钢管壁厚等级(如Sch80、Sch40)与承受压力之间的关系
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