| 详细介绍： 聊城市博润钢管专业生产经营φ10- 1200mm无缝钢管、φ10-2820mm直缝钢管。联系人:汪坤15069510010 www.gangguan169.com 钢管的承压问题一直是困扰广大钢管从业人员的细节性问题，每个人都能通过钢管压力壁厚对照表来比对钢管的承压能力，但具体到某一根钢管上来讲，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。如果在我们测算出钢管的外径、壁厚、钢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，它是要根据钢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）无缝钢管压力壁厚对照表
材质
|
PN
MPa
|
DN
|
10
|
15
|
20
|
25
|
32
|
40
|
50
|
65
|
80
|
100
|
125
|
150
|
200
|
250
|
300
|
350
|
400
|
450
|
500
|
600
|
|
20#
|
≤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
|
|
|
|
|
16.0
|
4
|
4.5
|
5
|
5
|
6
|
6
|
7
|
8
|
9
|
11
|
13
|
15
|
19
|
24
|
26
|
30
|
34
|
|
|
|
|
20.0
|
4
|
4.5
|
5
|
6
|
6
|
7
|
8
|
9
|
11
|
13
|
15
|
18
|
22
|
28
|
32
|
36
|
|
|
|
|
|
4.0T
|
3.5
|
4
|
4
|
4.5
|
5
|
5
|
5.5
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
10#
|
≤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
|
|
|
|
|
16.0
|
4
|
4.5
|
5
|
5
|
6
|
7
|
8
|
9
|
10
|
12
|
15
|
18
|
22
|
28
|
32
|
36
|
40
|
|
|
|
|
20.0
|
4
|
4.5
|
5
|
6
|
7
|
8
|
9
|
11
|
12
|
15
|
18
|
22
|
26
|
34
|
38
|
|
|
|
|
|
|
4.0T
|
3.5
|
4
|
4
|
4.5
|
5
|
5
|
5.5
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
16Mn
|
≤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
|
|
|
|
|
16.0
|
3.5
|
3.5
|
4
|
4.5
|
5
|
5
|
6
|
7
|
8
|
9
|
11
|
12
|
16
|
19
|
22
|
25
|
28
|
|
|
|
|
20.0
|
3.5
|
4
|
4.5
|
5
|
5.5
|
6
|
7
|
8
|
9
|
11
|
13
|
15
|
19
|
24
|
26
|
30
|
|
|
|
|
|
（二）直缝焊管承受压力表
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
（Q235A20）
|
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
|
|
|
2.5
|
7
|
8
|
9
|
9
|
10
|
11
|
12
|
13
|
15
|
16
|
|
|
|
|
|
|
焊接不锈钢管
|
0.25
|
3
|
3
|
3
|
3
|
3.5
|
3.5
|
3.5
|
4
|
4
|
4
|
4.5
|
4.5
|
|
|
|
|
0.6
|
3
|
3
|
3.5
|
3.5
|
3.5
|
4
|
4
|
4.5
|
5
|
5
|
6
|
6
|
|
|
|
|
1.0
|
3.5
|
3.5
|
4
|
4.5
|
4.5
|
5
|
5.5
|
6
|
7
|
7
|
8
|
|
|
|
|
|
1.6
|
4
|
4.5
|
5
|
6
|
6
|
7
|
7
|
8
|
9
|
10
|
|
|
|
|
|
|
2.5
|
5
|
6
|
7
|
8
|
9
|
9
|
10
|
12
|
13
|
15
|
|
|
|
|
|
|
更多钢管知识尽在www.gangguan169.com http://www.gangguan169.com/zhishi/
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