低温用Q345B无缝钢管的外径尺寸及公称通径
|
公称外径D
|
壁厚S／mm
|
|
4.0
|
4.5
|
5.0
|
5.5
|
6.0
|
7.0
|
8.0
|
10.0
|
11.0
|
12.0
|
|
(in)
|
|
理论质量／(kg／m)
|
|
(6 5/8)
|
168.3
|
16.21
|
18.18
|
20.13
|
22.08
|
24.01
|
|
|
|
|
|
|
(7)
|
177.8
|
17.14
|
19.23
|
21.30
|
23.37
|
25.42
|
|
|
|
|
|
|
(7 5/8)
|
193.7
|
18.71
|
20.10
|
23.27
|
25.52
|
27.80
|
|
|
|
|
|
|
(8 5/8)
|
219.1
|
21.22
|
23.81
|
26.40
|
28.97
|
31.53
|
36.61
|
41.63
|
51.56
|
|
|
|
(9 /8)
|
244.5
|
23.72
|
26.63
|
29.53
|
32.42
|
35.29
|
41.00
|
46.66
|
57.83
|
|
|
|
(10 3/4)
|
273
|
|
|
33.04
|
26.28
|
39.51
|
45.92
|
52.28
|
64.86
|
|
|
|
(12 3/4)
|
323.9
|
|
|
39.32
|
43.19
|
47.04
|
54.70
|
62.32
|
77.4l
|
84.88
|
92.30
|
|
(14)
|
355.6
|
|
|
|
47.48
|
51.73
|
60.18
|
68.57
|
85.22
|
93.48
|
101.7
|
|
(16)
|
406.4
|
|
|
|
54.37
|
59.24
|
68.94
|
78.59
|
97.75
|
107.3
|
116.7
|
|
(18)
|
457.2
|
|
|
|
6l。26
|
66.76
|
77.71
|
88.62
|
110.3
|
121.4
|
131.7
|
|
(20)
|
508
|
|
|
|
68.15
|
74.28
|
86.48
|
98.64
|
122.8
|
134.8
|
146.8
|
注：1.根据需方要求，并经供需双方协议，可供应介于表中所列外径和壁厚之间尺 寸的钢管。
2.钢管外径的允许偏差不得超过±0.8％D。
3.钢管壁厚允许偏差不得超过±12.5％S。
4.钢管的通常长度为6—12m。
5.钢管的定尺长度应在通常长度范围内，其允许偏差为+20mm。+ 0mm
6.钢管的弯曲度不得大于钢管全长的0.15％。
