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螺纹三通在制作工艺中分为锻制和铸造两种,锻制是指用钢锭或圆棒加热锻打成型后,上车床加工螺纹后而成,铸造是指将钢锭熔化后倒入三通的模型后,待其冷却后而成。因为制造工艺的不同,其承受压力的大小也不同,锻制的耐压要远高于铸造的。
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弯头,三通,四通参数表:
|
公称通径 Nominal Diameter
|
中心至端面 Center to End
|
外径Outside Diameter D
|
壁厚Wall Thickness
|
螺纹长度Length of Thread
|
A
|
D
|
Cmin
|
弯头、三通、四通Elbow、Tee、Cross
|
45°弯头45°Elbow
|
DN
|
NPS
|
2000LB
|
3000LB
|
6000LB
|
2000LB
|
3000LB
|
6000LB
|
2000LB
|
3000LB
|
6000LB
|
2000LB
|
3000LB
|
6000LB
|
NPT
|
Rc
|
Sch80
|
Sch160
|
XXS
|
Sch80
|
Sch160
|
XXS
|
Sch80
|
Sch160
|
XXS
|
Sch80
|
Sch160
|
XXS
|
6
|
1/8
|
21
|
21
|
25
|
17
|
17
|
19
|
22
|
22
|
25
|
3
|
3
|
6.5
|
6.5
|
6.5
|
8
|
1/4
|
21
|
25
|
29
|
17
|
19
|
22
|
22
|
25
|
33
|
3
|
3.5
|
6.5
|
8
|
10
|
10
|
3/8
|
25
|
29
|
33
|
19
|
22
|
25
|
25
|
33
|
38
|
3
|
3.5
|
7
|
9
|
10.5
|
15
|
1/2
|
29
|
33
|
38
|
22
|
25
|
29
|
33
|
38
|
46
|
3
|
4
|
8
|
11
|
13.5
|
20
|
3/4
|
33
|
38
|
44
|
25
|
29
|
33
|
38
|
46
|
56
|
3
|
4.5
|
8.5
|
12.5
|
14
|
25
|
1
|
38
|
44
|
51
|
29
|
33
|
35
|
46
|
56
|
62
|
3.5
|
5
|
10
|
14.5
|
17.5
|
32
|
1.1/4
|
44
|
51
|
60
|
33
|
35
|
43
|
56
|
62
|
75
|
4
|
5.5
|
10.5
|
17
|
18
|
40
|
1.1/2
|
51
|
60
|
64
|
35
|
43
|
44
|
62
|
75
|
84
|
4
|
5.5
|
11
|
18
|
18.5
|
50
|
2
|
60
|
64
|
83
|
43
|
45
|
52
|
75
|
84
|
102
|
4.5
|
7
|
12
|
19
|
19
|
65
|
2.1/2
|
76
|
83
|
95
|
52
|
52
|
64
|
92
|
102
|
121
|
5.5
|
7.5
|
15.5
|
23.5
|
29
|
80
|
3
|
86
|
96
|
106
|
64
|
64
|
79
|
110
|
121
|
146
|
6
|
9
|
16.5
|
26
|
30
|
100
|
4
|
106
|
114
|
114
|
79
|
79
|
79
|
146
|
152
|
152
|
6.5
|
11
|
18.5
|
27.5
|
33
|
|
上述尺寸符合GB/T14626、ANSI B16.11、BSP3799标准
Above dimensions acc.to the standard of GB/T14626、ANSI B16.11、BS3799
备注(note):客户定货时需注明螺纹型号
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