钢制管法兰用带内环型、基本型缠绕式垫片 (摘自GB/T 4622.2—1988)(mm)
|
公称通径DN
|
基本型
|
带内环型
|
公称压力PN/MPa
|
公称压力PN/MPa
|
T1
|
T
|
2.5,4.0
|
5.0,10.0,15.0,25.0
|
2.5,4.0
|
5.0,10.0,15.0,25.0
|
D2min
|
D3max
|
T
|
D2min
|
D3max
|
T
|
D1min
|
D2min
|
D3max
|
D1min
|
D2min
|
D3max
|
10
|
|
|
|
|
|
4.5
|
15
|
23.6
|
36.4
|
|
|
|
2及3
|
3.2及4.5
|
15
|
24.5
|
36
|
19
|
27.6
|
40.4
|
14.3
|
18.7
|
32.4
|
20
|
32.5
|
44
|
24
|
33.6
|
47.4
|
20.6
|
25
|
40.1
|
25
|
37
|
52
|
30
|
40.6
|
55.4
|
27
|
31.4
|
48
|
32
|
46.5
|
64.5
|
39
|
49.6
|
66.4
|
34.9
|
44.1
|
60.9
|
40
|
53
|
74
|
45
|
55.6
|
72.4
|
41.3
|
50.4
|
70.4
|
50
|
72
|
93
|
56
|
67.6
|
86.4
|
52.4
|
66.3
|
86.1
|
60
|
84.5
|
106
|
72
|
83.6
|
103.4
|
63.5
|
79
|
98.9
|
80
|
107
|
128
|
84
|
96.6
|
117.4
|
77.8
|
94.9
|
121.1
|
100
|
128.5
|
149.5
|
3.2
|
131
|
158.5
|
108
|
122.6
|
144.4
|
103
|
120.3
|
149.6
|
125
|
154.5
|
175.5
|
159.5
|
187
|
133
|
147.6
|
170.4
|
128.5
|
147.2
|
178.4
|
150
|
182.5
|
203.5
|
189.5
|
217
|
160
|
176.6
|
200.4
|
154
|
174.2
|
210
|
200
|
238.5
|
259.5
|
237
|
271
|
209
|
228.6
|
255.4
|
203.2
|
225
|
263.9
|
250
|
291.5
|
312.5
|
285
|
325
|
262
|
282.6
|
310.4
|
254
|
280.6
|
317.9
|
3及5
|
4.5及6.5
|
300
|
342.5
|
363.5
|
342
|
382
|
311
|
331.6
|
360.4
|
354.2
|
333
|
375.1
|
350
|
394.5
|
421.5
|
373.5
|
414
|
355
|
374.6
|
405.4
|
303.2
|
364.7
|
406.8
|
400
|
445.5
|
473.5
|
424.5
|
471
|
406
|
425.6
|
458.4
|
342.9
|
415.5
|
464
|
450
|
496.5
|
523.5
|
488
|
534.5
|
452
|
476.6
|
512.4
|
444.5
|
469.5
|
527.5
|
500
|
548.5
|
575.5
|
532.5
|
585.5
|
508
|
527.6
|
566.4
|
495.3
|
520.3
|
578.3
|
600
|
648.5
|
675.5
|
640.5
|
693.5
|
610
|
634.6
|
675.4
|
595.9
|
625.1
|
686.2
|
700
|
750.5
|
777.5
|
4.5
|
|
|
|
710
|
734
|
778.5
|
|
800
|
855.5
|
882.5
|
811
|
835
|
879.5
|
900
|
960.5
|
987.5
|
909
|
933
|
980.5
|
1 000
|
1 060.5
|
1 093.5
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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注:国家标准没有规定垫片的适用温度范围.设计人员选用时,可参考中国石油化工总公司标准SHJ407—1989“管法兰用缠绕式垫片”规定:
不锈钢带和特制石棉带缠绕垫片:≤500°C;
不锈钢带和柔性石墨带缠绕垫片:≤600°C(非氧化介质≤800°C);
不锈钢带和聚四氟乙烯缠绕垫片:-200～260°C。
