钢制管法兰用带外环型缠绕式垫片 (摘自GB/T 4622.2—1988) (mm)
|
|
|
公称
通径
DN
|
公 称 压 力 PN／MPa
|
T1, D4max
|
T
|
|
2.0
|
2.5，4.0
|
2.5
|
4.0
|
5.0，10.0，
15.0，25.0
|
5.0
|
10.0
|
15.0
|
25.0
|
|
D2min
|
D3max
|
D4max
|
D2min
|
D3max
|
D4max
|
D4max
|
D2max
|
D3max
|
D4max
|
D4max
|
D4max
|
D4max
|
|
10
|
|
|
|
23.6
|
36.4
|
48
|
按PN2.5
|
|
|
|
按PN5.0
|
|
按PN15
|
2和3
|
3.2和4.5
|
|
15
|
18.7
|
32.4
|
46.5
|
27.6
|
40.4
|
53
|
18.7
|
32.1
|
52.5
|
62.5
|
|
20
|
26.6
|
40.1
|
56.0
|
33.6
|
47.4
|
63
|
25.0
|
40.0
|
64.5
|
69.0
|
|
25
|
32.9
|
48.0
|
65.5
|
40.6
|
55.4
|
73
|
31.4
|
48.9
|
71.0
|
77.5
|
|
32
|
45.6
|
60.9
|
75.0
|
49.6
|
66.4
|
84
|
44.1
|
60.5
|
80.5
|
87.0
|
|
40
|
53.6
|
70.4
|
84.5
|
55.6
|
72.4
|
94
|
50.4
|
70.1
|
94.5
|
97.0
|
|
50
|
69.5
|
86.1
|
102.5
|
67.6
|
86.4
|
109
|
66.3
|
86.9
|
109.0
|
141.0
|
|
65
|
82.2
|
98.9
|
121.5
|
83.6
|
103.4
|
129
|
79.0
|
98.9
|
129.0
|
163.5
|
|
80
|
101.2
|
121.1
|
134.5
|
96.6
|
117.4
|
144
|
94.9
|
121.1
|
148.5
|
166.5
|
173.0
|
|
100
|
126.6
|
149.6
|
172.5
|
122.6
|
144.1
|
170
|
120.3
|
149.6
|
180.0
|
192
|
205.0
|
208.5
|
|
125
|
153.6
|
178.4
|
196.0
|
147.6
|
170.1
|
196
|
147.2
|
178.5
|
215.0
|
240
|
246.5
|
253.0
|
|
150
|
180.6
|
210.0
|
221.5
|
176.6
|
200.4
|
226
|
174.2
|
210.0
|
250.0
|
265
|
287.5
|
281.5
|
|
200
|
231.4
|
263.9
|
278.5
|
228.6
|
255.4
|
286
|
293
|
225.0
|
263.9
|
306.0
|
319
|
357.5
|
351.5
|
|
250
|
286.9
|
317.9
|
338.0
|
282.6
|
310.4
|
343
|
355
|
280.6
|
317.9
|
360.5
|
399
|
434.0
|
434.5
|
|
300
|
339.3
|
375.1
|
408.0
|
331.6
|
360.4
|
403
|
420
|
333.0
|
375.1
|
421.0
|
456
|
497.5
|
519.5
|
|
350
|
371.1
|
406.8
|
449.0
|
374.6
|
405.4
|
460
|
477
|
364.7
|
406.8
|
484.5
|
491
|
520.0
|
579.0
|
|
400
|
421.9
|
464.0
|
513.0
|
425.6
|
458.4
|
517
|
549
|
415.5
|
464.0
|
538.5
|
564
|
574.0
|
641.0
|
|
450
|
475.9
|
527.5
|
548.0
|
476.6
|
512.4
|
567
|
574
|
469.5
|
527.5
|
595.5
|
612
|
638.0
|
702.5
|
3和5
|
4.5和6.5
|
|
500
|
526.7
|
578.3
|
605.0
|
527.6
|
566.4
|
627
|
631
|
520.3
|
578.3
|
653.0
|
682
|
697.5
|
756.0
|
|
600
|
631.4
|
686.2
|
716.5
|
634.6
|
675.4
|
734
|
750
|
625.1
|
686.2
|
774.0
|
790
|
837.5
|
900.5
|
|
700
|
|
734.0
|
778.5
|
836
|
|
|
|
800
|
835.0
|
879.5
|
945
|
|
900
|
933.0
|
980.5
|
1 045
|
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。
