This standard replaces JB 87-59. This standard specifies the type, size and technical requirements for asbestos rubber gaskets for steel pipe flanges. This standard is applicable to asbestos rubber gaskets for steel pipe flanges with nominal pressures PN of 0.25~6.3MPa and sealing surface types of convex, concave and convex, and tongue and groove surfaces specified in JB/T 79~86. JB/T 87-1994 Asbestos rubber gasket for pipe flanges JB/T87-1994 Standard download and decompression password: www.bzxz.net

J15 | | tt | | JB | Ministry of Industry
Issued
Implemented on 1995-10-01
Machinery Industry Standard of the People's Republic of China
Asbestos Rubber Gaskets for Pipe Flanges
1 Subject content and scope of application
This standard specifies the type, size and technical requirements of asbestos rubber gaskets for steel pipe flanges. JB/T87-94
JB87-59
This standard is applicable to the nominal pressure PN specified in JB/T79~86 is 0.25~6.3MPa, the sealing surface type is convex surface, concave and convex surface, Use asbestos rubber gaskets for steel pipe flanges on the groove surface. Reference standards
2
GB539
GB/T1804
GB3985
GB9129
Oil-resistant asbestos rubber sheet
General tolerance Unspecified tolerances for linear dimensions
Asbestos rubber sheets
Asbestos rubber gaskets for steel pipe flanges Technical conditions 3 Types and dimensions of gaskets
Asbestos rubber for raised pipe flanges The type and size of the gasket are as specified in Figure 1 and Table 1. 3.1
2888
Figure 1
Approved by the Ministry of Machinery Industry on 1994-12-09
92
Implemented on 1995-10-01
Nominal diameter
DN
10
15
20
25
32
40
50
65
80
100
125
150
175
200
225| |tt||250
300
350
400
450
500
600
-700|| tt||800
900
1000
1200
1400
1500
1600
Gasket inner diameter|| tt||d
14
18
25
32
38
45
57||tt| |76
89
108
133
159
194
219
245
273
325
377
426
480
530
630
720
820|| tt||920
1020
1220
1420
1520
1620
0.25
38||tt| |43
53
63
76
86
96
116
132
152
182
207
237
262
287
317
372
422|| tt||472
527
577
680
785
890
990
1090||tt| |1286
1486
1596
1696
0. 6
38
43
53||tt| |63
76
86
96
116
132
152
182
207
237
262
287
317
372
422
472
527|| tt||577
6.80
785
890
990
1090
1306
1526||tt| |1626
1726
JB/T 8794
Table 1
Nominal pressure
Force
1.0
Gasket
46
51
61
71
82
92
107
127|| tt||142
162
192
217
247
272
302
327||tt| |377
437
490
540
596
695
810
916
1016
1126
1339
1549
1766
Outer
PNMPa
1.6
Diameter D.
46
S1
61
71
82
92
107
127|| tt||142
162
192
217
247
272
302
330||tt| |385
445
495
555
616
729
799
909
1009
1122
1336
1536
-
1762
2.5
46
51|| tt||61
71
82
92
107
127
142
167||tt| |195
225
255
285
310
340
400
456
516
566
619
729
827
942
1036
1152
1362|| tt||1575
-
3.2 The type and size of asbestos rubber sight sheets for concave and convex pipe flanges shall be as specified in Figure 2 and Table 2. 4.0
46
51
61
71
82
92
107
127| |tt||142
167
195
225
265
290
321
351||tt ||416
476
544
569
622
741
846
972
mm. ||10
15
20
25
32
40
50
65
80
100
125
150
175
200
225
250
300| |tt||350
400
450
500
600
700
800
900||tt ||1000
JB/T 87-94
d
D
图2
表2
公称医力PNMPa| |tt||2.5,4.0, 6.3
迷片内很d
14
18
25
32
38|| tt||45
57
76
89
108
133
159
194||tt| |219
245
273
325
377
4.26
480
530
630
720
820
920
1020
迷片外很D
34
39||tt| |50
57
65
75
87
109
120
149
175
203
233
259
286
312
363
421
473|| tt||523
575
675/677
777/767
882/875
连电视频：
2| |tt||3
mm
JB/T87-94
3.3摔水面管红色用石棉红色连的型式和包装按图3及表3的名记。网
公称通很
DN
10
15
20
25
32||tt| |40
50
65
80
100
125
150
175
200 bzxz.net
225
250
300
350
400
450
500
600|| tt||700
800
4 technology requirements
整片内很d
24
29
36
43
51
61
73
95
106
129
155
183| |tt||213
239
266
292
343
395
447
497||tt ||549
649/651
751/741
856/849
d
D
图3||tt| |表3
网
公称情动PNMPa
2.5, +.0, 6.3
整片外很D，
34||tt| |39
50
57
65
75
87
109
120
149
175
203
233
259
286
312
363
421|| tt||473
523
575
675/677
777/767
882/875
助片厚库| |tt||2
mm
4.1 连示材料应可以可以GB3985和GB539中可以板材。其电影性上与情动范国应可以使用电影电视车95
JB/T 87-94. /T1804中国C级（粉紛级）.4.3尤凫面和禅混面管红用石棉红色连线的最作的可表的这些的运动。表4
迷连内远分远可以进行| |tt||+1. 0
0
敏片外很 D。 歌进外场
0
-1.0
4.4拃的红天的外场外士的士0.20mm， The thickness of the same piece of film is not greater than 0.20mm.mm
4.5 The surface of the piece is 关整、无麵曲 deformation、不可以有鲍睡、裂紻、气泡、外来来质可可以可以下载下载的defects, edge运动应整齐。
5 真手在线
公称通进100mm，公称情动2.5MPa的得面型管红用石棉红杯择烤的线：公面用石棉红杯红板100—25JB/T87- 94 additional description：
本标准由添动工业部添加工业化研究是是。本标准由添加工业部机被机标化研究、北京华光安全件厂起草，本标准起草人幸英、叶宝龙、季新华。96
26
480
530
630
720
820
920
1020
连片外很D
34
39
50
57
65
75
87
109
120
149
175
203
233
259
286
312| |tt||363
421
473
523
575
675/677
777/767
882/875
连生结果：
2
3
mm
JB/T87-94
3.3摔混面管蓝用石极通连的剧的型式和化学按图3及表3的设计。网
公称通很
DN
10
15||tt ||20
25
32
40
50
65
80
100
125
150
175
200
225
250
300
350
400| |tt||450
500
600
700
800
4 technology requirements
整片内很d||tt| |24
29
36
43
51
61
73
95
106
129
155
183
213
239
266
292
343|| tt||395
447
497
549
649/651
751/741
856/849||tt| |d
D
图3
表3
网
公称情利PNMPa
2.5, +.0, 6.3|| tt||整片外很D，
34
39
50
57
65
75
87
109
120
149
175
203
233
259
286| |tt||312
363
421
473
523
575
675/677
777/ 767
882/875
助片厚库
2
mm
4.1 迷礼板材合可以GB3985和GB539中结果板材。其电影水水与情动范国应可以使用于电影电影95
JB/T 87-94
定。 其电影电影金属、心合松连燕和结合成水至应可以GB9129的名称。 4.2凸面The limit deviation of the size of the inner diameter and outer diameter of the pipe is C grade (粉紛级). 4.3表4的设计。表4
松片内迈d 歌行自电
+1. 0
0
敏片外很 D。 歌进外场
0
-1.0
4.4拃的红天的外场外士的士0.20mm， The thickness of the same piece of film is not greater than 0.20mm.mm
4.5 The surface of the piece is 关整、无麵曲 deformation、不可以有鲍睡、裂紻、气泡、外来来质可可以可以下载下载的defects, edge运动应整齐。
5 真手在线
公称通进100mm，公称情动2.5MPa的得面型管红用石棉红杯择烤的线：公面用石棉红杯红板100—25JB/T87- 94 additional description：
本标准由添加工业工业部深圳工业化研究是是是。本标准由添加工业部机被深圳化研究、北京华光工业件厂起草，本标准起草人幸英、叶宝龙、季新华。96
26
480
530
630
720
820
920
1020
连片外很D
34
39
50
57
65
75
87
109
120
149
175
203
233
259
286
312| |tt||363
421
473
523
575
675/677
777/767
882/875
连生结果：
2
3
mm
JB/T87-94
3.3摔混面管蓝用石极通连的剧的型式和化学按图3及表3的设计。网
公称通很
DN
10
15||tt ||20
25
32
40
50
65
80
100
125
150
175
200
225
250
300
350
400| |tt||450
500
600
700
800
4 technology requirements
整片内很d||tt| |24
29
36
43
51
61
73
95
106
129
155
183
213
239
266
292
343|| tt||395
447
497
549
649/651
751/741
856/849||tt| |d
D
图3
表3
网
公称情利PNMPa
2.5, +.0, 6.3|| tt||整片外很D，
34
39
50
57
65
75
87
109
120
149
175
203
233
259
286| |tt||312
363
421
473
523
575
675/677
777/ 767
882/875
助片厚库
2
mm
4.1 迷礼板材合可以GB3985和GB539中结果板材。其电影水水与情动范国应可以使用于电影电影95
JB/T 87-94
定。 其电影电影金属、心合松连燕和结合成水至应可以GB9129的名称。 4.2凸面The limit deviation of the size of the inner diameter and outer diameter of the pipe is C grade (粉紛级). 4.3表4的设计。表4
松片内迈d 歌行自电
+1. 0
0
敏片外很 D。 歌进外场
0
-1.0
4.4拃的红天的外在外士的士0.20mm， The thickness of the same piece of film is not greater than 0.20mm.mm
4.5 The surface of the piece is 关整、无麵曲 deformation、不可以有鲍睡、裂紻、气泡、外来来质可可以可以下载下载的defects, edge运动应整齐。
5 真手在线
公称通进100mm，公称情动2.5MPa的得面型管红用石棉红杯择烤的线：公面用石棉红杯红板100—25JB/T87- 94 additional description：
本标准由添加工业工业部深圳工业化研究是是是。本标准由添加工业部机被深圳化研究、北京华光工业件厂起草，本标准起草人幸英、叶宝龙、季新华。96
20mm, the thickness difference of the same piece should not be greater than 0.20mm. mm
4.5 The surface of the gasket should be smooth and without surface deformation. No lumps, cracks, bubbles, foreign impurities and other defects that may affect use are allowed. The edges should be cut neatly. || tt |
This standard is proposed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Machinery Quilt Standardization Research Institute of the Ministry of Machinery Industry and Beijing Huaguang Seals Factory. The drafters of this standard are Xing Ying, Ye Baolong and Ji Xinhua. 96
20mm, the thickness difference of the same piece should not be greater than 0.20mm. mm
4.5 The surface of the gasket should be smooth and without surface deformation. No lumps, cracks, bubbles, foreign impurities and other defects that may affect use are allowed. The edges should be cut neatly. || tt |
This standard is proposed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Machinery Quilt Standardization Research Institute of the Ministry of Machinery Industry and Beijing Huaguang Seals Factory. The drafters of this standard are Xing Ying, Ye Baolong and Ji Xinhua. 96
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