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Tytp BL
Type JTB
Type TB
Type ZB
Type WDB
Type XHB
Type DHB
Type JB
Type WJB
Type NPB
Type QWP
Type ZPB
Type QPB
Type NTZ
Type WTZ
Type CYTB
Type GTB
Type TBM
Type TBG

External pressure Expansion Joints(Type WD B)

•  Product Features

     External pressure expansion joint contains one bellows connected to outer and inner tubes. the bellows is subjected to external pressure and has relatively more convolutions so that this kind of expansion joint can absorb considerably large axial movement.

•  Applicable Conditions

Working pressure: 0.1 through 2.5 (MPa)
Working temperature: -20 through 450 (℃)
Service life: 1000 (times)

Flange:GB、ANSI、JIS、DIN etc


• Product Specification

Nominal ID(DN): Φ50 through Φ600 (mm)


•  STRUCTURE

• Material

1.Bellow:Stainless steels 304 316L 321 254 309 Inconel625 31803 etc
2.Flange、weld Ends:Carbon steel Stainless steels etc
3.Tie rod Nuts:Carbon steel Stainless steels etc
 

 The product code consists of following elements 

•  Guides for expansion Joint installation

1. The expansion joint shall be installed according to the engineering drawing of pipe line and the expansion joint installations
2. In order to insure proper function of any expansion joints, it is necessary that all pipe lines in which expansion joints are located be suitably guided and anchored. The guides and anchors must be installed strictly in accordance to relevant technical documentation. Please refer to the “guideline for installation of Expansion Joints” about the principle of using guides and anchors.
3. Since the bellows used in expansion joints are made of thin stainless steel sheets, special attention shall be paid when transporting, handing and welding to avoid damage of bellows caused by dents, scores, arc strikes and weld spatters.
4. Any foreign laterals in the bellows and pipes shall be removed to ensure the proper function of expansion joints before installation.
5. If the flow direction is specified, be sure to install expansion joint with the proper orientation with the respect of flow direction arrow.
6. No movement of the expansion joint (such as axial compression or extension, lateral offset, or rotation) due to piping misalignment shall be imposed during installation so as to ensure proper function of the bellows.

 Date sheet
Date Sheet
PN
MPa
Product type
Nominal
Diameter

D
N(mm)

Bellows
effctive area A(CM2)

Convolution
number

n)

Overall
Length

L(
mm)

Axial
Movement

X(mm)

Axial
Spring rate

kX。
N/mm

Max
Diameter

B(mm)

End pipe
doxS
(mm)

0.6
6WDBl50 x 8—J
150
535
8
950
122
212
450
Φ159 x 4.5
6WDBl50 x 16—J
16
1540
244
106
6WDB200 x 8—J
200
779
8
950
120
247
505
Φ219 x 6
6WDB200 x 16—J
16
1550
240
124
6WDB250 x 8—J
250
1075
8
1080
154
220
566
Φ273 x 8
6WDB250 x 16—J
16
1800
308
110
6WDB300 x 8—J
300
1269
8
1090
153
245
600
Φ325 x 8
6WDB300 x 16—J
16
1820
306
123
6WDB350 x 8—J
350
1619
8
1090
151
271
655
Φ377 x 10
6WDB350 x 16—J
16
1820
302
136
6WDB400 x 8—J
400
2003
8
1110
149
299
710
Φ426 x 10
6WDB400 x 16—J
16
1840
298
150
6WDB450 x 8—J
450
2428
8
1110
146
326
768
Φ478 x 10
6WDB450 x 16—J
16
1840
292
163
6WDB500 x 6—J
500
3473
6
1475
159
540
975
Φ529 x 10
6WDB500 x 12—J
12
2405
318
270
6WDB600 x 6—J
600
4766
6
1540
160
530
1090
Φ630 x 10
6WDB600 x 12—J
12
2540
320
265
6WDB700 x 6—J
700
6068
6
1540
159
594
1190
Φ720 x 10
6WDB700 x 12—J
12
2540
318
297
6WDB800 x 6—J
800
7528
6
1540
157
688
1290
Φ820 x 10
6WDB800 x 12—J
12
2540
314
344
6WDB900 x 6—J
900
9328
6
1605
198
479
1460
Φ920 x 10
6WDB900 x 12—J
12
2685
396
240
6WDB1000 x 6—J
1000
11118
6
1605
196
517
1560
Φ1020 x 10
6WDB1000 x 12—J
12
2685
392
259
1.0
10WDBl50 x 8—J
150
538
8
950
100
348
450
Φ159 x 4.5
10WDBl50 x 16—J
16
1540
200
174
10WDB200 x 8—J
200
783
8
950
97
421
505
Φ219 x 6
10WDB200 x 16—J
16
1550
194
211
10WDB250 x 8—J
250
1080
8
1080
126
359
566
Φ273 x 9
10WDB250 x 16—J
16
1800
252
180
10WDB300 x 8—J
300
1274
8
1090
124
407
600
Φ325 x g
10WDB300 x 16—J
16
1820
248
204
10WDB350 x 8—J
350
1625
8
1090
121
454
655
Φ377 x 10
10WDB350 x 16—J
16
1820
242
227
10WDB400 x 8—J
400
2009
8
1110
119
503
710
Φ426 x 10
10WDB400 x 16—J
16
1840
238
252
10WDB450 x 8—J
450
2435
8
1110
116
551
768
Φ478 x 10
10WDB450 x 16—J
16
1840
232
276
10WDBK500 x 6—J
500
3473
6
1475
146
1151
860
Φ529 x 10
10WDBK500 x 12—J
12
2405
292
575
10WDBK600 x 6—J
600
4766
6
1540
141
1527
975
Φ630 x 10
10WDBK600 x 12—J
12
2540
282
764
10WDBK700 x 6—J
700
6068
6
1540
147
1601
1075
Φ720 x 10
10WDBK700 x 12—J
12
2540
294
800
10WDBK800 x 6—J
800
7528
6
1540
148
1689
1175
Φ820 x 10
10WDBK800 x 12—J
12
2540
296
845
10WDBK900 x 6—J
900
9348
6
1605
223
1335
1460
Φ920 x 10
10WDBK900 x 12—J
12
2685
446
667
10WDBKl000 x 6—J
1000
11141
6
1605
223
1415
1560
Φ1020 x 10
10WDBKl000 x 12—J
12
2685
446
707
1.6
16WDBl50 x 8—J
150
538
8
950
78
660
450
Φ159 x 4.5
16WDBl50 x 16—J
16
1540
156
330
16WDB200 x 8—J
200
783
8
950
75
809
505
Φ219 x 6
16WDB200 x 16—J
16
1550
150
405
16WDB250 x 9—J
250
1080
8
1080
98
678
566
Φ273 x 9
16WDB250 x 16—J
16
1800
196
339
16WDB300 x 9—J
300
1274
8
1090
96
738
600
Φ325 x 9
16WDB300 x 16—J
16
1820
192
369
16WDB350 x 8—J
350
1625
8
1090
94
837
655
Φ377 x 10
16WDB350 x 16—J
16
1820
188
418
16WDB400 x 8—J
400
2009
8
1110
91
934
710
Φ426 x 10
16WDB400 x 16—J
16
1840
182
467
16WDB450 x 8—J
450
2435
8
1110
90
1031
768
Φ478 x 10
16WDB450 x 16—J
16
1840
180
516
16WDBK500 x 6—J
500
3473
6
1475
140
1172
860
Φ529 x 10
16WDBK500 x 12一J
12
2405
280
586
16WDBK600 x 6一J
600
4766
6
1540
136
1560
975
Φ630 x 10
16WDBK600 x 12—J
12
2540
272
780
16WDBK700 x 6—J
700
6068
6
1540
141
1635
1075
Φ720 x 10
16WDBK700 x 12—J
12
2540
282
817
16WDBK800 x 6—J
800
7528
6
1540
142
1725
1175
Φ820 x 10
16WDBK800 x 12一J
12
2540
284
863
16WDBK900 x 6一J
900
9348
6
1605
214
1357
1460
Φ920 x 10
16WDBK900 x 12—J
12
2685
428
678
16WDBKl000 x 6—J
1000
11141
6
1605
214
1438
1560
Φ1020 x 10
16WDBKl000 x 12—J
12
2685
428
719

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