Product Introduction
JDZ type axial inward pressure corrugated compensator is also commonly known as shock-absorbing corrugated compensator, corrugated pipe, expansion joint, or expansion joint. It is composed of corrugated pipes (a type of elastic element) and accessories such as end pipes, brackets, flanges, and conduits that make up its working body. Axial inward pressure corrugated compensator belongs to a type of compensation component. The JDZ type axial inward pressure corrugated compensator is mainly used to compensate for axial displacement and has the ability to compensate for angular displacement, but it is generally not used to compensate for angular displacement.
Product advantages
This product utilizes the effective expansion and contraction deformation of its working body corrugated tube to absorb dimensional changes caused by thermal expansion and contraction in pipelines, conduits, containers, etc., or compensate for axial, lateral, and angular displacements of pipelines, conduits, containers, etc. The JDZ type axial inward pressure corrugated compensator uses its main elastic element, the expansion and displacement of the corrugated pipe, to compensate for the displacement of the pipeline route. It has a large compensation amount and good elasticity. The product is suitable for transporting media such as seawater, fresh water, hot and cold water, drinking water, domestic sewage, crude oil, fuel oil, lubricating oil, finished oil, air, gas, etc.
1. Compensate for axial, transverse, and angular thermal deformation of the absorption pipeline.
2. The expansion and contraction of the corrugated compensator facilitates the installation and disassembly of valve pipelines.
3. Absorb equipment vibration and reduce the impact of equipment vibration on pipelines.
4. Absorb the deformation of pipelines caused by earthquakes and subsidence.
Product Features
Calculation of Support Force for JDZ Internal Pressure Ripple Compensator:
Internal pressure thrust: F=100 · P · A Axial elasticity: Fx=Kx · (f · X)
Lateral elasticity: Fy=Ky · Y Bending moment: My=Fy · L
Bending moment: M θ=K θ ·θ Composite bending moment: M=My+M θ
In the formula: Kx: axial stiffness N/mm X: actual axial displacement mm
Ky: Lateral stiffness N/mm Y: Actual lateral displacement mm
K θ: angular stiffness N · m/degree θ: actual displacement measurement in the angular direction
P: Working pressure MPa A: effective area of corrugated pipe cm2 (check sample)
L: Distance m from the midpoint of the compensator to the support
Application example of JDZ type axial inward pressure corrugated compensator:
A certain carbon steel pipeline with a nominal diameter of 500mm, a working pressure of 0.6MPa, a medium temperature of 300 ° C, and an ambient minimum temperature of -10 ° C. The installation temperature of the compensator is 20 ° C. According to the pipeline layout (as shown in the figure), an internal pressure corrugated compensator needs to be installed to compensate for axial displacement X=32mm, lateral displacement Y=2.8mm, and angular displacement θ=1.8 degrees. Given L=4m, the number of fatigue failures of the compensator is considered to be 15000 times, and the force on support A is calculated.
classic case
Product schematic diagram

Component materials
number | name | quantity |
1 | corrugated tube | 1 |
2 | pipe nipple | 2 |
3 | draft tube | 1 |
4 | bolt | n |
5 | nut | 4n |
Technical Parameter
Diameter DN | Number of waves | Pressure grade Mpa | Effective area of bellows c ㎡ | Max size of external diameter mm | Length Length | |||||
0.25 | 0.6 | 1.0 | 1.6 | 2.5 | Flange JDZ/F (mm) | Take over the connection tube JDZ/F (mm) | ||||
Axial compensation mm, f911 degrees N/ram | ||||||||||
32 | 8 | 25/21 | 22/26 | 20/26 | 18/63 | 15/98 | 16 | 110 | 160/250 | 264/210 |
16 | 50/11 | 46/14 | 41/14 | 36/32 | 31/47 | 220 | 224/291 | 316/320 | ||
40 | 8 | 25/28 | 22/44 | 20/44 | 18/89 | 15/106 | 23 | 130 | 164/259 | 269/260 |
16 | 50/14 | 46/22 | 41/22 | 36/45 | 31/55 | 240 | 230/304 | 319/400 | ||
50 | 8 | 25/30 | 22/51 | 20/70 | 18/70 | 15/138 | 37 | 150 | 172/276 | 282/230 |
16 | 50/16 | 46/26 | 41/35 | 36/35 | 31/70 | 260 | 240/342 | 347/450 | ||
65 | 8 | 33/28 | 30/35 | 26/44 | 22/55 | 19/68 | 55 | 170 | 315/294 | 300/260 |
12 | 42/16 | 38/22 | 38/32 | 34/40 | 29/50 | 280 | 260/334 | 340/470 | ||
80 | 8 | 40/20 | 36/26 | 34/33 | 28/41 | 24/54 | 81 | 200 | 240/338 | 344/260 |
10 | 53/14 | 49/17 | 49/21 | 43/26 | 38/33 | 230 | 270/368 | 374/300 | ||
100 | 8 | 45/47 | 45/60 | 40/75 | 35/93 | 29/117 | 121 | 220 | 235/317 | 323/280 |
10 | 76/26 | 74/32 | 64/40 | 57/50 | 49/63 | 260 | 305/381 | 387/320 | ||
125 | 6 | 48/38 | 42/47 | 38/59 | 34/74 | 29/92 | 180 | 250 | 282/314 | 316/320 |
8 | 85/23 | 77/29 | 66/36 | 58/45 | 50/56 | 290 | 382/386 | 388/360 | ||
150 | 6 | 49/42 | 44/50 | 40/62 | 34/78 | 29/97 | 257 | 250 | 282/339 | 338/320 |
8 | 79/34 | 71/43 | 64/51 | 54/59 | 46/65 | 290 | 356/399 | 402/360 | ||
200 | 6 | 52/49 | 46/55 | 42/68 | 38/78 | 34/111 | 479 | 300 | 280/348 | 348/370 |
8 | 73/31 | 65/44 | 59/52 | 53/58 | 48/78 | 340 | 340/402 | 402/420 | ||
250 | 6 | 72/30 | 63/34 | 59/42 | 52/45 | 47/55 | 769 | 300 | 315/379 | 415/420 |
8 | 108/16 | 97/21 | 87/35 | 79/39 | 71/47 | 360 | 393/459 | 493/460 | ||
300 | 6 | 72/51 | 65/55 | 59/59 | 52/65 | 47/71 | 1105 | 340 | 366/427 | 466/488 |
8 | 108/32 | 97/35 | 87/37 | 79/41 | 71/45 | 400 | 464/525 | 564/520 | ||
350 | 6 | 72/58 | 65/62 | 59/67 | 52/74 | 47/81 | 1307 | 340 | 397/452 | 497/480 |
8 | 10/38 | 7/41 | 87/44 | 79/48 | 71/47 | 420 | 509/564 | 609/540 | ||
400 | 6 | 72/54 | 65/58 | 59/62 | 52/68 | 47/75 | 1611 | 340 | 412/478 | 512/480 |
8 | 108/36 | 97/39 | 87/43 | 79/47 | 71/52 | 420 | 522/588 | 622/560 | ||
450 | 6 | 108/32 | 97/35 | 87/37 | 79/41 | 71/45 | 1972 | 340 | 403/498 | 503/500 |
8 | 162/20 | 145/22 | 131/23 | 118/25 | 106/28 | 450 | 503/658 | 603/590 | ||
500 | 6 | 108/59 | 97/64 | 87/68 | 79/75 | 71/82 | 2445 | 340 | 431/523 | 531/500 |
8 | 162/34 | 145/37 | 131/39 | 118/43 | 106/48 | 450 | 531/665 | 631/600 | ||
600 | 6 | 108/74 | 97/80 | 87/85 | 79/94 | 71/103 | 3534 | 380 | 478/548 | 578/540 |
8 | 162/42 | 145/45 | 131/49 | 118/53 | 106/60 | 658/679 | 758/640 | |||
700 | 4 | 108/67 | 97/72 | 87/77 | 79/85 | 71/95 | 4717 | 1110 | 490 | 550 |
6 | 162/42 | 145/45 | 131/49 | 118/53 | 106/60 | 690 | 670 | |||
800 | 4 | 120/88 | 108/95 | 102/102 | 94/112 | 82/123 | 5822 | 1265 | 502 | 560 |
6 | 183/67 | 164/72 | 156/77 | 144/85 | 125/93 | 610 | 600 | |||
900 | 4 | 120/84 | 108/90 | 102/97 | 94/107 | 82/117 | 7620 | 1186 | 620 | |
6 | 183/60 | 164/65 | 156/69 | 144/76 | 125/84 | 720 | ||||
1000 | 4 | 120/91 | 108/98 | 102/105 | 94/166 | 9043 | 1286 | 690 | ||
6 | 183/59 | 164/65 | 156/71 | 144/81 | 790 |