Beijing Hownew Energy Technology Group Co., Ltd
Hownew Energy Technology Group Co., Ltd.
Add to Cart
Flexible Connector Flange Connection Single Sphere EPDM NBR SBR Csm Neoprene Hypalon Rubber Compensator Expansion Joint
Expansion joints(compensators)
Expansion joints, also known as compensators, are integral components in industrial applications. They consist primarily of one or more bellows (elastic elements) along with end connectors, supports, flanges, conduits, and auxiliary components. These flexible structures are designed to be installed on vessel shells or pipelines, effectively compensating for stresses resulting from temperature fluctuations and mechanical vibrations.
By leveraging the expansion and contraction capabilities of the bellows, these compensators alleviate dimensional changes in pipelines, conduits, and vessels caused by thermal expansion and contraction. They also mitigate axial, lateral, and angular displacements, making them invaluable in noise and vibration reduction systems as well as heating supply networks.
When heating pipelines undergo thermal expansion or temperature stress, compensators play a crucial role in preventing deformation or damage. By accommodating pipeline expansion, they reduce stress on pipeline walls and minimize forces acting on valves or support structures.
Due to their elastic nature and ability to expand and contract freely, expansion joints offer reliable operation, superior performance, and a compact design. They are extensively used in various industries such as chemical engineering, metallurgy, nuclear energy, and more.
When it comes to vessel applications, U-shaped expansion joints are the most commonly used bellows shape, followed by Ω-shaped and C-shaped joints. For pipelines, they are categorized based on structural compensation into universal expansion joints, pressure balanced expansion joints, hinged expansion joints, and gimbal expansion joints.
| Main Item | Classification | Description |
| Metal Expansion Joint | ElbowExpansion Joint | Bend the pipe into a U-shaped or other shape, also known as tension bends,are a type of expansion joint that utilizes the elastic deformation ability of the form to compensate. Its advantages are good strength, long service life, and on-site production.The disadvantages are space-consuming, high steel consumption, and high friction resistance. This type of expansion joint is widely used in various steam piping and long pipes. |
|
Bellows Expansion Joint
|
A bellows expansion joint is an expansion joint made of metal bellows. It can expand and contract along the axial direction of the pipeline, and also allows a small amount of bending. In order to prevent exceeding the allowable compensation amount, protective rods or rings are installed at both ends of the bellows, and guide supports are installed on both ends of the connected pipelines. There are also angular and lateral expansion joints, which can be used to compensate for rotational deformations and lateral deformations of pipelines. The advantages of these expansion joints are space-saving, material-saving, easy standardization, and mass production, but the disadvantage is the relatively short lifespan. Bellows expansion joints are generally used in short pipelines with low temperature and pressure. With the improvement of bellows production technology, the application scope of this type of expansion joint is expanding. Currently, bellows expansion joints can be used in pipe systems with a maximum pressure of 6.0 MPa. | |
| Slip-Type Expansion Joint | The slip-type expansion joint features inner and outer sleeves allowing relative axial movement, sealed with a stuffing box to maintain alignment. Comprising sleeves, shells, and sealing materials, it compensates for axial expansion and rotation in pipelines at any angle. With a compact design and substantial compensation capability, it's suitable for hot water, steam, and grease media. Sliding the sleeve against the outer one allows compensation for thermal expansion. Equipped with a high-performance self-sealing dynamic seal, the inner sleeve seamlessly slides within the shell, ensuring effective sealing for any pipeline. Enhanced with synthetic materials, the seal withstands high temperatures, corrosion, and aging, with an applicable temperature range of -40 to 150 degrees Celsius, extendable to 350 degrees Celsius in specialized conditions. It ensures axial sliding and prevents leakage, offering comprehensive functionality for pipeline applications. | |
| Non-metallic Expansion Joint | Rubber Expansion Joint | Composed of rubber and rubber-fiber composite materials, steel flanges, sleeves, and insulation materials, it is mainly used for flexible connections between various fans and ducts. Its functions include shock absorption, noise reduction, sealing, medium resistance, easy displacement and installation. It is an ideal accessory for shock absorption, noise reduction, smoke and dust removal in the field of environmental protection. |
| Fabric Expansion Joint | The fabric expansion joint is mainly made of fiber fabric, rubber, and other high temperature resistant materials. It can compensate for the vibration and deformation of fans and ducts.Fabric expansion joints can compensate for axial, lateral, and angular products, with features such as no thrust, simplified support design, corrosion resistance, high temperature resistance, noise reduction, vibration reduction,and others.It is particularly suitable for hot blast pipes and smoke and dust pipeline of power plant.The non-metallic compensator's fiber fabric and insulation cotton itself have the functions of sound absorption and vibration isolation, therefore they can effectively reducing the noise and vibration of boiler, fan, and other systems. Simple structure, light weight, and easy maintenance. |
Here's a concise list of various stainless steels and alloys:
Super Austenitic Stainless Steel:
- 254SMO
- 904L
- AL6XN
Duplex Stainless Steel:
- 2205 Dual phase steel (S31803)
Nickel Based Alloy Steel:
- INCOLOY 800/800H/800HT/840/825
- INCONEL 600/601/690/625/X-750
Hastelloy Alloy:
- C-276
- C-22
- X
- MONEL 400/K500
Pure Nickel:
- N4
- N6 (Ni200, Ni201)
Titanium Plate For Stamping:
- GR1
- GR2
- TA1
- TA2
Austenitic Stainless Steel:
- SUS304
- SUS304L
- SUS316
- SUS316L
- SUS310S
- SUS321
- SUS316Ti