Beijing Hownew Energy Technology Group Co., Ltd
Hownew Energy Technology Group Co., Ltd.
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Expansion joints(compensators)
Expansion joints, commonly known as compensators, comprise bellows, connectors, supports, flanges, and other accessories. Installed on vessel shells or pipelines, they mitigate stresses from temperature variations and mechanical vibrations. By leveraging bellows' expansion and contraction, they accommodate dimensional changes and compensate for axial, lateral, and angular displacements. Additionally, they aid in noise and vibration reduction and are crucial in heating supply systems. To prevent deformation or damage to heating pipelines due to thermal expansion, compensators are necessary. Their elastic nature allows for free expansion and contraction, ensuring reliable operation, high performance, and compactness. They find widespread use in chemical engineering, metallurgy, nuclear energy, etc. Vessel expansion joints commonly adopt U-shaped, Ω-shaped, or C-shaped designs, while pipeline joints are categorized into universal, pressure balanced, hinged, and gimbal types based on structural compensation.
| 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 capable of relative axial movement, sealed with a stuffing box to maintain alignment of pipe ends. Comprising sleeves, shells, sealing materials, etc., it compensates for axial expansion and rotation in pipelines at any angle. With a compact design and ample compensation capability, it suits hot water, steam, and grease media. Utilizing sliding sleeves against the outer sleeve, it accommodates thermal expansion. Equipped with a high-performance self-sealing dynamic seal, the inner sleeve seamlessly slides within the shell, meeting sealing requirements. Enhanced with synthetic materials, the seal withstands high temperatures and corrosion, ensuring leakage prevention. It ensures axial sliding and seals effectively, even in extreme temperatures up to 350 degrees Celsius. | |
| 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. |
Super Austenitic Stainless Steel:254SMO,904L,AL6XN
Duplex Stainless Steel :2205 Dual phase steel (S31803)
Nickel Based Alloy Steel:INCOLOY800/800H/800HT/840/825,INCONEL600/601/690/625/X-750
Hastelloy Alloy C-276/C-22/X,MONEL400/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