Beijing Hownew Energy Technology Group Co., Ltd
Hownew Energy Technology Group Co., Ltd.
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Flange Medium pressure mesh covered fluoroplastic composite compensator Expansion Joint for pipeline piping
Expansion joints(compensators)
Expansion joints, commonly known as compensators, are essential components comprising one or more bellows, connectors, supports, flanges, conduits, and additional accessories. These flexible structures, installed on vessel shells or pipelines, effectively mitigate additional stresses resulting from temperature fluctuations and mechanical vibrations. By harnessing the expansion and contraction of bellows, they accommodate dimensional changes in pipelines, conduits, and vessels caused by thermal variations, as well as compensate for axial, lateral, and angular displacements. Beyond this, they contribute to noise and vibration reduction and enhance heating supply systems. To prevent deformation or damage to heating pipelines due to thermal expansion, compensators must be installed, alleviating stress on pipeline walls and supporting structures. With their elastic nature allowing free expansion and contraction, they offer reliable operation, stellar performance, and compact designs. Consequently, they find extensive use in chemical engineering, metallurgy, nuclear energy, and related fields. Vessel expansion joints typically adopt U-shaped designs, while pipeline joints are classified into various types based on structural compensation, including universal, pressure balanced, hinged, and gimbal 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, made of metal bellows, facilitates axial expansion and contraction and allows slight bending in pipelines. Protective rods or rings at both ends prevent over-expansion, while guide supports maintain alignment. Angular and lateral expansion joints compensate for rotational and lateral deformations. While space-saving and cost-effective, they have a relatively short lifespan. Typically used in short pipelines with low temperature and pressure, advancements in bellows production broaden their applications. Currently, they can withstand pressures up to 6.0 MPa in pipe systems. | |
| Slip-Type Expansion Joint | The slip-type expansion joint comprises inner and outer sleeves allowing relative axial movement, sealed with a stuffing box to maintain alignment of pipe ends. It's primarily composed of sleeves, shells, and sealing materials. Designed to compensate for axial expansion and rotation in pipelines at any angle, it offers a compact design with substantial compensation capability, suitable for hot water, steam, and grease media. By sliding the inner sleeve against the outer one, it accommodates 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, primarily composed of fiber fabric, rubber, and high-temperature resistant materials, effectively compensates for fan and duct vibrations and deformations. Offering compensation for axial, lateral, and angular movements, it boasts features like no thrust, simplified support design, corrosion resistance, and high temperature resilience. Ideal for hot blast pipes and smoke and dust pipelines in power plants, its fiber fabric and insulation cotton provide sound absorption and vibration isolation, reducing noise and vibration from boilers, fans, and other systems. With a simple structure, lightweight design, and easy maintenance, it offers a practical solution for enhancing system performance and longevity. |
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