|
[China]
Trade Verify
Address: Room 1510, Hengrun International Building, Haidian District, Beijing, China.
Contact name:Vincent
Beijing Hownew Energy Technology Group Co., Ltd |
|
Verified Suppliers
|
|
|
1. Expansion joints(compensators)
Expansion joints, also known as compensators, consist of bellows (elastic components), connectors, supports, flanges, conduits, and other accessories. They are flexible structures installed on vessel shells or pipelines to compensate for stresses due to temperature differences and mechanical vibrations. By utilizing the expansion and contraction of the bellows, they accommodate dimensional changes caused by thermal expansion, contraction, or axial, lateral, and angular displacements in pipelines, conduits, vessels, etc. They can also reduce noise and vibration and are used in heating supply systems. To prevent deformation or damage to heating pipelines due to thermal expansion, compensators are installed to reduce stress on the pipeline walls and valves. Expansion joints offer reliable operation, good performance, and a compact structure, making them widely used in industries such as chemical engineering, metallurgy, and nuclear energy. Different shapes of expansion joints, such as U-shaped, Ω-shaped, and C-shaped, are used in vessels, while pipeline expansion joints are classified into universal, pressure balanced, hinged, and gimbal types based on their structural compensation mechanisms.
| Main Item | Classification | Description |
Metal Expansion Joint | Elbow Expansion 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 consists of inner and outer sleeves capable of relative axial movement. The space between the inner and outer sleeves is sealed with stuffing box. During use, keep both ends of the pipes moving on the same axis. The product mainly consists of sleeves (core tubes), shells, sealing materials, etc. It is used to compensate for axial expansion and axial rotation by arbitrary angle of pipelines. It has the characteristics of small volume and large compensation amount, suitable for hot water, steam, and grease media. By sliding the sleeve against the outer sleeve, it can compensate the thermal expansion. The inner sleeve of the slip-type expansion joint is connected to the pipeline and adopts the principle and structure of high-performance self-sealing dynamic seal. It can slide freely inside the shell with the expansion and contraction of the pipeline, and can meet the sealing requirements of any pipeline. A type of seal with new synthetic material is used between the shell and the inner sleeve, which can withstand high temperatures, possess corrosion resistance, and aging resistance, with an applicable temperature range of -40 to 150 degrees Celsius, and up to 350 degrees Celsius under special circumstances. It can not only ensure axial sliding but also prevent leakage of the medium inside the pipe. | |
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: 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
2. Non-metallic Expansion joints
The non-metallic compensators encompass several types: straight cylindrical, compound, angular, and square. The rectangular variants are predominantly utilized in power plant flue ducts to mitigate thermal displacement and shock. These rectangular compensators feature flange and nozzle connection options.
Compensating segment length(h/m)
| 100 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 550 | 600 | 650 | 700 | 800 | 900 | |
Compensation volume(nm)
| Axial displacement (x/m) | -30 | -50 | -75 | -85 | -105 | -125 | -130 | -140 | -165 | -175 | -195 | -205 | -225 | -240 |
| +15 | +20 | +30 | +36 | +45 | +45 | +50 | +55 | +58 | +62 | +66 | +70 | +74 | +80 | ||
Lateral displacement (y/m) | ±10 | ±15 | ±25 | ±30 | ±45 | ±50 | ±60 | ±68 | ±7o | ±73 | ±75 | ±80 | ±85 | ±90 | |
Working Temperature (t°C) | a=100-200,b=200-300,c=300-450,d=450-500,e=500-600,f=600-700,g=700-1000 | ||||||||||||||
Working pressure P(Kpa) | ±10~±300,if the user requires, the pressure beyond the range, can be designed separately. | ||||||||||||||
Flow rate | a——b | v=8——15 | |||||||||||||
| c——d | v=8——20 | ||||||||||||||
Gas turbine exhaust duct:
Exhaust conduit for gas turbines
Desulfurization system:
Sulfur removal system
Flue ducts and exhaust systems of various industries:
Exhaust piping and systems for diverse industrial applications
Coal-fired boilers, circulating sulfurized bed boilers:
Coal boilers, including circulating sulfurized bed models
Flue ducts of waste heat boilers:
Exhaust piping for waste heat boilers
3. Round Non-metallic Compensator/Expansion Joint
Circular Non-metallic Compensator/Expansion Joint has the following main characteristics:
Compensation for Thermal Expansion: It can compensate in multiple directions, greatly surpassing metal compensators that can only provide single-axis compensation.
Compensation for Mounting Error: Due to inevitable system errors during pipeline connections, fiber compensators effectively eliminate misalignment.
Noise Reduction and Vibration Isolation: Fiber fabric and insulation cotton inherently possess sound absorption and vibration isolation functions, effectively reducing noise and vibration in systems such as boilers and fans.
No Reverse Thrust: As the main material is fiber fabric, there is no transmission of force. The use of fiber compensators simplifies design, avoids the need for large supports, and saves mass materials and labor.
Excellent High-Temperature and Corrosion Resistance: Fluoroplastics and silicone materials selected have excellent high-temperature and corrosion resistance.
Good Sealing Performance: With a relatively complete production and assembly system, fiber compensators ensure no leakage.
Lightweight, Simple Structure, Convenient Installation and Maintenance.
Lower Price Compared to Metal Compensators, Better Quality than Imported Products: The price is 1/2 to 1/5 of imported products, with good damping effects.
Good Sealing Performance: Utilizes large flanges without gaskets, reducing costs and ensuring direct installation.
Long Service Life.
