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What are the applications of maintenance-free, directly buried, unidirectional sleeve compensators?
What are the applications of maintenance-free, directly buried, unidirectional sleeve compensators?
Maintenance-free, directly buried, unidirectional sleeve compensators have the following characteristics:
Maintenance-free, directly buried, unidirectional sleeve compensators play an important role in many industrial fields. Different types of compensators have different application ranges and methods. Compensator joints are widely used in heating pipelines to prevent deformation and damage to these pipelines caused by thermal expansion or temperature-induced stresses during heating.
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Introduction and Functions of Sleeve Compensators
A sleeve compensator, also known as a tubular expansion joint, consists primarily of a sleeve, a shell, and sealing materials. It is a type of compensator that is directly installed in any pipeline conveying non-corrosive fluids flowing in one or multiple directions. It is mainly used to absorb and compensate for axial thermal expansion displacements occurring downstream of linear pipeline auxiliary equipment.
Sleeve Compensator Instructions
Sleeve Compensator Instructions
Sleeve compensator instructions: The sleeve compensator, also known as a pipe expansion joint or pipeline expansion joint, is a compensation device used in hot-fluid pipelines. It primarily serves as an auxiliary component for linear pipelines. It is suitable for media such as hot water, steam, and oils. The sliding sleeve compensates for thermal expansion by allowing the outer sleeve to slide relative to the inner sleeve.
How is the air tightness of bellows compensators tested? What factors affect the service life of bellows compensators?
A bellows compensator with good air tightness will not leak the circulating medium and can absorb deviations in the pipeline. Therefore, high air tightness is a prerequisite for bellows compensators. So, how do manufacturers of bellows compensators test the air tightness of their products?
What is a bellows compensator like?
A bellows compensator, also known as an expansion joint or flexible connector, consists of a bellows, end pipes, supports, flanges, guides, and other accessories. It derives its functionality from its elastic element—the bellows—whose useful elastic deformation allows it to absorb dimensional changes in pipelines, conduits, vessels, and the like caused by thermal expansion and contraction, or to compensate for axial, lateral, and angular displacements in these components. It can also help reduce noise and vibration. Bellows compensators are widely used in modern industry.
Why do bellows expansion joints leak?
Leakage in corrugated expansion joints is mostly caused by improper construction and installation, which results in the pipeline shifting from its designed position during operation. Due to inconsistent pressure resistance in the pipeline foundation, when uneven dynamic or static loads are applied to the ground above the pipeline, the pipeline undergoes uneven settlement, leading to leakage in the sleeve-type expansion joint. Therefore, deformation of the corrugated expansion joint is the root cause of leakage in such joints.
Material Classification of Sleeve Compensators
The basic requirements for sealing materials used in sleeve compensators are: sufficient elasticity and plasticity, the ability to convert axial pressure into significant radial working pressure; good chemical structural stability; low permeability; resistance to abrasion; temperature resistance; ease of replacement; and low cost. Sealing materials can be categorized into molded packing and non-molded packing.
Structural Features of Sleeve Compensators
The inner sleeve of the sleeve compensator is connected to the pipeline and employs a high-performance, self-pressurizing sealing principle and structure. It can freely slide within the sleeve in response to pipeline expansion and contraction, thereby meeting the sealing requirements of any pipeline. The inner sleeve is sealed with a new synthetic material that offers excellent resistance to high temperatures, corrosion, and aging. Its applicable temperature range is from -40°C to 150°C, and under special conditions, it can withstand temperatures as high as 350°C. This design not only effectively ensures axial movement but also guarantees that the medium inside the pipeline remains completely contained and does not leak externally.
Installation Method for Sleeve Compensators
1. When installing sleeve compensators, they should be properly managed and stored to prevent contamination caused by exposure to sunlight, rain, and dust.
2. During installation, verify that the compensator’s model, specifications, and design are consistent. Also, ensure that the product surface is free of defects such as protrusions, dents, or severe corrosion that could affect product quality.
3. If the overall length of a one-time compensator matches the sample results, no stretching or compression is required. However, if the installation markings on the flexible body have changed, they should be adjusted before installation.
Things to Know About Support and Hanger Design and Installation
When installing pipelines, you should follow the installation requirements precisely. If the supports and hangers installed do not meet the acceptance criteria, it could lead to rework and waste of materials. To avoid such issues, be sure to check out today’s article!
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