Axial bellows compensator
General characteristics
Bellows expansion joints are installed in the circuits which circulate a liquid or superheated steam under high pressure. Used in chemical production, energy, gas, oil-refining industry. Successfully dampen the vibration and thermal expansion of the circulation system. Such compensators successfully resist cyclic deformations, quench pressure drops, heat-resistant, can work in vacuum conditions or in a hostile environment. They can be installed anywhere in the pipeline, quenched with cyclic and static loads, fairly compact, inexpensive, require no maintenance during operation, reduce the cost of the repair and maintenance of pipelines.
Design features
The basis of the compensator is one or more bellows, restrictive, connectors and safety valves. The bellows is an elastic single-layer or multilayer shirred casings to separate environments and maintain axial stability, strength and integrity under cyclic lateral, longitudinal and angular bending loads under the action of pressure fluctuation of temperature or mechanical forces.
The compensator is equipped with safety and mounting valves, which optimizes the load on the bellows. Compensators can be of any design, for example: hinged, gimbal or corner.
Use
Oil, chemical industry, energy, gas, automotive, AVMA-, motor-, shipbuilding, heat networks and highways, space and nuclear complex, and heating systems of multi-storey buildings. These compensators are suitable for pipelines of various technological systems. They can connect pipes of different types, sealing the pipe, to divert and absorb the exhaust gases.
Advantages of bellows expansion joints:
| Marking | Type | Description |
|---|---|---|
 |
before Salnikova | no problems due to leaks in wet insulation; no leaks; much cheaper to maintain. |
 |
before P-, G — and Z-shaped | the possibility of installation in hard to reach places; small geometric dimensions; when you compress a low stiffness, which significantly reduces the load on the fixed support; small hydraulic resistance; significantly lower installation time and costs. |
 |
in front of the lens | a much greater axial displacement; bellows expansion joints can be produced and designed for specific tasks; more durable. |
Products
Bellows expansion joints have the following qualities:
| The view compensated offset | Bellows | The material of the bellows | Conditional pass | Operating temperature | Working pressure | Fittings |
|---|---|---|---|---|---|---|
| Lateral, axial, angular and combined. | Multilayer or single-layer bellows. One, and several sections of the bellows. | Corrosion-resistant high-alloy austenitic steel 316L (analogue 03KH17N14M3 steel according to GOST 5632−72), AISI 304 (similar to 08X18H10 steel according to GOST 5632−72), 321 (analogue of steel 08KH18N10T according to GOST 5632−72) according to ASTM-A240 . | Up to 3000 mm | -270°C TO + 750°C | Up to 40 bar | Pipe end flange, welded and threaded connection made of corrosion-resistant steel or carbon steel. There are different options of equipment restrictive and end fittings. |
Axial bellows expansion joint CSR
This type of compensator is used to compensate for temperature changes on straight sections of heating networks by any method of padding. At the straight portion when the mode change the temperature of the thermal network between the fixed supports, the pipeline receives a small increment of length due to thermal elongation. When this resulting voltage compression or tension, as a rule, lead to bending and breakage of the pipes. Selifonova corrugations installed on this stretch of axial bellows compensator CSR deformed elastically, perceived lengthening of the pipeline within his compensating abilities. It is used on water pipelines, pumping stations, heat networks of consumers and other heat structures, devices and mechanisms, electric stations.
Bellows expansion joints shear
Able to absorb and compensate for lateral movement, and shifts of PR relative to its own axis. The design includes rails and restrictive thrust, bearing flanges, cables, may also be mounted on protective housings and internal guides screens that are attached to the pipeline using various types of connecting fittings. Produced in two versions: odnoselchane or dvuhminutniy. Working medium: oil, steam, gas, water, etc.
Angular expansion bellows
Angular expansion bellows have a large bending angle for the relatively small size. They are mainly used in chemical industry and heating networks. Angular expansion bellows are mounted in non-linear pipelines, which have knee or several in one plane. During thermal expansion of straight pipe sections, segments, related and located relative to the first angle, may experience bending moments, which lead to bending of tubes. Pipeline anchoring may experience significant loads, which can lead to the destruction of anchoring. In order to compensate for such deformation of the bellows used in the angular expansion joints. They are also used in the laying of the pipeline in case of changes of direction of the pipeline alignment (slight angles between the sections).
Compensating bellows device of the SSI.PPU.
This device, consisting of a single-section or two-section bellows compensator, which is made of stainless steel, enclosed in a protective steel casing (for the purposes of compliance with asnosti compensator and protection from mechanical damage to the bellows).
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