Compensator and expansion joint are the same product, they are just called differently.
Tie rod expansion joints are also called expansion joints, expansion joints, compensators, and expansion joints.
Extensions are divided into steel extensions, rubber extensions, and stainless steel extensions according to materials.
The telescopic device can expand and contract axially within a certain range, and can also overcome the offset caused by different axial directions of pipe docking within a certain angle, which can greatly facilitate the installation and disassembly of valve pipes. The pipeline can expand and contract freely within the allowable expansion amount. Once it exceeds its maximum expansion amount, it will act as a limit to ensure the safe operation of the pipeline.
Mainly to ensure the safe operation of pipelines, it has the following functions: compensating and absorbing axial, transverse and angular thermal deformation of pipelines; absorbing equipment vibration and reducing the impact of equipment vibration on pipelines; absorbing the impact of earthquakes and ground subsidence on pipelines amount of deformation.
1. This product provides great convenience for the installation and replacement of various water supply and drainage pipelines, water towers, water pumps, water meters, and valves, and plays a very good role in regulating the expansion and contraction of long-distance pipelines due to temperature differences. .
2. The pipes of this product are generally divided into two types: metal type and rubber type. The metal type is divided into three types: cast iron, galvanized and steel. The working pressure is divided into three types: PN6, PN10 and PN16.
Sleeve type telescopic device (2 photos)
3. Before installation, loosen the pressure plate bolts, pull the product to the installation length, then tighten it diagonally, and cut Do not press it biased. If it is used overhead, corresponding fixing brackets must be installed at both ends.
4. The flange connection adopts GB4216.3 - 4126.5 standards.
5.
If other specifications are selected, it can be customized and produced separately. Applicable media: This product is suitable for transporting seawater, fresh water, hot and cold water, drinking water, domestic sewage, crude oil, fuel, lubricating oil, refined oil, air, gas, steam with a temperature not higher than 250 degrees, and granular powder media. All products should pass the Pony test before they can be used in projects. The purpose of the expansion joint is to connect pumps, valves, pipes and other equipment with pipelines. They are connected through full bolts to make them whole and functional. A certain amount of displacement facilitates installation. Can withstand the axial pressure of the pipeline. In this way, it can be adjusted according to the on-site installation dimensions during installation and maintenance. During work, it not only improves work efficiency, but also plays a certain protective role in pipeline equipment such as pumps and valves. The classification varies according to each company, and the product models vary: SSQ type cast iron expansion joint, SF steel expansion joint, CS type thermal pipe expansion joint, SSLW filter expansion joint, SSQ-1 type sleeve type expansion joint, SSQ-2 Type casing type expansion joint, SSQ-3 type casing type expansion joint, thermal pipe expansion joint, DC medium non-thrust pipe expansion joint, steel type casing type expansion joint, socket type expansion joint, bearing plate type expansion joint, two End flange limit pull-off pressure plate expansion joint, flange type expansion joint, flange expansion joint at both ends, flange pressure disk type limit expansion joint at both ends, high pressure resistant gray pipe large displacement expansion joint, etc. According to the connection form: flange connection. Flange on one side and weld on the other. Steel expansion joint
According to working pressure: 0.6Mpa, 1.0Mpa, 1.6Mpa, 2.5Mpa, 4.0Mpa, etc. It can also be specially made upon request. According to the appearance, it is divided into: double flange limit, single flange limit, double flange loose sleeve, single flange loose sleeve. The connection method generally includes double flange connection, one side is flanged and the other side is welded. Directly buried expansion joints (not installed in trenches or wells) generally use welding. Material steel, Q235,
cast steel, etc.
General manufacturers can make it as required.
2 Installation precautions
1. Before installation, the model, specifications and pipeline configuration of the telescopic extender should be checked first, and they must meet the design requirements.
2. For expansion joints with an inner sleeve, attention should be paid to making the direction of the inner sleeve consistent with the direction of medium flow. The hinge rotation plane of the hinge-type expansion joint should be consistent with the displacement rotation plane.
3. For expansion joints that require "cold tightening", the auxiliary components used for pre-deformation should be removed only after the pipeline is installed.
4. It is strictly forbidden to use the method of expansion joint deformation to adjust the installation of pipes out of tolerance, so as not to affect the normal function of the expansion joint, reduce the service life and increase the load on the piping system, equipment and supporting components. 5. During the installation process, welding slag is not allowed to splash on the surface of the wave shell, and the wave shell is not allowed to suffer other mechanical damage.
6. After the piping system is installed, the yellow auxiliary positioning components and fasteners used for installation and transportation on the wave expansion joint should be removed as soon as possible, and the limit device should be adjusted to the specified position according to the design requirements, so that The piping system has adequate compensation capabilities under environmental conditions.
7. All movable components of the telescopic device must not be blocked by external components or limit their range of motion, and the normal movement of each movable part should be ensured.
8. During the hydraulic pressure test, the secondary fixed pipe rack at the end of the pipe equipped with the telescopic device should be reinforced to prevent the pipe from moving or rotating. For expansion joints used for gas media and their connecting pipelines, attention should be paid to whether temporary supports need to be added when filling with water.
The 96 chloride ion content of the cleaning fluid used in the hydrostatic test shall not exceed 25PPM.
3 Scope of use: Due to the good comprehensive performance of the telescopic device, it is widely used in chemical industry, construction, water supply, drainage, petroleum, light and heavy industry, refrigeration, sanitation, plumbing, fire protection, electricity and other basic projects .
4 Instructions for use: When installing the expansion joint, adjust the installation length of both ends of the product or the flange, tighten the gland nut evenly diagonally, and then adjust the limit nut, so that the pipe can be expanded and contracted. It can be freely expanded and contracted within the volume range, and the expansion and contraction amount is locked to ensure the safe operation of the pipeline.
5 Service life As we all know, the expansion joint is mainly a compensation element that uses the elastic element of the corrugated compensator to effectively expand and contract to absorb ducts, pipelines, etc. to produce dimensional changes. The expansion joint can be mainly used in the mechanical displacement and heating displacement of the pipeline system to absorb vibration and reduce noise. It can absorb displacement in all directions. Here is a brief explanation. For telescopic devices with an inner sleeve, we should pay attention to whether the direction of the inner sleeve is consistent with the direction of medium flow. Then, whether the hinge rotation and displacement rotation planes of the hinge-type telescopic device are also consistent. In addition, we are prohibited from Using a deformed expansion joint to adjust the installation of the pipeline will affect the normal service life of the expansion joint and increase the burden on the pipeline.