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Installation standard of double flange limit expansion device

Time: 03-17 󰃯 Reading times: 878 󰃳 Editor in charge: The sea 󰃗 Column: product focus

Introduction: The standard GB / t12465-2007 is a new national specification for pipeline machinery and equipment. The steel telescopic products manufactured by the new standard can be integrated into the connection between gate valve and pipeline and pipeline compensation, which is conducive to the disassembly and assembly of gate valve. Telescopic joint

Double flange limit Telescopic device The selected standard GB / t12465-2007 is the new national pipeline machinery and equipment specification. The steel expansion products manufactured by the new standard can be integrated into the connection between gate valve and pipeline and pipeline compensation, which is conducive to the disassembly and assembly of gate valve. The impact toughness of expansion joint equipment and its components should also bear the natural environment standard, main operation parameters, water hammer and seismic fortification intensity of design concept, so as to ensure 30 years of operation life.
Double flange Limit expansion device It is also called expansion joint Compensator Pipeline compensator. The expansion device can be radially retracted within a certain range, and it can also get rid of the deviation caused by the different radial connection of the pipeline in a certain perspective. It can greatly facilitate the installation and disassembly of the gate valve pipeline. In the allowable expansion amount of the pipeline, it can freely expand and expand. Once it is turned over, the large expansion amount will have a limit to ensure the safe operation of the pipeline. The key is to ensure the safe operation of the pipeline, which has the following functions: compensating for the radial, transverse and angular thermal expansion of the digestion and absorption pipeline; digesting and absorbing the vibration of machinery and equipment to reduce the harm of the vibration of machinery and equipment to the pipeline; digesting and absorbing the deformation of the pipeline caused by earthquake disasters and landslides.
The flange limit expansion joint is a kind of compensation connector used to compensate the expansion amount of the pipeline. This product has the effect that can not be underestimated in the pipeline. It not only provides convenience for the engineering construction and installation, but also saves the expenditure and cost for the maintenance in the middle and later period. The double flange limit expansion joint has a certain radial offset compensation effect in the pipeline operation, and has good compensation effect for the pipeline deviation caused by the heat expansion and cold contraction, and the internal depression of the earth Expansion joint It can reduce the blind plate in the pipeline operation and maintain the pipeline to a certain extent, which is very convenient for the installation and maintenance of the pipeline. The double flange limit expansion joint can provide great convenience for the installation and disassembly of various water supply and drainage pipelines, intelligent water meters of centrifugal pumps and gate valves, and provide a very good buffer for the expansion and contraction of long-distance pipelines caused by temperature difference. The double flange limit expansion joint is applicable to the flange connection of the pipeline. In the whole process of installation, the flange of the double flange limit expansion joint should be closely aligned with the flange of the supporting facilities of the pipeline. When the anchor bolt is installed, the method of symmetrical top angle pressurization should be carried out for connection, so as to ensure the complete contact of the flange joint and greatly reduce the engineering construction edge of the pipeline The practical significance of long-term operation of the pipeline is very practical. Vssja-2 or B2F double flange limit expansion joint is installed on the pipeline and can be connected with gate valve. It can not only compensate the expansion of the pipeline, but also provide convenience for the maintenance of the gate valve. Double flange looper flange limit expansion joint is composed of looper flange expansion joint and a flange limit short pipe. The double flange looper flange limit expansion joint can avoid the leakage and damage of the compensation connector due to excessive offset. It is suitable for the pipe looper flange connection which can digest and absorb the radial offset and bear the radial working pressure within the allowable deviation range.
Installation of double flange limit expansion joint shows that vssja-2 double flange limit expansion joint is applicable to both sides of the flange connection. During installation, adjust the connection length between the two sides of the commodity and the flange, and then tighten the gland anchor bolt, and then adjust the limit nut. In this way, the pipeline can freely expand and expand within the scope of expansion, lock the expansion amount, and ensure the safe operation of the pipeline
Working principle: after the looper flange expansion joint is installed behind the pipe, the nut extensible sealing ring is tightened, and with the help of mutual Inclination under the effect of the nut gland, it is pressed on the outside of the water pipe for sealing and connection. When the temperature changes, the water pipe can freely expand and contract in the middle of the connector, the local base moves down, the water pipe can tilt, and ensure the sealing without leakage, thus having the goal of automatic compensation.
The double flange limited expansion joint is composed of itself, sealing ring, gland, expansion short pipe and other key components. The original characteristics of the looper flange expansion joint are basically added with a limiting device, and double nuts are required to lock the larger expansion. The pipeline can freely expand and contract within the allowable expansion amount, and once it exceeds the larger expansion amount, it will have a limit to ensure the safe operation of the pipeline. It is very suitable for the connection in the pipeline with vibration or certain inclination and turning.