Welded Metal Bellows Expansion Joint

Welded metal bellows expansion joint: The rigid compensation core for high-temperature and high-pressure pipelines
Welded Metal Bellows Expansion Joint takes the metal bellows as the core compensating element and realizes the rigid connection with the pipeline through the welding process. With the characteristics of high temperature resistance, high pressure resistance and corrosion resistance, it becomes the key compensating element in the high-temperature and high-pressure pipeline system. It can effectively absorb the displacement of pipelines caused by temperature changes and equipment vibrations. Rubber Expansion Joint, Bellow Expansion Joint, Flexible Metal Hose, Dismantling Joint, Flange Adaptor, Duckbill Check Valve and other accessories work together to provide reliable rigid compensation solutions for high-temperature and high-pressure pipelines in fields such as power, chemical engineering, and metallurgy. ​
Structural advantage: "Rigid sealing guarantee" of welding process
The core competitiveness of Welded Metal Bellows Expansion Joint stems from the perfect combination of welding technology and metal bellows. Metal bellows are made of thin-walled stainless steel or alloy materials and form a corrugated structure through precise welding. They have excellent axial, lateral and angular compensation capabilities. The welding connection method ensures that they form an integral rigid structure with the pipeline, and their sealing performance is far superior to that of ordinary Flange connection compensation elements. In the high-temperature steam pipeline of thermal power plants, the welded metal bellows Expansion Joint and Flange Adaptor cooperate to resist the impact of high-temperature steam above 400℃. Its rigid structure is in line with the metal compensation characteristics of the Bellow Expansion Joint, jointly ensuring the safe operation of the steam pipeline under high temperature and high pressure. ​
The multi-wave structure of metal bellows can achieve large displacement compensation. A single section of expansion can absorb several centimeters of axial expansion or lateral displacement. This compensation capacity is particularly important in long-distance high-temperature pipelines. In the outlet pipeline of the chemical cracking furnace, it cooperates with the Metal braided layer of the Flexible Metal Hose . The former compensates for the large displacement caused by the thermal expansion and contraction of the pipeline, and the latter absorbs the vibration of the equipment. The Dismantling Joint is installed in the maintenance section for easy maintenance. The three work together to deal with the pipeline stress under complex working conditions. ​
Performance characteristics: A "weather-resistant powerhouse" in high-temperature and high-pressure environments
The high-temperature resistance of Welded Metal Bellows Expansion Joint makes it the preferred compensating element for high-temperature pipelines. It can withstand an extreme temperature range from -200 ℃ to 600℃. In the steam pipeline of the steelmaking converter in the metallurgical industry, it can withstand the continuous scouring of high-temperature steam for a long time. Combined with the high-temperature resistant model of Bellow Expansion Joint, it forms a compensating relay in different temperature sections. The Rubber Expansion Joint is installed in the normal temperature section of the pipeline to absorb vibration and achieve temperature adaptation for the entire system. ​
High-pressure load-bearing capacity is another core advantage of welded metal bellows expansion joints. By rationally designing the wall thickness and wave number of the bellows, they can withstand pipeline pressure as high as tens of megapascals. In the outlet pipeline of the high-pressure reactor in the petrochemical industry, it can resist the high-pressure impact of the reaction medium, corresponding to the high-pressure sealing characteristics of the Duckbill Check Valve . Combined with the Flange Adaptor, it can be connected to pipelines of different pressure grades to ensure that the high-pressure medium is transported without leakage. ​
Compensation function: "Precise Absorber" for multi-directional displacement
The Welded Metal Bellows Expansion Joint can achieve multi-directional displacement compensation. Besides axial expansion and contraction, it can also absorb lateral offset and angular deflection. This all-round compensation capability has obvious advantages in complex pipeline layouts. In the cooling water pipeline of the nuclear power plant, the pipeline undergoes multi-dimensional displacement due to equipment vibration and temperature changes. Welded metal bellows Expansion joints cooperate with Bellow Expansion Joints. The former resolves lateral and angular displacements, while the latter compensates for axial expansion and contraction. The Flexible Metal Hose connects monitoring instruments to adapt to minor displacements, jointly ensuring the stable operation of nuclear safety equipment. ​
The rigidity of metal materials endows them with excellent fatigue resistance, enabling them to withstand tens of thousands of displacement cycles without failure. In the low-temperature pipelines of air separation equipment, this fatigue resistance is particularly important - expansion joints repeatedly compensate for the cold contraction and thermal expansion displacements of the pipelines, and when combined with Dismantling joints, it is convenient to regularly inspect the condition of the bellows The Flange Adapter ensures a sealed connection in low-temperature environments and extends the service life of the equipment. ​
Scene Adaptation: The "Main Compensation Force" for Industrial high-temperature Pipelines
The power industry is the core application area of Welded Metal Bellows Expansion Joint. In the main steam pipeline of the boiler, it compensates for the axial elongation of the pipeline caused by high temperature. It cooperates with the metal compensation section of the Bellow Expansion Joint to form a complete compensation system in the inlet and outlet pipelines of the steam turbine. The Rubber Expansion Joint is installed at the outlet of the water pump to absorb low-frequency vibration. The three parties work together to ensure the stable operation of the generator set. In the flue gas pipeline of waste incineration power generation, welded metal bellows expansion joints resist flue gas corrosion and high temperature, cooperate with Duckbill Check valves to prevent flue gas backflow, and connect flue ducts of different materials with Flange adaptors. ​
High-temperature and high-pressure pipelines in the chemical industry also rely on welded metal bellows expansion joints. In the reaction pipeline of the ammonia synthesis plant, it compensates for the displacement caused by the temperature change of the catalyst bed, and cooperates with the high-temperature resistant branch pipe of the Flexible Metal Hose to adapt to the tiny vibration of the equipment. Youdaoplaceholder0 Joint facilitates the disassembly of the pipeline when the catalyst is replaced, ensuring the safety and controllability of the chemical reaction. In the high-temperature pipelines of silicone production, the corrosion-resistant metal material of the Expansion Joint can resist the corrosion of silicon vapor and form protection with the corrosion-resistant Rubber of Rubber Expansion Joint in different temperature segments. ​
System Collaboration: "Efficiency Upgrade" through Accessory Linkage
In the complete industrial piping system, the synergy effect of the Welded Metal Bellows Expansion Joint with other fittings is significant. In the outlet pipeline of the heating furnace in a large-scale refining and chemical plant, it is segmented with the Bellow Expansion Joint to compensate for the thermal displacement of the pipeline. The welded structure ensures the connection strength at high temperatures. The Flange Adaptor solves the butt connection problem of pipelines of different diameters. The Flexible Metal Hose is connected to a temperature sensor to adapt to pipeline vibration and achieve precise temperature control. ​
In the blast furnace gas pipeline of the steel plant, the welded metal bellows expansion Joint compensates for the expansion and contraction of the pipeline caused by the change of gas temperature, cooperates with the Duckbill Check Valve to prevent gas backflow, and Dismantling joint facilitates the cleaning and maintenance of the pipeline. The Rubber Expansion Joint is installed at the outlet of the fan to absorb high-frequency vibrations. The coordination of multiple accessories makes the gas transmission system safer and more efficient. ​
Welded Metal Bellows Expansion Joint, with the comprehensive advantages of welded rigid connection, multi-directional displacement compensation, and high-temperature and high-pressure tolerance, has become the core of rigid compensation in industrial high-temperature pipeline systems. It works in coordination with accessories such as Rubber Expansion Joint and Bellow Expansion Joint under different working conditions. Through the precise connection of Flange Adaptor and the convenient maintenance of Dismantling Joint, It provides all-round compensation and guarantee for high-temperature and high-pressure pipelines in fields such as power, chemical engineering, and metallurgy, and is a key support for the safe operation of pipelines in complex industrial environments. ​