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High temperature telescopic tube diameter: 76mm - 1500mm diameter size of any temperature: -30 ° --450 ° (according to customer requirements to strengthen the material to achieve a higher temperature) Working Pressure: 450mmWG / (to strengthen the material according to customer requirements to meet higher working pressure) wind speed: 30 m / sec (depending on the diameter size) Purpose: plant, electronic equipment, sewer, metallurgy, moisture, emissions, cooling, ventilation engineering of drainage environmental smoke, moisture, dust, high-temperature gas, ventilation, etc. acting telescopic tube telescopic tube, also known as expansion joints, expansion joints, compensators, divided into: a few major types of bellows, sleeve compensator, rotating compensator, a square natural compensation, etc., which with bellows is more commonly used, mainly for the protection of the safe operation of the pipeline, it has the following effects: 1. Compensation absorb piping axial, lateral, angular distortion to heat. 2. absorb equipment vibration, reducing equipment vibration of the pipeline. 3. absorb earthquake, subsidence of the pipeline deformation.