Stainless steel flange corrugated wear-resistant expansion joint
2021-11-29 14:42:04 COMMENT：0 HITS：
Stainless steel flange corrugated wear-resistant stainless steel expansion joint is mainly processed into a ring belt with glass fiber cloth and glass fiber coated rubber cloth or fluoroplastic cloth as the main data, and then assembled with metal support and dust bag. It is often used on the outlet from cylinder to tail flue and secondary air preheater.
Check the clearance between the flange corrugated wear-resistant stainless steel expansion joint and the shaft or shaft sleeve. The inner diameter of the flange corrugated wear-resistant stainless steel expansion joint is generally 1 ~ 2mm larger than the shaft diameter. The primary function of the surface layer of the expansion joint is to accept the pressure of the flue gas system and the chemical corrosion from the flue gas or the outside. The surface layer of the flange corrugated wear-resistant stainless steel expansion joint must be soft to absorb the displacement from all directions.
The outer layer generally adopts silicone rubber coated glass fiber cloth with good weather resistance, or fluororubber coated glass fiber cloth, which can decide whether to make other insulation layers according to the temperature of the system.
The function of the insulation layer is to provide a layer of insulation layer to ensure that the flange corrugated wear-resistant stainless steel expansion joint will directly contact the high-temperature flue gas, so as to make the ring belt surface work within the service temperature. The thermal insulation layer can deal with the cooling and condensation of hot steam in case of non thermal insulation layer.
It adopts high temperature resistant and high strength glass fiber, which is a kind of glass fiber fabric through special treatment. The flange corrugated wear-resistant stainless steel expansion joint has a close organizational structure and high temperature resistance, which can well protect objects from thermal points and spark areas, directly reduce spark splash, block and block flammable and explosive dangerous goods, and silicone tape can be made into fire curtain, mask, insulation sleeve, etc.
Measure the size of the sealing surface of the flange corrugated wear-resistant stainless steel expansion joint. When different friction materials are selected, the radial width of the friction surface of the hard material shall be 1 ~ 3mm larger than that of the soft material, otherwise it is easy to cause the edges and corners of the end face of the hard material to be embedded into the end face of the soft material.
For the stainless steel expansion joint, in order to ensure the floatability, the inner diameter is 0.5 ~ 1mm larger than the shaft diameter to compensate for the vibration and deflection of the shaft, but the gap should not be too large, otherwise the sealing ring of the flange corrugated wear-resistant stainless steel expansion joint will be clamped and the pipeline will be damaged.
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