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Durable Stainless Steel 304/316L Bellows Expansion Joint for Pipelines. Made of high-grade stainless steel 304/316L, offering excellent corrosion resistance, high-temperature resistance and long service life in harsh industrial environments. Effectively absorbs axial, lateral and angular displacement caused by thermal expansion, contraction and vibration in pipeline systems, protecting pipes and equipment from stress damage. material grade to meet specific requirements, widely used in steam, chemical, HVAC, power and water treatment piping systems.