Asbestos-free gaskets have been used to seal flanged connections on various applications. This paper discusses the use of a different style of gasket and details the advantages and benefits resulting from such a change. The discussion includes an analysis, supported by laboratory testing and successful field experiences. The paper is sectioned into three case studies, each topic relating to a type of product. The development of high strength asbestos-free sheet materials for usage on split case pumps using modern manmade fibers, including a successful study using the material on a natural gas pumping station on activated methyldiethanolamine (MDEA). The MDEA removes carbon dioxide in natural gas process plants. The successful implementation in the usage of serrated metal core technology with various facing materials, in pump case gaskets, used on hydrocarbon service in oil refineries within the United Kingdom. The development and usage of structurally modified polytetra-fluoroethylene (PTFE) filled products in pumping aggressive chemicals on sealless pumps. The paper details the materials, the application areas, and the problems resolved. Also included are design considerations and an introduction to installation guidance, with discussions on previous failures.
展开▼
