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New Sealing Technology to Overcome Plant/Piping Leakages

[+] Author Affiliations
Anatoly I. Efremov

Consultant

Paper No. IMECE2005-79635, pp. 1347-1350; 4 pages
doi:10.1115/IMECE2005-79635
From:
  • ASME 2005 International Mechanical Engineering Congress and Exposition
  • Manufacturing Engineering and Materials Handling, Parts A and B
  • Orlando, Florida, USA, November 5 – 11, 2005
  • Conference Sponsors: Manufacturing Engineering Division and Materials Handling Division
  • ISBN: 0-7918-4223-1 | eISBN: 0-7918-3769-6
  • Copyright © 2005 by ASME

abstract

Maintenance practice of petrochemical, petroleum refining, fossil fuel and nuclear power generation, and other process industries has demonstrated that plant/piping leakages still remain an unresolved problem, and to overcome leakage occurences in many situations it is necessary to resort to additional remedial maintenance actions including fastener retightening, plant shutdowns, equipment repair or replacement, and so on. One of the main reasons of plant/piping leakages is a low leak tightness of the bolted flanged connections (BFCs) due to operating creep of the fasteners and gaskets. New sealing technology based on “negative creep effect” of the fasteners and gaskets with cores manufactured from shape memory alloys (SMAs) is experimentally studied. The first results of the experiments with the BFCs having cores from SMAs reveal significant decrease of operating creep providing better sealing against plant/piping leakages.

Copyright © 2005 by ASME

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