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Meijeren on LIFE SPAN OF THE FABRIC ENVELOPE FOAM SEALS

By: meijeren@cargotransfer.net 
Date: Tuesday, July 12, 2005
Time: 12:00:00 AM

Dear Mihai, interesting topic on the foam filled seal. Your concern on its limited lifespan is very legitimate, and as responded by others already the lifespan of a foam filed seal will definitely be less than 10 years, depending on turnovers for the tank and quality of the tank shell (and welds). It would be good to consider using other seal designs and materials such as special wiper seals or a shoe plate seal. We recently inspected seals we installed that are now older than 10 years and still were in an excellent condition. If you drop us an E-mail we would be happy to send you more specific references and pictures of these inspections done for reputable customers. As we are a sponsor of this forum you can also visit our website under www.cargotransfer.net. We would also be happy to quote you the internal roof required, with different seal arrangements so you can compare their costs and life expectations. Though 20 - 30 years is quite ambitious, we feel comfortable that we can realise this life time on our seal arrangements, Best regards, CTS Cargo Transfer Systems B.V. Gert van Meijeren Managing director

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Featured
Atmospheric Design Pressure
By: Fathi [46]

The whole story is to avoid brittle fracture=

Test temperature shall be equal or warmer than Minimum Metal Design temperature at Test pressure.
------------------

I would limit my minimum testing temperature for a tank (or even for a vessel or a piping system) by the =

Temp = maximum of [ Min(lower shell) , Min(shell# 2) ....Min (Upper shell) ]

For a Shell# i the minimum is function ( of shell tickness , Material group ) and this can be found in API 650 , Fig 2-1

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