there are afew of them at the plant where i used to work and often
very large one (both rubber and metal and istalled either in pipe
spool or on the equipment itself). most of the ones that ive
replaced has been around for more than 20 years.
where i work, its selecetion/installation are not dictated by the
tradesmen.
- In PipingDesign@yahoogroups.com, Geoff Stone DD&D Australia
<blenrayaust@...> wrote:
>
> These are often used as the tradesmen of the day find it diffciult
to do a good job. The cost of rework on site will invariably justify
the cost of a bellows. Also it is an industry approac. In the
buiilding services and mining industry you ofter see these joints
employed. They are justified by many motherhood statements.
Vibration is real in the building industry but this can be
engineered by using quality products but is rarely done. The maxim
of a year and a day life is good enough for the contractor. No whole
of life cost or NPV calculations. The building developer is onselling
the building to a property fund so doesnt care. The Property
Fund doesnt care as they sell shares to the Pension Fund of some
government department. The building maintenance company doesnt care
as they make money repairing things.
>
> regards
> Geoff
>
> Design Detail and Development (a division of Blenray Pty Ltd) URL
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> Mail Address PO Box 1351 Castle Hill NSW 1765 Australia Tel Mob
0402 35 2313 Office 02 8850 2313 AH 02 8850 2324
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>
> [Non-text portions of this message have been removed]
>
Received on Sat Dec 23 00:27:00 2006