Carneiro wrote:One tech from Elektra just told me the MAWP (max allowed working pressure) of the Elektra's are 1.5 bar, so makes sense the safety valve was opening around 2-2.2 bar (1.5 times 1.5). I asked what the pressure they use for hydrostatic tests at the factory, I hope I get an answer - as Caesar told me it should be around 4 times the MAWP.
After that, I'll do the steam test around 1.5 bar on a controlled environment for some time, before use the machine.
Márcio.
Márcio-
Clarification on the 1.5x and 4x MAWP numbers. Also as a warning and caution to all, keep in mind that messing around with pressures
is dangerous - IIRC, there was an Elektra that burst while installed in some shop in London.
Industry practice is to hydrostatic test at 1.5 X MAWP.
The pressure vessel should be
designed for 4X MAWP - ie at 4X MAWP, the vessel will burst/yield - DO NOT TEST@ 4x MAWP. I'd be surprised if they production test it at 4x MAWP. What could be the case is they'll test at 4x MAWP for certification that the pressure vessel can withstand 4x MAWP. In some cases they'll test to failure to provide the data that the vessel meets design intent - but they'll do this only on cert/qual products not those for production.
Caesar