Design guidelines in LPG piping, what pressure to use?

what is the initial pressure, the secondary pressure and the third pressure to be use?

Answer:
*pl. click:
http://www.boatsafetyscheme.com/download...
http://www.pipesystems.com/doku/nfx_lpg_...
http://www.calor.co.uk/faq/bulk-tanks.ht...

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