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ADIBA NASIR
Associate

Join Date: Sep 2012
Location: Pakistan,Lhr
Posts: 36

LPG Design Pressure

09/12/2012 8:41 AM

As per ASME SEC-VIII DIV-1

maximum allowable working pressure is the internal/external pressure including static head.

In case of LP Gas, design pressure is 250Psi=1.725MPa.

Is static head has been included/not.

Thanks

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PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
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#1

Re: LPG design pressure

09/12/2012 8:51 AM

How would anyone know without knowing the size of the vessel and the amount of substance, the nature of the substance and its temperature <rhetorical question - NNTR>?

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Joshi
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Join Date: Oct 2007
Location: India
Posts: 1246
Good Answers: 34
#2

Re: LPG design pressure

09/12/2012 9:00 AM

The pressure in a LPG container is strictly determined by temperature. Volume is irrelevant.

25 kgf/cm^2 Hydraulic pressure and
Pneumatic pressure of 10 kgf/cm^2,
as per BIS 3196 Part I and Part III latest.
Design pressure*1.5=Hydraulic pressure.

Further info. follow the links:

http://cr4.globalspec.com/thread/31313

Manufacturer of LPG Cylinders Pakistan
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Anonymous Poster #1
#3
In reply to #2

Re: LPG design pressure

09/13/2012 3:34 PM

Joshi is almost correct, ...the design pressure is determined by the "maximum expected" temperature that the vessel may encounter. Volume is irrelevant

The 250 psig number came from a US regulator. It represents a pressure above the maximum vapor pressure that could be generated by the LPG under almost all (high temperature) storage conditions
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