2 replies to this topic

[R NESAMANI]

I am in one pumping station of 1300 km long, LPG pipeline system.
we are using the basket filters in the spur line(8''), which has basket size of 100 micron. But DP across filters are frequently increasing more than 2 kg/cm2 even in the flow rate of 30 MT/hr.

I have gone thru the basket design, it shows the Free flow area ratio of 8.2, i had suggested to increase the free flow area ratio to 12, by
1) Increasing the mesh size to 300 microns
2) Increasing the length of the basket by 10 cm.

Does my suggestion help us to improve the flow capacity of the basket filter...?

1) Increasing the mesh size to 300 microns : Is there any standard by which the LPG quality, in terms of the permissible size of the foreign particle in LPG.
Why do we use 100 micron. Due to the liq.particle size of more than 100 mic. in LPG, liquid film is formed in filter, causing the DP to increase.

If anyone who is in LPG transportation, can tell me the size of the filter used in your application...?

[breizh]

Hi ,
Consider this resource .

Hope this helps

Breizh

[kkala]

Not having experience, a web search shows following LPG strainer openings at first look. Mesh conversion per http://forum.onlinec...hread.php?t=681
1. LPG strainers for pump suction: 1.4 mm (14 mesh), according to Corken, http://www.corken.co...log/lpga600.pdf, page 12.
2. General use of LPG strainers: 0.1 mm (100 μm), required in https://gailebank.ga.../tender8457.pdf, as interpreted.
3. LPG standard strainer openings: 40, 60, 100 mesh (0.42, 0.25, 0.149 mm), as understood in a supplier's list, http://metersmith.en...G_STRAINER.html.
You do not know why 0.1 mm size was selected and consequences when this changes to 0.3 mm. Of course you can try the new size and see.
Are there duplex type strainers for LPG in the market? ( see http://www.trademart...-exporters.html). If so, trying one duplex strainer (size 0.1 mm) could be another option.

Edited by kkala, 10 October 2011 - 08:12 AM.