some questions

What is the advantage/disadvantage of 'short pattern' over 'long pattern' ball valve ?
What is the advantage/disadvantage of 'reduced bore' over 'full bore' ball valve ?
What is the advantage/disadvantage of 'non split body' over 'split body' ball valve ?
What is the advantage/disadvantage of '2 piece body' over '3 piece body' ball valve ?
The raised face for 150# and 300# flanges is 1.6mm and for 600# and above it is 6.4mm. Why is it so ?
Why does the 'C' dimension of the flange includes the raised face for 150# and 300#, but excludes the raised face for 600# and above?

What are the advantages/disadvantages of spiral wound gaskets 'with inner ring' over 'without inner ring' ?
How to categorise the Cu-Ni nipple ? As pipe (EEMUA 144) or as fitting (EEMUA 146) ?
Although it is recommended to use the 'specification gaskets' for hydro testing insted of 'temporary' or 'non spec' gaskets, is it written in any code/standard to do so ?

Have a nice day.
-Mandar.
This message comes from Mandar's desk.

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[Non-text portions of this message have been removed] Received on Sun Mar 30 11:23:00 2003