Nandesh,
These are the EN 287 designations for welding positions.
PA = Flat (both butt and fillet)
PB = horizontal (fillet)
PC = 2 G
PD = horizontal overhead (fillet)
PE = overhead (butt)
PF = perpendicular uphill (both fillet and butt)
PG = perpendicular downhill (both fillet and butt weld)
Best regards,
Stephan