Monday, July 19, 2010

[MW:0] query regarding clauses of ASME Sec IX

Dear All,
 
Greetings.
 
please help me to clear  my doubts/queries regarding below clauses/statements with respect to ASME Sec IX.
 
1) whether Qualified PQR   with electrode E 7018-1 will support WPS for electrode E 7018.
 
2) WHY Pulsing current is not used for GTAW.
 
3) WHY 5.0mm diameter electrode shall be used for flat and horizontal position and thickness above 12mm only.
 
4) Please elobrate meaning of para Q403.12. 
 
5) Why t pass> 13mm is essential variable for SMAW process.( please refer QW-253  and QW 403.9)
 
7) Is there any code restrictions for weaving.
 
6) Why change in diameter > 6mm is supplimentray essential variable for SMAW process.( please refer QW-253  and QW 404.7). whether diameter above 6mm can be used for the base metal which dont have impact requirement.
 
 
Thanks in advance for your kind  valuable suggestions.
 
Regards
 
Asad Azmi

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