sadra
Petroleum
- Jun 3, 2002
- 35
HELLO,
WE HAVE A PROBLEM IN WELDING OF MATERIAL WITH SAME P-NO. BUT
DIFFERENT GROUP NOS.
AS WE FOLLWD ASME SECTION IX WE FOUND IN QW403.5 THAT IF THERE IS NOT ANY CHANGE IN ESSENTIAL VARIABLES EXEPT IN GROUP NO. THEN WE CAN QUALIFY PROCEDURE FOR WELDING OF THE SAME MATERIAL WITH THE SAME P-NO. AND GROUP NO. AND THEN IT QUALIFIES WELDING OF TWO TYPE OF MATERIALS WITH THE SAME P-NO. BUT DIFFERENT GROUP NOS.
THIS PROBLEM IS SPECIALLY IN WELDING OF PIPES TO FLANGE AND FITTING WHICH HAVE DIFFERENT GROUP NOS. AND EMPHESISE THAT ALL ESSENTIAL VARIABLES (ELECTROD,FILLER,...) ARE THE SAME AND DIFFERENCE IS JUST IN GROUP NOS.
WE HAVE A PROBLEM IN WELDING OF MATERIAL WITH SAME P-NO. BUT
DIFFERENT GROUP NOS.
AS WE FOLLWD ASME SECTION IX WE FOUND IN QW403.5 THAT IF THERE IS NOT ANY CHANGE IN ESSENTIAL VARIABLES EXEPT IN GROUP NO. THEN WE CAN QUALIFY PROCEDURE FOR WELDING OF THE SAME MATERIAL WITH THE SAME P-NO. AND GROUP NO. AND THEN IT QUALIFIES WELDING OF TWO TYPE OF MATERIALS WITH THE SAME P-NO. BUT DIFFERENT GROUP NOS.
THIS PROBLEM IS SPECIALLY IN WELDING OF PIPES TO FLANGE AND FITTING WHICH HAVE DIFFERENT GROUP NOS. AND EMPHESISE THAT ALL ESSENTIAL VARIABLES (ELECTROD,FILLER,...) ARE THE SAME AND DIFFERENCE IS JUST IN GROUP NOS.
