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fazel1 (Industrial) (OP)
7 Jan 06 5:05
Is the definition of upward or downward which is given in ASME Sec IX only for 3G position or it is also for 5G & 6G position?
metengr (Materials)
7 Jan 06 13:25
Are you asking about welder performance qualification for a particular process?

Review QW-405.3. This applies to upward and downward weld progression changes during vertical welding, if the progression is specified. Vertical does not mean limited to any particular coupon position.
fazel1 (Industrial) (OP)
8 Jan 06 1:15
thank you metenger. in 5G position if we weld continuously , in half of the joint the weld is upward and in half of it the weld is downward. is my opinion correct?
metengr (Materials)
8 Jan 06 10:09
Only if the welder does not understand uphill or downhill weld progression sequence because the pipe is not turned or rolled for the 5G position. Review QW-350 Welding Variables for Welders. If you intend to qualify a welder, it is best to qualify in an uphill progression because vertical-uphill progression qualifies for all other positions - see QW-405.2.
fazel1 (Industrial) (OP)
9 Jan 06 1:17
but if we refer to QW-353 for SMAW or QW-356 for GTAW we can see that a change from uphill to downhill and vice versa is essential variable.
metengr (Materials)
9 Jan 06 7:44
Unless you have a specific need for downhill welding, the welder(s) should qualify with uphill progression. For performance qualification, you must stick with either uphill or downhill progression for the entire coupon.

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