ASME SECTION IX

[CARA1981]

A welding procedure specification (WPS) that is qualified with a base material SA 106 Gr B (P-No. 1 Group 1) can be used with a base material ASTM A 350 Gr LF2 Class 1 (P-No. 1 Group 2)? The WPS does not have a PQR qualified with impact testing. The WPS was qualified to Section IX - 2013 using SMAW and filler metal 7018 G.

 

[david339933]

Correct. Group number is a supplementary essential variable and only applies when impacts are applicable.

 

[smart143]

A350 LF2 CL1 material requires impact test , so not sure you can use the above WPS to weld A350 LF2 material as WPS is qualified without impact test

 

[david339933]

The fact that the material specification requires impact testing of the material has no bearing on the qualification of the WPS.

 

[weldstan]

One may use A-350 LF@ in pipe systems not subject to impact testing if one so chooses.

 

[bpv66]

If the existing WPS only indicates "Group 1" then it is not acceptable to use with Group 2 materials.

Although Group numbers are a supplementary essential variable, the WPS should be revised to indicate acceptance of welding on group 2 materials, or "all" group numbers.