newweldeng09
Mechanical
- Oct 31, 2008
- 84
Hello,
I was wondering if someone can help me out with this scenario. I have a compressor case that needs a weld repair to fix some mis-machined dimensions. The MDMT is -20F and it has to meet NACE MR0175. SA-352 is exempt from impact testing to this Div. in accordance with Fig. UG-84.1, note c. Per UCS-66(j), -20F is the coldest temp. to be assigned to welded components that do not meet UCS-67(a)(3). UCS-67(a)(1) through (a)(3) do not apply in this situation because of the base metal and MDMT. So, the repair welding procedure does not have to be impact tested. Is this correct or am I missing something? It seems odd that the base material has to be impact tested, but the weld and HAZ in the welding procedure does not.
I was wondering if someone can help me out with this scenario. I have a compressor case that needs a weld repair to fix some mis-machined dimensions. The MDMT is -20F and it has to meet NACE MR0175. SA-352 is exempt from impact testing to this Div. in accordance with Fig. UG-84.1, note c. Per UCS-66(j), -20F is the coldest temp. to be assigned to welded components that do not meet UCS-67(a)(3). UCS-67(a)(1) through (a)(3) do not apply in this situation because of the base metal and MDMT. So, the repair welding procedure does not have to be impact tested. Is this correct or am I missing something? It seems odd that the base material has to be impact tested, but the weld and HAZ in the welding procedure does not.