ASME Section VIII, Div. 1, Impact Testing for Welding Procedures to weld repair SA-352, LCC material
ASME Section VIII, Div. 1, Impact Testing for Welding Procedures to weld repair SA-352, LCC material
(OP)
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.





RE: ASME Section VIII, Div. 1, Impact Testing for Welding Procedures to weld repair SA-352, LCC material
As a side note, you are invoking Section VIII, Div 1 requirements on a compressor case?
RE: ASME Section VIII, Div. 1, Impact Testing for Welding Procedures to weld repair SA-352, LCC material
RE: ASME Section VIII, Div. 1, Impact Testing for Welding Procedures to weld repair SA-352, LCC material
The base material does not require impact testing based on Section VIII Div 1 requirements.
RE: ASME Section VIII, Div. 1, Impact Testing for Welding Procedures to weld repair SA-352, LCC material
Admittedly, I'm looking at it from the foundryman's side of things where our first obligation is the material specification and then meeting the additional specifications. In the last 42 years I've never seen an impact requirement removed or waived by a customer for any of the A352 materials, at least at our level in the food chain.
RE: ASME Section VIII, Div. 1, Impact Testing for Welding Procedures to weld repair SA-352, LCC material
We are building a compressor case to API 617. For repairs to fabricated cases, this spec. specifies that the repair has to be in accordance with Section VIII.
RE: ASME Section VIII, Div. 1, Impact Testing for Welding Procedures to weld repair SA-352, LCC material
I understand from your perspective that you are certifying the material for -50 deg F impact per the material specification, and rightfully so. This is an end user application, after certification, and if the code of construction exempts impact testing for -20 deg F and higher for end use, I see no reason to impact test for the sake of trying to consider this as a repair during certification of the casting. If this casting were to be used for Section VIII and was below the -20 deg F, impact testing would be required.
I view it once the material leaves your shop and is accepted for code use at -20 deg F or warmer as with other ferrous materials, no impact testing after material certification is required by the code of construction and in-service.