PMI on weld
PMI on weld
(OP)
I used ER316L filler wire for welding of 4" sch 80 piping ,PMI is required on weld metal so I carried the same & found that %Mo is 1.2 to 1.3 only. When I carried the PMI on same batch filler wire %Mo found is 2.04 which is just meeting the requirement.
Why PMI value are less in weld .will code allow such variation?
Any code reference will help?
Why PMI value are less in weld .will code allow such variation?
Any code reference will help?





RE: PMI on weld
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: PMI on weld
Some of the newer hand held alloy analyzers have increased accuracy based on increased dwell time.
RE: PMI on weld
XRF is not the only PMI analytical mode. I have had occasion to use portable, light emitting, spectroscopic analyzers that provide extrodinarily accurate elemental analysis and have verified that analysis with laboratory analytical instruments.
RE: PMI on weld
specification only calls for PMI on PM & weld no other limits specified so it looks fine to me now