Positive Material Identification

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Can the flow meter do PMI? If it can then we may consider.

PMI is a form of x-ray diffraction (XRD) called x-ray florsence (XRF). The new portable units are very accurate (wasn't always so) and are used when a materials chemical composition is either called into question or you may not have a MTR or CMTR. Most elements can be verified by XRF but some cannot be detected due to a small angle of relection, for example carbon. So the PMI cannot be used to certify your material but can only be used to give reasonable assurance. Without an MTR you cannot garauntee the mechanical properties of your materiels if you cannot detect all the critical elements; such as carbon for steel and stainless steels. So if you are trying to qualify this material for an application that has strength and tensile requirements and this is not a final product form (ie not a finished tank that you cannot take a material sample from) you could run mechanical testing on this material and perform an PMI test and be able to give a reasonable assurance you know what the material is.

Looks like this only works on metals. Manufacturer material certification isn't good enough? It costs money to teat and certify materials.

Positive material identification - Wikipedia, the free encyclopedia

XRF PMI cannot detect C. Likewise i havent found any maker to detect, with any accuracy, any element below Ti on the periodic chart. However ,we have saved many millions of $ after installing a XRF PMI program.

Ron

OES optical emission spectroscopy will detect carbon and it comes in portable units. This is Nuke-Engineer responding from my phone. An MTR should be acceptable and you use PMI to back up the MTR. The PMI's made now are very acurate and reliable and the learning curve is short for the tech using it.