B16.5 Flange Ratings
B16.5 Flange Ratings
(OP)
Does anyone know the difference between A182 F316 and A182 F316L Flanges? They have the same amount of Cr, Ni, and Mo, but have different pressure ratings and they are categorized in different material groups.





RE: B16.5 Flange Ratings
Grade 316 is the standard molybdenum-bearing grade, second in importance to 304 amongst the austenitic stainless steels. The molybdenum gives 316 better overall corrosion resistant properties than Grade 304, particularly higher resistance to pitting and crevice corrosion in chloride environments.
Grade 316L, the low carbon version of 316 and is immune from sensitisation (grain boundary carbide precipitation). Thus it is extensively used in heavy gauge welded components (over about 6mm). There is commonly no appreciable price difference between 316 and 316L stainless steel.
RE: B16.5 Flange Ratings
See thread330-159413: 316/316L Dual Certifications
http://www.spiusa.com/Ref001/austenitic.html
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RE: B16.5 Flange Ratings