Stainless Roughness Average

An ASME 2 1 elliptical heads can ensure an increase in pressure resistance of die vessel. Fermenter jackets (e.g., half-pipe, diameter, or true type) should be constructed to sustain die vessel s rated pressure and, thus, enhance its strength. The construction material is type 316L stainless steel, which features an internal mechanical-polish finish of 2B-mill or 25-Roughness Average (Ra) depending on the nature of the fermentation. 

K is directly influenced by the roughness average (Ra) of the metallic counterface for the contact UHMWPE-stainless steel in water under reciprocating pin-on-plate conditions given by the relationship k = 4.0 x 10 Ra (Dowson et ai, 1985). 

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