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  1. hershey28

    150lb Flange Pressure Capability

    Thanks to all for "setting me straight". FYI, I specified 300# flanges on my P&ID, reviewed it with the piping contractor, and pointed out conserns on several occasions. Never the less, after a field inspection we found 150's installed in all the piping hung to date (~40% of an 850ft run...
  2. hershey28

    150lb Flange Pressure Capability

    There is indeed lots of data showing ANSI 150 flange limitation of 285psig at <100degF. I am trying to justify using 30+ ea 150# flanges already installed in a pipeline rather than remove them. Will use gaskets capable of pressure needs. Can I torque bolts enough and rely on the flange to...
  3. hershey28

    150lb Flange Pressure Capability

    Can't find data showing pressure capability of Class 150 steel weldneck flange. Not concerned about pressure vs. temp, but, rather pressure vs. bolt torque. I want to use 150lb flanges in an application where system pressure MAY reach 500 psig, normal operating range will be less than 100...
  4. hershey28

    304 SS pH Compatability @ &lt; 5.0pH

    Thanks for the reply. This is an aqueous solution of Sorbitol, hexane-1,2,3,4,5,6-hexaol. About 70% solids. Use temp is ambient ~ 80F. Any acidity is from the solution itself. Downstream processing includes high shear mixing with other liquids (mostly), including corn syrups, water, and...
  5. hershey28

    304 SS pH Compatability @ &lt; 5.0pH

    Food application: Spec changing for a sugar solution from normal 7.0pH to less than 5.0pH. Is this likely to be a corrosive issue with 304 SS?

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