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  1. daviedalton

    Basic Question to settle an arguement

    As with israelkk, the required force is the same....You still need double the energy/work, as your travel has doubled.....
  2. daviedalton

    Discolored PTFE lining

    Folks, I've already tried this one elsewhere before I found the plastics forum, All comments appreciated... We have what used to be virgin white PTFE lined piping, which would be exposed to almost everything you can think of , solvents, acids, bases, liquids and vapours at elevated...
  3. daviedalton

    Discoloured PTFE lined piping???

    Thanks for the theories guys..... Ed, rust should be a big no-no. The only other materials of construction in the equipment are glass, Hastelloy C22 and tiny bit of tantalum. Our raw materials are also rigorously tested. Bonzoboy, maximum temperatures we would see in that equipment would be 200...
  4. daviedalton

    Discoloured PTFE lined piping???

    Folks, Don't think this is a corrosion issue as such, but I'm failing to find a satisfactory explanation anywhere else..... We have what used to be virgin white PTFE lined piping, which would be exposed to almost everything you can think of , solvents, acids, bases, liquids and vapours at...
  5. daviedalton

    Cleaning Validation: Set residue limits for CIP-100 and active

    If you don;t know what the next batch will be, you should base your limit on a worst case. Generate a matrix of cleaning limits from product manufactured to the next product in equipment. Base your limits on the tightest spec. If some combinations result in extremly low limits, you should try to...
  6. daviedalton

    Cleaning Validation

    We use conductivity to confirm removal of detergent. I'm also aware of TOC being used......

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