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  1. wk390107

    Compressed Air Storage

    It is a polymer production plant. It is not looped, and would be impractical to do so. There are some small <50 gallon reciever near some users, but the largest one does not have any. There are big swings during a certain process in which a large amount of air is used for about 1-2 seconds at...
  2. wk390107

    Compressed Air Storage

    Afternoon all, We currently have three air compressors at our plant. A 100HP (load-unload), 60HP (modulation), and a 50HP (modulation) - the 50HP is rarely used due to it's age. I had an air survey conducted to evaluate the system for possible improvements. I found that the flow is less than...
  3. wk390107

    Welding AL6XN - is annealing needed if done with a filler metal?

    Hello everyone, We are currently experiencing chlorine corrosion issues on a lid to a piece of equipment in our plant. The lid is currently made out of 316L and the decision was made to make the lid out of AL6XN, but I have a few concerns about welding it. I know that welding AL6XN can...
  4. wk390107

    Variable Speed Compressor Concerns

    Hello All, I am currently working on a proposal to replace the plant compressors. The plant currently has one 100hp load-unload compressor and one 60hp inlet modulation compressor. The idea was to replace both of the compressors with a single large VS compressor. However during a recent air...
  5. wk390107

    Explosion Protection in Small Ribbon Blender?

    I know per NFPA 654 7.2.3.3 that fixed bulk containers do not have to have explosion protection if they are <8cf, and that NFPA 654 7.13.1.1.2 says air-material separators that have a volume of less than 8cf do not need to have explosion proofing either. I am guessing that a blender would...
  6. wk390107

    Explosion Protection in Small Ribbon Blender?

    I am currently evaluating adding a small ribbon blender to be used in our compounding area to mix additives. This is small semi-portable ribbon blender that is only 15 cubic feet in volume. I am trying to determine if it needs to be under a nitrogen purge to avoid a possible dust explosion...

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