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  1. HotPotato

    Need help emphasizing dangers of CIP acid/base solutions

    Hi All, I've come to a facility that is normalized to unacceptable chemical safety procedures and chemical systems design. To prove my point, it required a heated battle to convince the Ops team AND the HSE contact that a phosphoric acid/citric acid solution leak from overhead piping in a busy...
  2. HotPotato

    xPost from Pharma: Sanitary Clamp Replacement

    This is an xPost from the Pharma thread since the forum looks pretty dead. I appreciate your help! Hi All, I have been tasked to head a project to reduce the risk of contamination in our bio-pharma production facility. The main goal is to roll out the use of torque wrenches to use on sanitary...
  3. HotPotato

    Standard Defining Appropriate Overpressure Protection

    After several years in the Industrial Gas industry, I am now working in a pharmaceutical facility that makes use of many positive displacement pumps. There are several instances where a positive displacement pump does not have over-pressure protection. Since pharmaceutical facilities do not...
  4. HotPotato

    Electric Field Proximity Switch Failure - What Gives?

    Hello All, I have recently experienced the failure of a "linear magnetic effect detector". This detector was used to confirm rotation of a spinning bar that had magnets on both ends. This proximity switch worked well for nearly two years but just recently had been failing to detect the rotation...
  5. HotPotato

    Space Heater w/ Auxiliary Box (240V @ 120V)

    Hello All, I received a bid from a vendor that states they are including "Space Heater w/ Auxiliary Box (240V @ 120V)". This space heater will be inside of an industrial 30HP TECO 3600 RPM TEFC 460/3/60 Class 1 Div 2 Groups C & D motor. Could anybody please help me understand EXACTLY what...
  6. HotPotato

    Ammonia Tuning for Injections Rates to the Ammonia Injection Grid

    All, I am working on a competitive bid for a potential customer which includes a replacement-in-kind of an Aq. NH3 vaporizer skid that has met its end of life. The item below was stated in their RFP: Could anybody please provide their opinion on what "Ammonia Tuning for injection rates to the...
  7. HotPotato

    Ammonia Tuning for Injections Rates to the Ammonia Injection Grid

    All, I am working on a competitive bid for a potential customer which includes a replacement-in-kind of an Aq. NH3 vaporizer skid that has met its end of life. The item below was stated in their RFP: Could anybody please provide their opinion on what "Ammonia Tuning for injection rates to the...
  8. HotPotato

    Motor Construction in Laymans Terms

    Hello All, I am a chemical engineer and not familiar with the intricacies of electrical components, but do know enough to do a job. I am currently bidding a job and a skid vendor is offering me either a 25 HP or 30 HP motor. I have two general questions: 1) The power supply is 460V/3PH/60Hz...
  9. HotPotato

    Shaft Critical Speed - In Layman Terms

    I am a chemical engineer and not familiar with the intricacies of rotating equipment. I understand that critical speed is the RPM at which the shaft has a natural frequency and thus experiences high vibration. I am bidding a project that involves the sizing of a blower-motor system. The...
  10. HotPotato

    Inorganic Zinc (IOZ) Primer - Chemistry and Purpose of Top Coat?

    I am researching the use of an inorganic zinc primer to protect hot spots on a unit. I did a bit of research into the chemistry behind it but was only able to come up with this: Link That is a good high level intro. Does anybody have any other information they can provide on the chemistry...

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