Loose bolts on Coke structure and Piping – Coking.com

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- February 3, 2005 at 1:02 pm #4383
  
  Pedro Siblesz
  Participant
  
  coking.local Members,
  
  What is your experience with recurrent loose bolts on the Structure and Piping associated to Delayed Coker Drums?
  
  What type of bolts are you using on these piping systems? B7, B16
  Do you have periodic tasks programed to retighten these bolts? How often?
  
  Regards,
  
  P. Siblesz
- November 17, 2005 at 9:55 pm #7718
  
  Anonymous
  Inactive
  
  I worked for a major refinery here in Houston. We had a company check all of the bolting in the drum structure two times in 20 years. We did find a number of bolts missing and loose. We choose to do this about every 10 years. We had B-16 bolts in all of the hot oil lines. We didn’t have any problems with the bolting getting loose on any of our “hot” process piping.
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