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Participant

Join Date: May 2006
Posts: 4

Clock-Spring Failure

01/01/2008 6:14 AM

We used clock spring to repair a 42" suction/fill pipeline connected to crude oil storage tank. This was about one year ago. We are now noticing cracks at all connections/joints of the clock spring. Streaks of rust is also noticed along these cracks. This is not a good sign, it is an indication that corrosion is taking place underneath the clock spring.

What could have been responsible for these cracks? The pipeline can be subjected to a temperature variation of about 98degreeF during suction and 105degreeF during filling. Could the expansion and contraction of the pipeline contribute to the formation of these cracks?

1. How can we repair these cracks?

2. How can we address the corrosion that has already taken place?

3. How can we prevent this from happening again?

Happy New Year to everyone!

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Guru

Join Date: Dec 2006
Location: Hop around Toronto, New York & Karachi
Posts: 1876
Good Answers: 19
#1

Re: Clock-Spring Failure

01/01/2008 9:12 AM

E-mail Abdel Halim Galala he is in this field .

Also go to www.clockspring.com or contact sales@clockspring.com since as they name applies they are the registered clock spring makers and will be in the best position to advice.

I believe since they have a shelf life of 12 months from date of manufacture as per their Pdf Catalog, you may need to repalce them with a new one. However, I reserve my comment.

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