Hot Oil Tracing

Tracing > Hot Oil Tracing

BDP International Ltd. is offering hot-oil tracing systems that transfer heat by using a series of pipes in a closed loop circulation system.

Our experienced team provides total EPC solutions hot-oil tracing systems for refineries and petrochemical industry.

Design notes for hot oil tracing:

  1. Itís necessary to select reasonable figure for glycol tracing system for dP to estimate the flow through tubing (50 psi?). 1/2" tubing is common, 0.049" wt is a common wt. Copper tubing is often used.
  2. Determine how much flow is possible to get through various lengths, 100 to 200 feet is a typical maximum for inplant tracing. Using that flow, estimate the inside heat transfer coefficient through the tracer. At this point, assume negligible dT.
  3. Now, estimate the heat transfer from the tubing surface to the air and pipe. Assume natural convection with a heat transfer resistance from the tracer to the air and then from the air to the pipe, say in the range of 1/4 to 1/2 BTU/hrft2F.

What the purpose of the above calculations is to determine whether the heat transfer from the hot glycol to the pipe is a significant portion of the overall heat transfer coefficient or if it can be neglected . Once an overall heat transfer is known for tubing lengths, you can also see if the dT of the glycol along the length is significant and has to be taken into account. If it is, it would be a good reason to limit the tracer lengths on more critical tracing applications.

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