Pipelines & Pipeline Safety - EXPANSION LOOPS (or BENDS) PDF Print E-mail
Written by Norrie   
Thursday, 29 April 2010 19:53
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Pipelines & Pipeline Safety
TRANSMISSION OF FLUIDS
JOINING OF PIPELINES
PIPELINE SUPPORTS
PIPELINE ANCHOR POINTS
EXPANSION LOOPS (or BENDS)
PIPELINE SAFETY
'SHAFER' AUTOMATIC LINE-BREAK VALVE
LINE BREAK - SHAFER VALVE CLOSES
AUTOMATIC RESET
RE-OPEN THE SHAFER VALVE
PIPELINE SPHERING
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EXPANSION LOOPS (or BENDS)

Most materials, when heated or cooled, will expand or contract. The degree of expansion (or contraction) depends on :

  1. The Temperature Change.
  2. The Original Size of the Material.
  3. The Co-efficient of Linear (length), and Cubical (volume), Expansion of the Material.

As mentioned earlier, hot or cold pipeline contents and extreme changes in ambient temperature, will cause the expansion or contraction of the pipeline. In this case, we are mainly concerned with the change in length of the pipeline. (The longer the line, the greater the change in length).

For this reason, expansion loops or bends are incorporated into some pipeline constructions in order to minimize the forces set up by the changes in length.

(See Figure : 6)

Figure : 6



Last Updated on Thursday, 29 April 2010 19:56