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Pipelines & subsea
The pipeline that walks
Pipeline walking and thermal expansion
- Duration
- 2:06
- Year
- 2026
The case
On every hot start-up, a subsea flowline moves 25 mm toward its manifold and does not fully return when it cools. In 20 years and 300 start-ups that is 7.6 m the tie-in spool never asked for. Generic case: 12 in × 15.9 mm X65 flowline, 3 km on sand between a PLET and a manifold, ΔT 80 °C at 15 MPa.
Topics
- Pipeline walking
- Thermal expansion
- Tie-in spools
Basis. Generic synthetic case built for this piece. No client data. Not a design verification.
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