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PL02 Pipeline Materials, PL03 Pipeline Mechanical Design, image …
PL02 Pipeline Materials
Rigid
Carbon steel
Manufacturing method
Linepipe manufacturing
Seamless
Welded
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Spiral weld
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Grades
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Higher grade
Higher strength
❗ Complex welds
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Lower carbon content, better weldability
Higher carbon content of the parent materials creates higher tendency for hard phase formation in the weld which leads to higher hardness and brittleness of the weld
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CRA Clad
📝CRA Material specs
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Prone to pitting, chlorides exposure
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Non-Metallic
Flexible Composite Pipe
Semi-Bonded
Reinforced Thermoplastic Pipe
Unbonded
Conventional Steel Flexible
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Fully Bonded
Thermoplastic Composite Pipe
Other Non-Metallics
HDPE
GRE
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Dynamic
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💭 Considerations
Fatigue
Pipe exposed to vortices due to wave and current
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Affecting welds
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🔁 Currents
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2 types
1) Wave induced current
How is this calculated?
Using mathcad sheets/spreadsheets, based on: 1) Different wave theories, 2) Wave height, 3) Water depth and 4) Periods, can be comnverted to current particle velocities, as a function of Hs (Significanr wave height)
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