Calculate maximum lay tension from lay radius, or minimum lay radius from lay tension for a pipeline resting on a sand, clay or rock seabed (DNVGL-RP-F109 section 4.3).
The calculation ignores the concentrated weight loading at the touchdown point. The penetration depth for rock is assumed to be zero.
Tool Input
- schdtype : Line Pipe Schedule Type
- diamtype : Line Pipe Diameter Type
- ODu : User Defined Outside Diameter
- IDu : User Defined Inside Diameter
- wtntype : Line Pipe Wall Thickness Type
- tnu : User Defined Wall Thickness
- wltype : Pipe Weight Type
- OODu : User Defined Outer Diameter Including External Coating
- wu : User Defined Submerged Weight
- SGu : User Defined Specific Gravity
- soiltype : Soil Type
- ssu : User Defined Clay Undrained Shear Strength
- γs : User Defined Clay Dry Weight Per Voluime
- γs' : User Defined Sand and Rock Submerged Weight Per Volume
- frictype : Friction Type
- μu : User Defined Friction Factor
- sfactype : Safety Factor Type
- Su : User Defined Safety Factor
- loadtype : Load Type
- Ru : User Defined Lay Radius
- Hu : User Defined Lay Tension
- WTi : Pipe Liner Wall Thickness
- ρi : Pipe And Liner Density
- WTo : Pipe Coating Wall Thickness
- ρo : Pipe Coating Density
- ρf : Contents Fluid Density
- ρb : Displaced Fluid Density
Tool Output
- μ : Soil Friction Factor
- Fr : Passive Soil Resistance
- H : Lay Tension
- OOD : Pipe Outer Diameter Including Coatings
- R : Lay Radius
- SF : Safety Factor
- SG : Pipe Specific Gravity Relative To Displaced Fluid
- Ws : Pipe Total Weight Per Length Including Contents and Buoyancy
- zpi : Soil Penetration Depth
- zpi/OOD : ZoD Ratio