Calculate the initial penetration depth for a pipeline resting on a sand or clay seabed (DNVGL-RP-F109 section 3.4.6).
Initial penetration is due to the weight of the pipeline. For maximum penetration depth use the maximum contents fluid density (usually the hydrotest fluid density). 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
- 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
- OOD : Pipe Outer Diameter Including Coatings
- 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