Calculate the erosion rate upstream and downstream of weld joints and step profiles (DNVGL-RP-O501 section 4.6). If the incident angle on the upstream weld is unknown, a conservative value of 60 degrees (1.047198 radians) should be used.
The DNVGL downstream weld calculation has been extended using equations 4.1-4.5 to include pipe materials other than carbon steel (engineering judgement is required).
Tool Input
- schdtype : Pipe Schedule Type
- diamtype : Pipe Diameter Type
- ODu : User Defined Outside Diameter
- IDu : User Defined Inside Diameter
- wtntype : Wall Thickness Type
- tnu : User Defined Wall Thickness
- mvtype : Fluid Density Type
- GORu : User Defined Gas Oil Ratio
- WCu : User Defined Water Cut
- ρu : User Defined Fluid Density
- voltype : Fluid Volume Flowrate Type
- Qou : User Defined Oil Volume Flow Rate
- Qlu : User Defined Liquid Volume Flow Rate
- Ngu : User Defined Gas Mole Flow Rate
- Qfu : User Defined Total Fluid Volume Flow Rate
- Mfu : User Defined Total Fluid Mass Flow Rate
- Vfu : User Defined Fluid Velocity
- pipetype : Pipe Material Type
- ρpu : User Defined Pipe Density
- Ku : User Defined Pipe K Factor
- nu : User Defined Pipe n Factor
- sandtype : Sand Material Type
- ρsu : User Defined Particle Density
- Su : User Defined Sand K Correction Factor
- conctype : Sand Concentration Type
- Qsu : User Defined Sand Volume Flow Rate
- Msu : User Defined Sand Mass Flow Rate
- ppmVu : User Defined Sand ppm Volume
- ppmMu : User Defined Sand ppm Mass
- Msyu : User Defined Sand Annual Mass Load
- lfactype : Erosion Loss Factor Type
- Lu : User Defined Erosion Loss Factor
- weldtype : Weld Type
- ρo : Oil Density
- ρw : Water Density
- Pi : Fluid Absolute Pressure
- T : Fluid Absolute Temperature
- Z : Gas Compressibility Factor
- SG : Gas Specific Gravity
- Ds : Average Sand Diameter
- α : Incident Angle
- h : Weld Height
Tool Output
- ρf : Average Fluid Density
- ρg : Gas Density
- ρl : Liquid Density
- ρp : Pipe Density
- ρs : Sand Density
- At : Area Exposed To Erosion
- C2 : Particle Correction Factor
- F(α) : Impact Angle Factor
- GOR : Gas Oil Ratio
- ID : Inside Diameter
- K : Pipe K Factor
- L : Corrosion Loss Factor
- Mf : Total Fluid Mass Flow Rate
- Ms : Sand Mass Flow Rate
- Qf : Total Fluid Volume Flow Rate
- Qs : Sand Volume Flow Rate
- S : Sand K Correction Factor
- Vf : Total Fluid Velocity
- Vg : Gas Superficial Velocity
- Vl : Liquid Superficial Velocity
- Vo : Oil Superficial Velocity
- WC : Water Cut
- Ww : Water Superficial Velocity
- Xvg : Gas Volume Fraction
- Xvl : Liquid Volume Fraction
- Xvo : Oil Volume Fraction
- Xvw : Water Volume Fraction
- n : Pipe n exponent
- ppmM : Sand Concentration Parts Per Million Mass
- ppmV : Sand Concentration Parts Per Million Volume
- vg : Gas Mole Volume