Calculate the leak rate and equivalent pin hole diameter from pressure drop and time period data (DNVGL-RP-F115 Appendix C).
Enter data as comma or tab separated pairs (Ti, Pi), with each data pair on a new line. Pressure can be entered as either the measured pressure at each time point, or as the total drop in pressure at each time point. Use the data plot option to display the data points, and the best fit line. Use the unrestrained option for risers, spools, and piping. The restrained option should be used for pipelines.
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
- loadtype : Pipe Load Type
- Tdata : Delta Volume Data Values
- Pdata : Delta Pressure Data Values
- T : Delta Volume
- ν : Pipe Poisson's Ratio
- E : Pipe Elastic Modulus
- K : Test Fluid Bulk Modulus
- L : Pipe Length
- Cd : Pinhole Leak Discharge Coefficient
- ρt : Test Fluid Density
- ΔPw : Pipe Wall Pressure Difference
Tool Output
- ΔP : Delta Pressure
- F : Pressure Response Term
- ID : Inside Diameter
- OD : Outside Diameter
- P/T : Leak Pressure Drop Rate
- Q : Leak Volume Flowrate
- Vo : Unpressurised Fluid Volume
- d : Pinhole Leak Inside Diameter
- tn : Nominal Wall Thickness