Single Point Explosive Charge

A single point charge is used in estimating the stress magnitudes to the pipe.

A=R

The minimum distance from the pipeline to the nearest explosive charge must be greater than two times the outside pipe diameter.

PTLB Pipe Blast 2.1_Intro.png

π‘…Β βˆ’ Distance from the Charge to the Pipeline(ft)

π‘ƒΒ βˆ’ MAOPβˆ’Maximum Allowable Operating Pressure(psi)

π·Β βˆ’ Pipeline Outside Diameter(in)

π‘‘Β βˆ’ Pipe Wall Thickness(in)

π‘†β„ŽΒ βˆ’ Hoop Stress(psi)

PLTB Pipe Blast 2.1_Intro 2 Revision 082720.png

π‘†π‘Β βˆ’ Maximum Circumferential =Β π‘†π‘™Β βˆ’ Maximum Longitudinal Stress(psi)

π‘›Β βˆ’ Equivalent Energy Release Ratio

π‘ŠΒ βˆ’ Weight of Single Charge(lbs)

πΈΒ βˆ’ Modulus of Elasticity

π‘‘Β βˆ’ Pipe Wall Thickness(in)

π‘†π‘‘Β βˆ’ Combined Hoop and Circumferential Stress(psi)

PLTB Pipe Blast 2.1_Intro 3 Revision 082720.png

Blasting Conditions for combined Stress Level
πΆπ‘Žπ‘™π‘†π‘€π‘Œπ‘† > %π‘†π‘€π‘Œπ‘† βˆ’ NOT ACCEPTABLE/πΆπ‘Žπ‘™π‘†π‘€π‘Œπ‘† <%π‘†π‘€π‘Œπ‘† βˆ’ ACCEPTABLE

Input Parameters

  1. To create a new case, click the β€œAdd Case” button
  2. Select the Single Point Explosive Charge application from the Pipe Blast module.
  3. Enter Case Name, Location, Date and any necessary notes.
  4. Fill out all required fields.
  5. Make sure the values you are inputting are in the correct units.
  6. Click the CALCULATE button.
  • Pipe Outside Diameter
  • Pipe Wall Thickness
  • Specified Minimum Yield Strength
  • Maximum Allowable Combined Stress Level – SMYS
  • Manufacturer
  • Explosive Type
  • Equivalent energy release ratio
  • MAOP – Maximum Allowable Operating Pressure
  • W1 – Weight of Single Charge
  • n – Equivalent Energy Release Ratio
  • R – Distance of the Charge to Pipeline

PLTB Pipe Blast 2.1_Input Revision 082720.png

Outputs/Reports

  1. View the results.
  2. If an input parameter needs to be edited be sure to hit the CALCULATE button after the change.
  3. To SAVE, fill out all required case details then click the SAVE button.
  4. To rename an existing file, click the SAVE As button. Provide all case info then click SAVE.
  5. To generate a REPORT, click the REPORT button.
  6. The user may export the Case/Report by clicking the Export to Excel/PowerPoint icon.
  7. To delete a case, click the DELETE icon near the top of the widget.
  • Sh – Hoop Stress
  • Sc-Maximum Circumferential = Sl-Maximum Longitudinal Stress
  • St – Combined Hoop && Circumferential Stress
  • S – Total Combined Stress
  • Calculated Percent of SMYS
  • Blasting Conditions for Combined Stress Level:

PLTB Pipe Blast 2.1_Output Revision 082720.png

Related Links

Pipeline HUB β€” User Resources

Table of Contents
Table of Pages
Table of Contents
  1. Pipeline HUB User Resources
  2. AC Mitigation PowerTool
  3. API Inspector's Toolbox
  4. Horizontal Directional Drilling PowerTool
  5. Crossings Workflow
  6. Hydrotest PowerTool
  7. Pipeline Toolbox
  8. Encroachment Manager
  9. PRCI AC Mitigation Toolbox
  10. PRCI RSTRENG
  11. RSTRENG+
  12. Ad-hoc Analysis
  13. Database Import
  14. Data Availability Dashboard
  15. ESRI Map
  16. Report Builder
  17. Crossings Workflow
  18. Hydrotest PowerTool
  19. Investigative Dig PowerTool
  20. Hydraulics PowerTool
  21. External Corrosion Direct Assessment Procedure - RSTRENG
  22. Canvas
  23. Definitions
  24. Pipe Schedule and Specifications Tables