Determining Yield Pressure

  • Given these uncertainties predictions of the hoop stress from internal operating pressures that may cause the pipe wall to yield are calculated using formulas validated by millions of miles of pipe operated within design limits without incident.
  • For U.S. gas and hazardous liquid pipelines the formula for predicting the pressure that may cause an area of the pipe wall to yield is Barlow’s formula:
    P=2t(SMYS)/D
  • For operating at temperatures higher than 250°f the yield pressure is reduced by a fraction “T” that varies by temperatures above 250.
  • For butt welded API 5L pipe the yield pressure is reduced by longitudinal joint factor “E” of .6.
  • The formulas for predicting the pressure pipe may burst or leak are not utilized in the design of gas or hazardous liquid pipelines.

Related Links

Table of Pages
  1. Pipeline HUB User Resources
  2. AC Mitigation PowerTool
  3. API Inspectors Toolbox
  4. Horizontal Directional Drilling PowerTool
  5. Crossings Workflow
  6. Pipeline Toolbox
  7. Encroachment Manager
  8. PRCI AC Mitigation Toolbox
  9. PRCI Thermal Analysis for Hot-Tap Welding
  10. PRCI River-X
  11. PRCI RSTRENG
  12. RSTRENG+
  13. Ad-hoc Analysis
  14. Database Import
  15. Data Availability Dashboard
  16. ESRI Map
  17. Report Builder
  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