Operating Pressure Modules

Calculate ASME B31.8 gas pipeline wall thickness from hoop stress for onshore and offshore pipelines.

Select the appropriate line pipe schedule (ASME or ISO etc), and stress table (API, ASME or DNV), or use the user defined options. Pipe pressure can either be calculated from elevation, or user defined. For metal pipeline the pressure design thickness equals the nominal wall thickness minus the corrosion allowance. Fabrication tolerance is ignored. The wall thickness should be checked for all pipeline elevations. A wall thickness should be specified which is greater than or equal to the maximum calculated wall thickness (usually by selecting the next highest schedule thickness). Use the Result Plot option to plot the calculated wall thickness versus elevation, and the hoop stress versus elevation for the specified wall thickness.

Reference : ANSI/ASME B31.8 : Gas Transmission And Distribution Piping Systems (2018)

Change Module :

• ASME B31.8 Gas Pipeline Allowable Stress Calculation Module
• ASME B31.8 Gas Pipeline Branch Reinforcement Calculation Module
• ASME B31.8 Gas Pipeline Charpy Toughness Calculation Module
• ASME B31.8 Gas Pipeline Design Pressure Calculation Module
• ASME B31.8 Gas Pipeline Diameter And Wall Thickness Schedule Calculators
• ASME B31.8 Gas Pipeline Fluid Velocity And Flow Rate Calculation Module
• ASME B31.8 Gas Pipeline Fluid Volume And Mass Calculation Module
• ASME B31.8 Gas Pipeline Hoop Stress Calculation Module
• ASME B31.8 Gas Pipeline Hydrotest Pressure Calculation Module
• ASME B31.8 Gas Pipeline Local Pressure Calculation Module
• ASME B31.8 Gas Pipeline Mass And Weight Calculation Module
• ASME B31.8 Gas Pipeline Maximum Allowable Operating Pressure Calculation Module
• ASME B31.8 Gas Pipeline Plastic Component Calculation Module
• ASME B31.8 Gas Pipeline Ripple And Dent Defect Calculation Module
• ASME B31.8 Gas Pipeline Sour Gas Service Calculation Module
• ASME B31.8 Gas Pipeline Stress Factor And Flexibility Calculation Module
• ASME B31.8 Gas Pipeline Temperature Derating Calculation Module
• All
• More Pipeline Wall Thickness Modules

Calculate pipeline hoop stress from wall thickness and pressure using either Barlow's equation (suitable for thin wall pipes), the log equation (suitable for thick wall pipes), or Lame's equation (suitable for thick wall pipes).

The design factor should include all relevant factors (eg quality factor E and stress factor F etc). The external pressure should be set to zero for dry pipelines.

Change Module :

• Lame's Equation Compound Cylinder Or Pipe Calculation Module
• Lame's Equation Thick Wall Pipe Stress Calculation Module
• Pipeline Allowable Stress Calculation Module
• Pipeline Axial Load Calculation Module
• Pipeline Collapse Pressure Calculation Module
• Pipeline Combined Stress Check Calculation Module
• Pipeline Expansion Spool Calculation Module
• Pipeline Fluid Velocity And Flowrate Calculation Module
• Pipeline Fluid Volume And Mass Calculation Module
• Pipeline Local Pressure Calculation Module
• Pipeline Maximum Allowable Design Pressure Calculation Module
• Pipeline Natural Vibration Frequency Calculation Module
• Pipeline Test Pressure Calculation Module
• Pipeline Wall Thickness Calculation Module
• Pipeline Yield Stress And Tensile Stress Calculation Module
• All
• More Pipeline Hoop Stress Modules