calculate_pipe_collapse
Calculates subsea pipeline collapse pressure, plastic yield, elastic buckling, allowable external pressure, and maximum operating water depth per API RP 1111.
Instructions
Calculates subsea pipeline mechanical collapse pressure (Pc), plastic yield limit (Py), elastic buckling limit (Pe), allowable external pressure (Pca), and max operating water depth according to API RP 1111 (5th Edition, Limit State Design). Optionally evaluates site-specific water depth compliance and buckle arrestor requirements.
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| steel_grade | No | API 5L steel grade ('X52', 'X60', 'X65', 'X70', 'X80') or custom yield strength in psi. Default: 'X65'. | X65 |
| design_factor | No | API RP 1111 collapse design factor fc. Default: 0.70. | |
| water_depth_meters | No | Optional site-specific seabed water depth in meters to evaluate API 1111 compliance margin. | |
| outer_diameter_inch | Yes | Nominal outside diameter (OD) of the steel pipe in inches (e.g. 10.75, 12.75, 16.0). | |
| wall_thickness_inch | Yes | Nominal wall thickness (WT) of the steel pipe in inches (e.g. 0.750, 0.812, 1.000). |