API 2U : 2004

Table of Contents

Nomenclature
Glossary
SECTION 1 - General Provisions
  1.1 Scope
  1.2 Limitations
  1.3 Stress Components for Stability Analysis and Design
  1.4 Structural Shape and Plate Specifications
  1.5 Hierarchical Order and Interaction of Buckling Modes
SECTION 2 - Geometries, Failure Modes, and Loads
  2.1 Geometries
  2.2 Failure Modes
  2.3 Loads and Load Combinations
SECTION 3 - Buckling Design Method
SECTION 4 - Predicted Shell Buckling Stresses for Axial Load,
        Bending and External Pressure
  4.1 Local Buckling of Unstiffened or Ring Stiffened Cylinders
  4.2 General Instability of Ring Stiffened Cylinders
  4.3 Local Buckling of Stringer Stiffened or Ring and Stringer
       Stiffened Cylinders
  4.4 Bay Instability of Stringers Stiffened or Ring and
       Stringer Stiffened Cylinders, and General Instability of
       Ring and String Stiffened Cylinders Based Upon Orthotropic
       Shell Theory
  4.5 Bay Instability of Stringer Stiffened and Ring and Stringer
       Stiffened Cylinders - Alternate Method
SECTION 5 - Plasticity Reduction Factors
SECTION 6 - Predicted Shell Buckling Stresses for Combined Loads
  6.1 General Load Cases
  6.2 Axial Tension, Bending and Hoop Compression
  6.3 Axial Compression, Bending and Hoop Compression
SECTION 7 - Stiffener Requirements
  7.1 Hierarchy Checks
  7.2 Stiffener Stresses and Buckling
  7.3 Stiffener Arrangement and Sizes
SECTION 8 - Column Buckling
  8.1 Elastic Column Buckling Stresses
  8.2 Inelastic Column Buckling Stresses
SECTION 9 - Allowable Stresses
  9.1 Allowable Stresses for Shell Buckling Mode
  9.2 Allowable Stresses for Column Buckling Mode
SECTION 10 - Tolerances
  10.1 Maximum Differences in Cross-Sectional Diameters
  10.2 Local Deviation from Straight Line Along a Meridian
  10.3 Local Deviation from True Circle
  10.4 Plate Stiffeners
SECTION 11 - Stress Calculations
  11.1 Axial Stresses
  11.2 Bending Stresses
  11.3 Hoop Stresses
SECTION 12 - References
APPENDIX A - Commentary on Stability Design of Cylindrical Shells
  C1 General Provisions
  C2 Geometries, Failure Modes and Loads
  C3 Buckling Design Method
  C4 Predicted Shell Buckling Stresses for Axial Load, Bending and
      External Pressure
  C5 Plasticity Reduction Factors
  C6 Predicted Shell Buckling Stresses for Combined Loads
  C7 Stiffener Requirements
  C8 Column Buckling
  C9 Allowable Stresses
  C10 Tolerances
  C11 Stress Calculations
  C12 References
APPENDIX B - Example - Ring Stiffened Cylinders
APPENDIX C - Example - Ring and Stringer Stiffened Cylinders

Abstract

Presents stability criteria for determining the structural adequacy against buckling of large diameter circular cylindrical members when subjected to axial load, bending, shear and external pressure acting independently or in combination.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	American Petroleum Institute
Pages
ISBN