Table of Contents

1 Scope<br>&nbsp;&nbsp;1.1 Applications<br>&nbsp;&nbsp;1.2 Exceptions<br>&nbsp;&nbsp;1.3 Safety Considerations<br>&nbsp;&nbsp;1.4 Conventions<br>2 Normative References<br>3 Definitions<br>4 Design<br>&nbsp;&nbsp;4.1 Design Considerations<br>&nbsp;&nbsp;4.2 Design Criteria<br>&nbsp;&nbsp;4.3 Support Spacing<br>&nbsp;&nbsp;4.4 A Sample Problem and Its Solution<br>5 Procedure Considerations<br>&nbsp;&nbsp;5.1 General<br>&nbsp;&nbsp;5.2 Safety Precautions<br>&nbsp;&nbsp;5.3 Terrain<br>&nbsp;&nbsp;5.4 Soil<br>&nbsp;&nbsp;5.5 Other Considerations<br>&nbsp;&nbsp;5.6 Trenching Requirements<br>&nbsp;&nbsp;5.7 Supports<br>6 Inspection<br>&nbsp;&nbsp;6.1 General<br>&nbsp;&nbsp;6.2 Girth Welds<br>&nbsp;&nbsp;6.3 Inspection for External Corrosion<br>&nbsp;&nbsp;6.4 Inspection for Mechanical Damage<br>&nbsp;&nbsp;6.5 External Coating<br>7 Cleanup<br>&nbsp;&nbsp;7.1 General<br>&nbsp;&nbsp;7.2 Backfilling<br>&nbsp;&nbsp;7.3 Surface Restoration<br>8 Documentation and Records<br>&nbsp;&nbsp;8.1 General<br>&nbsp;&nbsp;8.2 Alignment Sheets<br>&nbsp;&nbsp;8.3 Files<br>Annex A - Nomenclature<br>Annex B - Derivation of the Equation for Longitudinal Stress Due to<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Bending and of the Equation for Trench Length<br>Annex C - Derivation of Trench Profile Equation<br>Annex D - Derivation of Equation for Longitudinal Stress Due to<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Elongation<br>Annex E - Derivation of Equation for Maximum Free Span Between Pipe<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Supports<br>Annex F - Equations<br>Bibliography

Abstract

Describes the design, execution, inspection, and safety of a pipeline-lowering or other movement operation conducted while the pipeline is in service.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	American Petroleum Institute
ProductNote	Reconfirmed 2008
Pages
ISBN