In recognition of the increasing trend toward the strain-based design of pipelines and the need for basic guidance on strain-based design, the Minerals Management Service (MMS) and the Office of Pipeline Safety (OPS) co-funded EWI to provide general…
The principal objective of this project is to develop tools that allow for the evaluation of the effects of wall loss (corrosion) anomalies on pipelines experiencing high longitudinal strains. The first phase of this project started in 2016 and…
There are no generally accepted industry standards that allow the determination of the maximum tensile strain limits of girth welds. Most ECA (Engineering Critical Assessment) codes are stress-based and cannot be used if the longitudinal strain is…
This work investigates the effect of the yield-to-tensile strength ratio (Y/T) has on the mechanical damage tolerances of steel pipelines subject to high strain loading conditions. The work includes full-scale tests and the development of an…
The reliability-based procedure similar to that presented in this report is useful in risk-informed design and maintenance of pipelines. It allows more effective use of new materials, construction practice, and maintenance procedures. However, the…
This project is a part of a multi-year effort intended to develop alternative defect acceptance criteria for pipelines experiencing high longitudinal strains. A systematic investigation of various factors affecting the tensile strain limits of…
Guidelines for Reliability Based Design and Assessment of Onshore Natural Gas Pipelines
Limit State Functions for Excessive Strains in Pipelines Due to Ground Movement
Target Reliabilty Levels for the…
This project is a part of a continuing effort in developing more realistic and precise Engineering Critical Assessment procedures for assessing planar defects in pipeline welds. The primary objective of this work was to review and generate…
This report provides an overview and introduction to the use of strain-based design and assessment (SBDA) approaches to ensure mechanical integrity for pipelines that may be (design focus) or have been (operational focus) subjected to significant…
This report specifically covers the work of the second project aimed at the development of second generation tensile strain design models. This project covers the development of tensile strain design models which form a key part of the strain-based…