The use of SNBD (StraiN Based Design) in pipeline technology has been widely discussed during the last decade, particularly for offshore applications. In fact there have been many instances where the offshore pipeline engineer had to adopt SNBD in order to avoid onerous measures necessary to meet the traditional STBD (STress Based Design) criteria, advocated by international codes at the time in force. SNBD was first introduced to make allowance for crossing bottom roughness and harsh environments, recently for HP/HT (high pressure/high temperature) applications. SNBD is currently under investigation for land pipelines, crossing regions affected by geohazards as seismic activity such as land slides, active faults, soil lateral spreading due to soil liquefaction etc. Conditions for which SNBD are applicable, as well as permissible deformations in relation to line pipe material and safe operation of the pipeline in the long run, are currently of major concern in a series of strategic project developments in North America and East Siberia. In this paper, an engineering guideline for the implementation of SNBD on land pipelines is discussed. Different aspects to be considered in the definition of permissible strains, are introduced.
Strain based design for land high grade pipelines in harsh environments
Verformungsbasierter Entwurf von Hochleistungs-Überlandrohrleitungen in rauhen Umgebungsbedingungen
2005
16 Seiten, 8 Bilder, 53 Quellen
Conference paper
Storage medium
English
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