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Title: Guidance for mechanized GMAW of onshore pipelines
Category: Technical papers from the Journal of Pipeline Engineering
Downloadable: Yes 
Project No.:
Research Agency:
Catalog No.: 2305s
Date of Publication: 2013-12-01
Price: $25.00 US
Authors: Dr Robert M Andrews, Harry Kamping, Henk de Haan, Otto Jan Huising, and Neil A Millwood
Abstract: INDUSTRY STANDARDS FOR pipeline welding generally had their origins in cellulosic welding of onshore pipelines, and this is still the dominant process in some regions. Over the years standards have been adapted to include new material grades, new processes, and more-demanding applications. Even though mechanized gas-metal-arc welding (GMAW) is now the dominant process for offshore pipelines, and is widely used in some areas of the world for large- diameter long-distance cross-country pipelines, the industry standards still do not fully reflect the subtleties of this process. This results in owners and operators having to issue amending company specifications. Moreover, there have been continual technical developments in equipment and control technology which makes mechanized GMAW ever more sophisticated. The European Pipeline Research Group identified a need to develop guidelines focused on mechanized GMAW. This paper summarizes a review document produced to form the basis of such guidelines. The document has reviewed the main industry standards and also had input from company specifications. It covers typical equipment and consumables, procedure and welder qualification, typical equipment including ancillaries, production welding, inspection and testing, acceptance criteria, and repair options. It is hoped that this work will identify best practice across the industry. Based on the initial work it is intended to develop a guidance document and input into national and international standards and others working on pipeline welding requirements.
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