High strength line pipes of API 5L grade X80 (L555M) and higher are being developed for the purpose of enhancing the transport efficiency of a pipeline by higher pressure operation and reducing pipe laying costs. This is because of reduced pipe weight and greatly reduced welding charges (reduced welding times) by use of thinner wall pipes/bends. This paper provides an overview of the evaluation, manufacturing steps and challenges during the production of high strength induction bends made from heavy TMCP plates of grade X80 (L555M) and highlights more than 15 years experience and competences of Salzgitter MGB (Mannesmann Grobblech) GmbH in this field of application. The X80 bend production is introduced with the induction bending process and the bending deformation transactions. Base materials for high strength are presented and finally the full scale burst testing for inductions bends is presented. During the past 20 years, MGB has carried out extensive R&D work in order to produce high strength X80 induction bends. During this period of time more than 2700 induction bends in material grade X80 were manufactured in the bending plant located in Mülheim, Germany.


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    Title :

    Large diameter induction bends in material grade X80 fabricated from TMCP material


    Contributors:

    Published in:

    Drei R International ; 49 , Special 1: Pipeline Technology ; 12-16


    Publication date :

    2010


    Size :

    5 Seiten, 7 Bilder, 3 Tabellen, 13 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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