Construction of high-pressure gas pipelines with API (American Petroleum Institute) X80 grade welded large diameter pipes is progressing for the improvement of transportation efficiency. The issue has been suggested that the benefit of higher strength steel of thinner wall pipe diminishes the strain capacity of line pipes by larger D/T(diameter to thickness) ratio and higher Y/T (yield to tensile) ratio of higher strength steel pipe in general. Authors reported that API X80 grade 48-inch (1219 mm) diameter line pipe has enough strain capacity against ground displacement by seismic wave propagation and lateral spread by liquefaction in seismic area based on the JGA (Japan Gas Assocation) guide line. However the pipelines are not always straight, but also curved to follow the route. Hot bends are employed to make curved portion. Mechanical properties and pipe dimensions of hot bends are different from straight pipes due to the heat treatment and deformation during bending. The characteristics of X80 hot bend are going to be investigated, and the strain capacity and the strain demand of curved portion in pipeline are evaluated by FEA (finite element analysis) for the assessment based on SBD (strain based design) concept.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Strain capacity of large diameter X80 pipeline including hot bend




    Publication date :

    2009


    Size :

    7 Seiten, 18 Quellen



    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English




    Large-diameter pipeline transportation tool

    FENG QUANLI / DONG CHAO / LI HONGXI et al. | European Patent Office | 2023

    Free access

    Large-diameter 90-degree bend pipe vertical shaft construction platform

    WANG ZAIQIANG / WANG JUN / WANG QIANG et al. | European Patent Office | 2020

    Free access

    Hoisting equipment for large-diameter pipeline

    LIU CHENGUANG / LI CHENGXIN / CHEN YANJUN et al. | European Patent Office | 2023

    Free access

    Large-pipe-diameter pipeline transportation device

    LUO LONGLONG / JING BIAO / TANG YI et al. | European Patent Office | 2023

    Free access

    The flow in a pipeline bend

    Nozicka, J. / Hobzik, J. | Tema Archive | 1985