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    Composite pipeline prestressed construction
    8.
    发明授权
    Composite pipeline prestressed construction 失效
    复合管道预应力施工

    公开(公告)号：US3880195A

    公开(公告)日：1975-04-29

    申请号：US34081573

    申请日：1973-03-13

    Applicant: TEXAS EASTERN TRANS CORP

    Inventor： GOODRICH BAXTER D ,  ATTERBURY THOMAS J

    IPC: F16L9/04 ,  B23P11/02

    CPC classification number: F16L9/04 ,  Y10S138/05

    Abstract: A composite pipeline construction is disclosed wherein a plurality of lengths of steel pipe are connected together, as by welding, to form an elongated tubular shell. One or more layers of a strengthening material, preferably low carbon, martensitic steel strap, are wrapped around the exterior of the shell. Slight clearances or gaps may be provided between the adjacent turns of the wrap of each layer and the wrapping may be done so that the gaps of one layer are covered by the material of the wrap of the next layer. The dimensions and strength of the pipe and wrap are determined so as to satisfy certain design criteria when the pipeline is operating at its normal design pressure. Prior to being placed in operation, the pipeline is subjected to a predetermined prestressing pressure, based upon the aforementioned design criteria, which is sufficient to stress the pipe portions beyond their yield strength but which is insufficient to stress the wrap beyond its yield strength. After depressurization and during subsequent operation at normal pressures, the stresses in the pipe and wrap do not exceed their respective yield strengths.

    Abstract translation: 公开了一种复合管道结构，其中通过焊接将多个长度的钢管连接在一起，以形成细长的管状壳体。 一层或多层强化材料，优选低碳马氏体钢带缠绕在外壳的外部。 可以在每个层的包裹物的相邻匝之间提供微小的间隙或间隙，并且可以进行包装，使得一层的间隙被下一层的包裹材料覆盖。 确定管道和包装的尺寸和强度，以便在管道以其正常设计压力运行时满足某些设计标准。 在进行操作之前，基于上述设计标准，使管道受到预定的预应力，其足以使管道部分超出其屈服强度，但是不足以使外包件超出其屈服强度。 减压后和在常压下的后续操作中，管和包装中的应力不超过它们各自的屈服强度。

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