Method of pretreating connecting elements of a gas-tight sleeve-type
pipe connection
    8.
    发明授权
    Method of pretreating connecting elements of a gas-tight sleeve-type pipe connection 失效
    预处理气密套管式连接件连接件的方法

    公开(公告)号:US5275845A

    公开(公告)日:1994-01-04

    申请号:US904058

    申请日:1992-06-24

    Abstract: A method of pretreating the connecting elements of a gas-tight sleeve-type pipe connection which includes a tight metal seat and abutting joint shoulders. The connection is effected by screwing threaded pipe ends into a sleeve having threaded portions. The pipes are of high-alloy steel and the connecting elements are of austenitic steels with chromium and nickel contents of greater than 20% by weight and molybdenum contents of greater than 2.5% by weight, as well as austenitic materials with nickel contents of greater than 50% and chromium and molybdenum contents of greater than 10% by weight. The connecting elements of the sleeve are coated with a metal layer. The method includes cleaning the connecting elements and subsequently applying as a lubricant on the connecting elements a metal-free, ceramic-based paste whose principal components are silicates, titanium oxide, and zinc sulfide as solid components, as well as vegetable oils and white oils.

    Abstract translation: 一种预紧气密套管式连接件的连接元件的方法,其包括紧密的金属座和邻接的连接肩。 连接通过将螺纹管端拧入具有螺纹部分的套筒中来实现。 这些管是高合金钢,连接元件是奥氏体钢,铬和镍含量大于20重量%,钼含量大于2.5重量%,以及镍含量大于的奥氏体材料 50%,铬钼含量大于10%。 套筒的连接元件涂覆有金属层。 该方法包括清洗连接元件,随后将作为润滑剂的润滑剂作为固体组分的主要成分是硅酸盐,氧化钛和硫化锌,以及植物油和白油 。

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