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METHOD OF DETERMINING DURATION OF PERIOD BEFORE FORMATION OF STRESS-CORROSION CRACKS IN STEEL PIPELINES

机译：钢管道应力腐蚀裂纹形成前时间的确定方法

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FIELD: chemistry.;SUBSTANCE: method includes cathode protection of samples from pipe steel, change of inner sample stress and metallographic analysis of pipe steel microstructure, additionally determined is increase of hydrogen pressure in near-surface layer of samples ΔP_H2 in atm/24 hours, taking into account operation pressure of transported product in pipelines on tearing force from hydrogen pressure and cathode protection mode, critical hydrogen pressure in near-surface layer of P_H2 samples in atm is determined taking into account operation pressure of transported product in pipelines, after which duration of period in years before formation of stress-corrosion cracks is determined by formula P_H2/365*ΔP_H2, where 365 is number of days (24 hour periods).;EFFECT: increasing accuracy of predicting pipeline tears taking into account reduction of duration of stress-corrosion cracks period.;1 tbl, 2 dwg, 1 ex

机译：领域：化学;方法：方法包括对钢管样品进行阴极保护，改变样品内部应力和对钢管显微组织进行金相分析，另外还要确定样品近表层中氢压力的升高＆ P _{H2 在atm / 24小时内，考虑到管道中运输产品在氢气压力和阴极保护模式作用下的撕裂力，P _{H2 近表层的临界氢气压力确定大气中的样品时要考虑到管道中输送的产品的工作压力，然后根据公式P _{H2 / 365 *＆ΔP<来确定应力腐蚀裂纹形成之前的年限Sub> H2 ，其中365是天数（24小时）。效果：考虑到应力腐蚀裂纹持续时间的减少，提高了预测管道破裂的准确性。1tbl，2 dwg，1前}}}

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公开/公告号RU2341589C2

专利类型
公开/公告日2008-12-20

原文格式PDF
申请/专利权人 KHIZHNJAKOV VALENTIN IGNATEVICH;
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申请/专利号RU20070106685
发明设计人 KHIZHNJAKOV VALENTIN IGNATEVICH;ZHILIN ANDREJ VALEREVICH;KHIZHNJAKOV MAKSIM VALENTINOVICH;
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申请日2007-02-21
分类号C23F13/02;G01N17/00;
国家 RU
入库时间 2022-08-21 19:10:45

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