油气田压力容器裂纹形成原因与预防  

Forming Causes and Precautions of Cracks in Pressure Vessels of Oil-Gas Fields

作　　者：白金亮[1] 

机构地区：[1]中国石油长庆油田分公司技术监测中心,陕西西安710021

出　　处：《石油工业技术监督》2011年第12期5-7,共3页Technology Supervision in Petroleum Industry

摘　　要：压力容器发生的裂纹基本都是与焊缝平行,呈树枝状曲折的细缝,个别部位有细微分叉,有时呈"之"字形或"人"字形,用10倍放大镜观察,没有金属宏观体积上的塑性变形。通过分析油气田在用压力容器应力腐蚀裂纹产生的原因和机理,提出了应力腐蚀裂纹的检验方法和防止措施。Cracks produced in pressure vessels are basically parallel to the welding seam,taking on the tiny twist cracks like branching or treelike marks.Individual parts of them are slightly branching,with the shape of Chinese character ＂Zhi＂ or ＂Ren＂.Under the observation of ten diameters magnifier,there is no plastic deformation in metal macro-size.Through the analysis on the forming causes and mechanism of stress corrosion cracks in pressure vessels used in oil-gas fields,the detecting measures and precaution measures for stress corrosion cracks are put forward in this paper.

关 键 词：应力腐蚀裂纹 检验方法 防止措施 

分 类 号：TE937[石油与天然气工程—石油机械设备]