机械超声波探伤平台结构

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机械超声波探伤平台结构

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NDTnet 1998 January, Vol.3 No.1ndtnet1998年1卷第1号
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Mechanised Ultrasonic Inspection of Offshore Platform Structures机械超声波探伤平台结构

by E. A .Ginzel, G. Legault, Y.M.由新墨西哥大学.金泽尔瞪羚legault,y.m. Kim *金*

TABLE OF CONTENTS目录

Background:背景: Code Requirements:法典规定: Technique:技巧: Mechanics and Software Display:力学及软件展示: Qualification and Trials:资历和考验: Results:结果: Findings and Conclusions:结果和结论: Acknowledgements:鸣谢:

Background:背景: Major offshore petroleum projects are being carried out world wide.大型海洋石油工程,正进行全球性的. Drilling platforms used in the exploration are subjected to extensive inspection at the time of construction to ensure the integrity of components.钻井平台用于勘探受到广泛查阅建造时间,以确保信息的完整性部件. The main load bearing components of such a platform are the "legs" and "piles".主要承重部件这样一个平台上的"腿","桩". These are usually tubular sections welded together with the lower sections being of larger diameter and thicker wall than the upper sections.这些通常钢管焊接路段连同较低的路段被大直径和墙的厚度比上游. These tubular sections are constructed from plate rolled into cylindrical shapes with a submerged arc weld forming the long-seam.这些管状路段建成后,由钢板卷成圆筒形状,以埋弧焊形成长缝. The "can" that is formed can then be joined to other "cans" again by submerged arc welding of circumferential seams."能",即形成可以加入其他"罐头",再次埋弧焊环缝. See Figure 1 and 2.见图1和2.
Traditionally both these seams, long and circumferential, have been tested using radiography.传统这两煤层,长圆周,已测试使用照相. Results of radiography using Cobalt 60 through up to 100mm (4") of steel are dubious at best but not many facilities have the benefit of Linatrons for the better quality X-ray images. Under these conditions using Co-60, the standard 2-2T sensitivity is fuzzy at best. Normal production rates would see about 1 or 2 long seams radiographed in an eight or twelve hour shift.结果照相用钴60,通过高达100毫米(4")钢材暧昧,充其量只是不多设施有利于linatrons为更好质量X射线图象.在这些条件下用钴60,标准2灵敏度的2T是模糊,充其量.对生产经营正常率,可以看到约1或2煤层长影在8或12小时轮班工作.