COBRA扫查器
    发布时间: 2019-05-21 00:00    

COBRA手动扫查器与OmniScan MX探伤仪和16:128模块配套使用,用于对小直径管件进行周向焊缝检测。COBRA可以装配两个PA探头,检测外径在0.84英寸到4.5英寸范围之间的管件。

COBRA扫查器

COBRA手动扫查器与OmniScan相控阵(PA)探伤仪结合在一起使用,可以对小直径管道的环焊缝进行检测。COBRA扫查器可以最多装配两个PA探头,对外径范围在0.84英寸到4.5英寸的管道进行检测。

由于这款手动扫查器的外形结构细薄,因此可以对周围空间非常狭小的管道进行检测。被测管道与其周围物体,如:配管、支架或结构框架,之间的距离可以小到12毫米。这款装有弹簧的扫查器,通过使用不同数量的链部件,可以环抱在不同直径的碳钢和不锈钢管道上。扫查器的这种独特的性能可使操作人员从排管的一侧安装和操控扫查器。COBRA扫查器具有在管道上进行平滑编码移动的特点,因此可以采集到准确的数据。扫查器可最多安装两个相控阵探头,并可在单次扫查中完成整个焊缝的检测。针对直管与管件焊接部位的检测,用户可快速配置扫查器,使其仅用一个探头进行单侧检测。

这种奥林巴斯解决方案使用可在次轴上优化聚焦的薄型相控阵探头,提高了探测薄壁管道上细小缺陷的性能。我们还可为用户提供一些特别设计的薄型楔块,这些楔块适用于扫查器所覆盖的各种直径的管道,从而更进一步完善了这种解决方案。COBRA扫查器在直管的整个周向上施以稳定、持续、强劲的压力,因而可以产生优质的UT信号,获得精确的编码效果。

根据不同的应用情况,COBRA解决方案可以使用不同的探头完成检测。可以选择以下探头完成相控阵、TRL双晶线性阵列或TOFD等超声技术检测:

特性

  • 可检测外径处于0.84 英寸~4.5英寸范围内的管件。
  • 扫查器可在距被测管件12毫米(0.5英寸)的狭小空间范围内操作(适用于所有标准探头)。
  • 可同时与两个相控阵探头配套使用,在一次扫查中覆盖整个焊缝范围。
  • 经过配置,可对管件与部件的焊接部位进行单侧检测。
  • 扫查器在管件的整个周向上施以持续稳定的压力。
  • 聚氨酯滑轮有助于扫查器在管件的径向上滑动,并减少了在轴向上的偏移。
  • 小巧型、重量轻、易携带。
  • 可快速方便地更换楔块和探头。
  • 探头之间的距离在0毫米~45毫米范围内可调节。
  • 可从管件的一侧控制扫查器。
  • 装有弹簧的扫查器可用于铁磁性和非铁磁性管件的检测。
  • 防水、防锈,符合CE认证标准。
  • 编码器分辨率为32步/毫米

1. What is the minimum wall thickness that can be inspected with the COBRA on the smallest diameter pipe size?

We can't give an exact number for the wall thickness. It is too closely related to the defects, material type, noise in the material, and the operator's ability. The customers need to make their own tests because we cannot guarantee the performance for their specific applications. Small diameters lose a lot of power on each skip and thin wall pipe required multiple steps to cover wide welds. This combination can become a problem with very small and thin pipes. Unfortunately, we cannot give a number that will work in every situation without being too conservative. 

2. Is the COBRA scanner AUT code compliant?

A definite "yes "! Scanners and instruments are one part of an overall procedure or process, which has been written to comply with the various codes. They contain features such as scan speed, encoder capability, instrument linearity, software options, and data recording that make up the equipment portion of the overall process. 

COBRA helps you achieve inspection compliance for: 
- ASME CC 2235 
- ASME B31.3 CC 181 
- ASME B31.1 CC 179 

3. Can the COBRA scanner inspect pipe-to-component welds?

Yes, if the straight portion on each side of the weld is long enough, it is possible to carry out the inspection using two probes. If not, the scanner can be dismantled to perform the inspection from one side of the weld. 

4. What is the straight-pipe length needed on each side of the weld to perform an inspection with the Cobra?

59 mm of straight pipe is needed for each side. From the center of the weld, the dimension needed on each side is: 59 mm + half of the weld width.