摘要
9%镍钢液化天然气储罐制造安装过程中,焊缝检验通常用常规射线照相进行。本文介绍用半自动超声相控阵检测(PAUT)取代射线照相的方法。要领分四步:(1)带缺陷专用焊接试样的制备;(2)半自动PAUT工艺的编制;(3)在有已知缺陷的焊接试样上,对PAUT工艺作"开放性"验证试验;(4)在现场对整个数据采集系统作"封闭性"操作演示和验证评定试验。验证结果表明半自动PAUT取代RT可行可靠,能凸现PAUT种种优势。
Abstract：During construction of 9 %0 nickel LNG （Liquefied Natural Gas） storage tanks, weld examination is often done by conventional radiography. This article presents the semi-automated ultrasonic examination using phased array technology （PAUT）in lieu of radiography. The essentials of the method are composed of the following four steps： （1）preparation of specific welded samples with known defects; （2） development of PAUT procedure using phased array equipment; （3）open trials on welded samples for verification of the PAUT procedure; （4）blind trials at site for demonstration/qualification of complete acquisition system. The obtained results showed it is practicable and reliable to use PAUT in lieu of RT,thus displaying some advantages of PAUT.
出处
《无损探伤》
2012年第6期1-4,共4页
Nondestructive Testing Technology
关键词
液化天然气储罐
9%镍钢
焊接接头
相控阵超声检测(PAUT)
半自动
Keywords. LNG （Liquefied Natural Gas） storage phased array examination （PAUT）
Semi-automatic tanks
9 % nickel steel
Welded joints
Ultrasonic
