摘要
为了有效控制管道环焊缝的焊接质量,并满足智慧管道的建设需要,在中俄东线天然气管道工程中采用X射线数字成像(Digital Radiography,DR)检测设备进行环焊缝焊接质量的检测。管道DR设备主要由带X射线机的爬行器、探测器、计算机、检查软件、检测工装等组成,其可靠性直接关系到管道环焊缝的检测质量。目前国内外仅针对DR设备各个组成部分提出了相应的技术指标,尚无针对整套设备系统的校验方法及校验标准,故研究制定了中俄东线DR设备校验程序,主要校验内容除相关标准规定的探测器坏像素、基本空间分辨率、最小许可灰度幅值、对比度灵敏度外,还增加了DR设备成像均匀度、缺陷检出率及可靠性测试,为中俄东线天然气管道工程高质量建设提供了技术保障。
In order to effectively control the welding quality of pipeline girth welds and meet the requirements of intelligent pipeline construction,X-ray Digital Radiography(DR)equipment was used to detect the welding quality of girth welds in China–Russia Eastern Gas Pipeline.The pipeline DR equipment is mainly composed of crawler with X-ray device,detector,computer,inspection software and detection tools,etc.,and its reliability is directly related to the inspection quality of pipeline girth welds.At present,the technical indexes are only proposed for each component of DR equipment at home and abroad,and still no calibration method and calibration standard are available for the complete equipment system.Therefore,procedures for calibration of DR equipment in China–Russia Eastern Gas Pipeline have been developed.In addition to the bad pixel,basic spatial resolution,minimum allowable gray scale amplitude and contrast sensitivity of the detector specified in related standards,the DR equipment imaging uniformity,defect detection rate and reliability test have been added as calibration items to provide technical guarantee for the high-quality construction of the China–Russia Eastern Gas Pipeline.
作者
刘全利
苗绘
吕新昱
周广言
LIU Quanli;MIAO Hui;LYU Xinyu;ZHOU Guangyan(China Petroleum Pipeline Research Institute Co.Ltd.;PetroChina Pipeline Company)
出处
《油气储运》
CAS
北大核心
2020年第4期453-458,共6页
Oil & Gas Storage and Transportation
基金
中石油管道有限责任公司课题“高钢级管道环焊缝无损检测技术研究”,2018B-3007-0501。
关键词
中俄东线
X射线数字成像检测
DR设备
校验方法
China–Russia Eastern Gas Pipeline
X-ray digital radiography detection
DR equipment
calibration method
