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中俄东线天然气管道工程DR设备校验方法
Calibration method of DR equipment in China–Russia Eastern Gas Pipeline Project
China&ndash
; Russia Eastern Gas Pipeline; X-ray digital radiography detection; DR equipment; calibration method为了有效控制管道环焊缝的焊接质量,并满足智能化管道的建设需要,在中俄东线天然气管道工程中采用X射线数字成像检测(DR)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》,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。
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