中俄东线天然气管道工程DR 设备校验方法

1. 中国石油天然气管道科学研究院有限公司;2. 中国石油管道公司

中俄东线;X 射线数字成像检测;DR 设备;校验方法

Calibration method of DR equipment in China–Russia Eastern Gas Pipeline
LIU Quanli1, MIAO Hui2, LYU Xinyu1, ZHOU Guangyan1

1. China Petroleum Pipeline Research Institute Co. Ltd.; 2. PetroChina Pipeline Company

China-Russia Eastern Gas Pipeline, X-ray digital radiography detection, DR equipment, calibration method

DOI: 10.6047/j.issn.1000-8241.2020.04.014

备注

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。(图8表1,参[22]

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. (8 Figures, 1 Table, 22 References)

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