长输管道环焊缝DR检测系统评定试验研究

doi:10.11896/cldb.23100252

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Abstract Digital radiographic(DR) testing equipment has been widely promoted and applied in the inspection of circumferential welds in oil and gas pipelines. In order to establish a comprehensive quality control system for digital radiographic testing and fully evaluate the integrated system inspection ability of equipment, personnel, and processes, a scientific and standardized evaluation method to the system is very necessary. Here investigates the precedents of relevant non-destructive testing evaluation methods at home and abroad, considers the testing characteristics of DR equipment, develops a complete set of DR testing system evaluation procedures. It deeply studies the adaptability methods of program processes from defect production to slicing processing and data statistical calculation for digital radiographic testing evaluation. To check the repeatability and reliability of the detectable system, five process welds with 200 real metallographic defects were fabricated in the laboratory. From the detected results, the DR system has good repeatability in image quality, and the detectable defect size reaches 0.85 mm under achieving 90% detection probability at a confidence level of 95%, the error of detected defect length is ±2 mm, and the error of detected defect localization is ±5 mm. The qualitative and quantitative detection of defects are accurate and reliable. The test further confirmed the reliable detection ability of the DR detection system, and fully validated the scientific and practical evaluation method designed. The research on the evaluation test method can serve as an important link in the quality control system for the on-site application of digital ray equipment in long-distance pipelines. The designed program, test, and evaluation content can serve as an important basis for the formulation of relevant specifications or standards.

Key words： digital ray evaluation test repeatability reliability

Published: 25 November 2024 Online: 2024-11-22

CLC number:

TE973.6

Fund:National Petroleum and Natural Gas Pipeline Network Group Co., Ltd. Scientific Research and Technological Development Project (SJSG202201).

Corresponding Authors: *Guangyan Zhou,corresponding author,graduated from China University of Petroleum(East China) in 2009 with a Bachelor's degree in Engineering.At present,he is mainly engaged in research on non-destructive testing technologies such as ultrasound and radiation,as well as the development of non-destructive testing equipment.408058196@qq.com

About author: Changjiang Wang obtained a Master's degree in Engineering from Southwest Petroleum University in 2010. He is currently pursuing a Ph.D. at China University of Petroleum(Beijing).His main research areas include research on oil and gas pipeline construction technology and equipment,as well as achievement transformation.

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	WANG Changjiang
	WANG Xue
	ZHANG Shimin
	ZHAO Yan
	LYU Xinyu
	ZHONG Qian
	ZHOU Guangyan

Cite this article:

WANG Changjiang,WANG Xue,ZHANG Shimin, et al. Evaluation Test Research of DR Inspection System for Circumferential Welds in Long Distance Pipeline[J]. Materials Reports, 2024, 38(22): 23100252-7.

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http://www.mater-rep.com/EN/10.11896/cldb.23100252 OR http://www.mater-rep.com/EN/Y2024/V38/I22/23100252

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