Results 11 to 20 of about 538 (176)

Relationship between coercivity and stress of X80 pipeline steel

You-qi chuyun, 2022
The operation environment along the long-distance oil and gas pipelines is complex, and the abnormal external load during pipeline operation may lead to local stress concentration, which will increase the operation risk of pipeline.The coercivity-based ...
CHENG Fanju, LI Kun, DING Rong, PENG Qifeng, LI Yukun, HAN Bin   +5 more
doaj   +2 more sources

Influence of riboflavin on the corrosion of X80 pipeline steel by Sulfate reducing bacteria

Materials Research Express, 2023
The sulfate reducing bacteria(SRB) is commonly attached to the surface of buried pipeline steel, and the electron shuttle in the corrosion medium can promote the release of electrons from iron oxidation through the bacterial cell wall into the cytoplasm ...
Lei Fu, Ke Jian, Li Lin, Zhengguo Wang, Hang Yang, Yunrong Luo, Shisen Yan, Daqian Zhu   +7 more
doaj   +2 more sources

Modeling the Crack Interference in X80 Oil and Gas Pipeline Weld

Materials, 2023
Based on the numerical simulation method of the virtual crack closure technique (VCCT), an interference model was established to investigate the physical problem of two interacting cracks of different sizes in the welding zone of oil and gas pipelines.
Wei Cui, Zhongmin Xiao, Qiang Zhang, Jie Yang, Ziming Feng   +4 more
openaire   +4 more sources

Hydrogen Damage Behavior of X80 Pipeline Steel Under AC Interference. [PDF]

Materials (Basel)
X80 pipeline steel is a key material in the field of oil and gas transportation. Its damage behavior in a hydrogen-filled environment directly affects pipeline safety. In this study, through hydrogen permeation experiments and slow strain rate tensile tests, the electrochemical responses and hydrogen-induced cracking behaviors of X80 base metal and ...
Li T, Li Z, Jiang K, Cai Y, Sun W, He Z, Zhao J, Cao T, Jin J, Chen W, Gou G.   +10 more
europepmc   +3 more sources

Effects of in-service strain on girth weld failure of an X80 pipeline

Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2023
Abstract In general, transmission pipelines are designed by hoop stress induced by internal pressure, and maximum longitudinal stress. The paper is mainly about the failure analysis of an X80 pipeline brittle fracture on girth weld under in-service strain.
Hongyuan Chen, Gao Xiongxiong, Yu Dongliang, Feng Hui, Chi Qiang, Wang Lei, Huo Chunyong   +6 more
openaire   +1 more source

Strain model and experimental study of elastic viscoplastic for crack-tip zone of X80 steel pipe

Journal of Pipeline Science and Engineering, 2022
The mechanical state of the process zone at the crack-tip is one of the main factors that affect crack initiation and growth in the long-term safe operation of oil and gas pipelines. Many tests showed that the stress and strain fields in the fracture-tip
Shaohua Dong, Feng Li, Donghua Peng, Hang Zhang, Shiwen Guo, Haotian Wei, Xuan Sun, Yasir Mukhtar   +7 more
doaj   +1 more source

Investigating the effect of microstructure difference on hydrogen embrittlement sensitivity of X80 pipeline. [PDF]

Sci Rep
This work aims to reveal the complex relationship between hydrogen embrittlement behavior and microstructure of X80 pipeline. The influence of the microstructure difference between X80 pipeline base metal and weld metal on the hydrogen induced damage and hydrogen permeation behavior of the material are investigated by fracture toughness testing ...
Zhang S, Bi Z, Li J.
europepmc   +3 more sources

Progress and prospects of research and application of X80 pipeline steel and steel pipe in China

You-qi chuyun, 2020
With the rapid development of oil and gas pipeline construction, X80 pipeline steel and steel pipe have been applied on large scale. The research and application history and main progress of X80 high-grade pipeline steel and steel pipe in China were ...
Yaorong FENG, Lingkang JI, Weiwei LI, Yinglai LIU, Chunyong HUO   +4 more
doaj   +1 more source

Microstructure and Strengthening/Toughening Mechanisms of Heavy Gauge Pipeline Steel Processed by Ultrafast Cooling

Metals, 2020
Heavy gauge pipeline steels experience a low qualification in drop-weight-tear test properties because of the low cooling capability of conventional thermomechanical controlled processing.
Xue-qiang Wang, Guo Yuan, Jin-hua Zhao, Guo-dong Wang   +3 more
doaj   +1 more source

Effect of Nanosized NbC Precipitates on Hydrogen Diffusion in X80 Pipeline Steel. [PDF]

Materials (Basel), 2017
In this paper, the effects of dispersed 3~10 nm NbC precipitates on hydrogen diffusion in X80 pipeline steel were investigated by means of high resolution transmission electron microscopy (HRTEM), electrochemical hydrogen permeation, and thermal desorption spectroscopy (TDS).
Cui Q, Wu J, Xie D, Wu X, Huang Y, Li X.
europepmc   +4 more sources