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Sensitivity Study Of Typical Pipelines And Station Pipes In Hydrogen Environment

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With the increasing global energy demand, the transportation volume of natural gas increases rapidly, and pipeline transportation has become the most commonly used transportation mode of natural gas. Hydrogen is produced as a byproduct of ethylene production from ethane. Hydrogen is flammable and explosive. If it is directly discharged into the atmosphere, there are some safety risks. As a kind of efficient and clean secondary energy, hydrogen can not only avoid energy waste, but also increase economic benefit if it is mixed into natural gas pipeline.

Product Number: 51322-17707-SG
Author: Fei Fan, Zhao Na, Zhou Shun, Feng Min, Shen Ke, Yang Zhiwen, Wang Chong, Chen Yingfeng, Wang Yanjun
Publication Date: 2022
Industries: Cathodic Protection , Corrosion Monitoring and Control , Coatings and Linings , Coatings
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$20.00

This article selects a certain gas pipeline system, the director of the line on material X60 steel and typical process pipeline structure of 20 # steel elbow, yard by the metallurgical structure observation of the typical sampling position and hardness tests, hydrogen permeation test compared the hydrogen and hydrogen content of X60 steel base, girth weld and hydrogen embrittlement sensitivity of 20 # steel elbow position size. The risk of hydrogen embrittlement at sensitive sites in hydrogen environment was studied by notch tensile test. The results show that the hydrogen diffusion coefficient of base metal and weld of X60 steel is higher, and the hydrogen concentration adsorbed on the surface is lower. The hydrogen diffusion coefficient of 20# steel is low, and the concentration of hydrogen adsorbed on the surface is high, which indicates that the hydrogen trap content in 20# steel is high, and it is easier to capture hydrogen atoms, and the possibility of hydrogen embrittlement exists. The notch tensile test of 20# steel at a sensitive position was carried out in a medium with a total pressure of 6 MPa and a volume fraction of 3% hydrogen. Compared with the similar experimental results in the air, the strength and plasticity of 20# steel have no obvious changes. The results show that the risk of hydrogen embrittlement of 20# steel is low in the mixed hydrogen transportation environment.

This article selects a certain gas pipeline system, the director of the line on material X60 steel and typical process pipeline structure of 20 # steel elbow, yard by the metallurgical structure observation of the typical sampling position and hardness tests, hydrogen permeation test compared the hydrogen and hydrogen content of X60 steel base, girth weld and hydrogen embrittlement sensitivity of 20 # steel elbow position size. The risk of hydrogen embrittlement at sensitive sites in hydrogen environment was studied by notch tensile test. The results show that the hydrogen diffusion coefficient of base metal and weld of X60 steel is higher, and the hydrogen concentration adsorbed on the surface is lower. The hydrogen diffusion coefficient of 20# steel is low, and the concentration of hydrogen adsorbed on the surface is high, which indicates that the hydrogen trap content in 20# steel is high, and it is easier to capture hydrogen atoms, and the possibility of hydrogen embrittlement exists. The notch tensile test of 20# steel at a sensitive position was carried out in a medium with a total pressure of 6 MPa and a volume fraction of 3% hydrogen. Compared with the similar experimental results in the air, the strength and plasticity of 20# steel have no obvious changes. The results show that the risk of hydrogen embrittlement of 20# steel is low in the mixed hydrogen transportation environment.

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Investigation of Hydrogen Embrittlement of High Strength Pipeline Steels Under Cathodic Protection

Product Number: 51317--9255-SG
ISBN: 9255 2017 CP
Author: Lei Zhang
Publication Date: 2017
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Pipeline steels higher than API X80 grade ad subject to hydrogen embrittlement risk induced by the hydrogen evolution effect under cathodic protection. This paper focuses on the hydrogen embrittlement behaviors of API X70, X80 and X90 high strength pipeline steel under cathodic protection in soil simulation conditions.
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Correlation Of Hydrogen Diffusion And Trapping Behaviour With Hydrogen Embrittlement Resistance In Line Pipe Steels

Product Number: 51321-16564-SG
Author: Ali Smith/ Philippe Darcis/ Emanuele Paravicini Bagliani
Publication Date: 2021
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Hydrogen in Steels: A Critical Review and Recommended Practices

Product Number: 51317--9548-SG
ISBN: 9548 2017 CP
Author: Mark Sadowski
Publication Date: 2017
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A summary of hydrogen bakeout history to remove hydrogen from a component. Existing recommendations regarding hydrogen bakeout in codes and standards. Results from an industry survey of energy producers. Proposed methodology for selecting bakeout parameters.

 

 
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